tag:blogger.com,1999:blog-13517909665418181192024-02-18T23:16:02.446-09:00Shepson Lab BROMEX Adventures!Follow the adventures of the Shepson Lab as part of the NASA BROMEX campaign in Barrow, Alaska!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.comBlogger57125tag:blogger.com,1999:blog-1351790966541818119.post-30490946590101265412016-02-25T19:19:00.003-09:002016-02-25T19:19:40.626-09:00Updates & Barrow 2016!<a href="https://www.lsa.umich.edu/chem/people/faculty/ci.prattkerri_ci.detail">Kerri Pratt</a> is an assistant professor in the Department of Chemistry and Department of Earth & Environmental Sciences at the University of Michigan! This is a belated post, as I started this position in Summer 2013! Please check out our group website! <a href="http://prattlab.chem.lsa.umich.edu/">http://prattlab.chem.lsa.umich.edu/</a><br />
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We are in Barrow again for a NSF-funded springtime halogen chemistry study! This is a collaborative study between Purdue University, the University of Michigan, and Penn State. Angela Raso, a Purdue University PhD student co-advised by Prof. Paul Shepson and Prof. Kerri Pratt, is now in Barrow with the chemical ionization mass spectrometer, after having spent 4 months preparing for the study in my lab at the University of Michigan. Three Pratt Lab students will be flying to Barrow this weekend to join Angela and the Penn State folks!<br />
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For updates about the Barrow 2016 field study, see the following two blogs:<br />
Pratt Lab Blog: <a href="http://prattlab.blogspot.com/">http://prattlab.blogspot.com/</a><br />
Angela Raso's Blog: <a href="http://snowkidding.blogspot.com/">http://snowkidding.blogspot.com/</a><br />
Please follow our adventures!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-31328865655564934362013-06-11T18:11:00.000-08:002013-06-11T18:11:11.994-08:00New Video about Tundra Lab ResearchDerek Hallquist, at <a href="http://www.grpvt.com/" target="_blank">Green River Pictures</a>, with the help of Aaron Woolf, produced another video about the Shepson Group's Arctic tundra lab studies! Check out: <a href="http://vimeo.com/67918840" target="_blank">Climate Research by Land - Barrow, AK</a>!<br />
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Thank you Derek! <br />
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<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-59595495348783103842013-04-23T13:00:00.002-08:002013-04-23T13:00:27.553-08:00Research highlighted on LiveScience.comOur research has been highlighted on LiveScience.com in the an article titled <a href="http://www.livescience.com/28981-arctic-sea-ice-loss-air-chemistry.html" target="_blank">"Sea Ice Loss Could Alter Arctic Air Chemistry"</a>!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-31801082770401181382013-04-22T05:00:00.001-08:002013-04-22T05:02:27.770-08:00Research highlighted in Chemical & Engineering News!Our research was highlighted in <a href="http://cen.acs.org/articles/91/i16/Origin-Arctic-Bromine-Identified.html" target="_blank">this week's issue of Chemical & Engineering News</a>!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-29145338253442943202013-04-20T09:54:00.000-08:002013-04-20T09:54:09.677-08:00Research highlighted by National Science FoundationOur research was highlighted by the National Science Foundation: "<a href="http://www.nsf.gov/news/news_summ.jsp?cntn_id=127688" target="_blank">Sunlit snow triggers atmospheric cleaning, ozone depletion in the Arctic</a>". Right now we're highlighted as the second frame on the <a href="http://www.nsf.gov/index.jsp" target="_blank">NSF main page "Sea-Ice Snow Affects Arctic Air Chemistry"</a>!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-49418059946125526722013-04-20T09:45:00.002-08:002013-04-20T09:45:28.168-08:00Video about the Shepson Group's Arctic aircraft studies!Derek Hallquist, at <a href="http://www.grpvt.com/" target="_blank">Green River Pictures</a>, with the help of Aaron Woolf, produced a fantastic new video about the Shepson Group's Arctic aircraft studies! Check out: <a href="http://vimeo.com/64428165" target="_blank">Sea Ice Climate Research with Experimental Plane in Barrow, Alaska</a>!<br />
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Thank you Derek! <br />
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<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-5376273984394113622013-04-18T07:56:00.002-08:002013-04-18T08:07:08.600-08:00Post-doc Kerri Pratt highlighted by the Earth Science Women's NetworkPost-doctoral researcher Kerri Pratt was highlighted by the Earth Science Women's Network! Check out the write-up at: <a href="http://eswnonline.org/kerri-pratt/">http://eswnonline.org/kerri-pratt/</a>.<br />
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<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-71072981512773519662013-04-16T08:59:00.002-08:002013-04-16T08:59:43.264-08:00Research highlighted by Purdue News ServiceOur research was highlighted by the Purdue News Service: <a href="http://www.purdue.edu/newsroom/releases/2013/Q2/sunlit-snow-triggers-atmospheric-cleaning,-ozone-depletion-in-the-arctic.html" target="_blank">"Sunlit snow triggers atmospheric cleaning, ozone depletion in the Arctic"</a>!<br />
<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-3905040315870869332013-04-14T10:21:00.002-08:002013-04-20T10:43:12.088-08:00Arctic snow photochemistry paper published in Nature Geoscience!During BROMEX, we conducted snow chamber experiments investigating the surface for bromine activation in the Arctic. Today our manuscript has been published in Nature Geoscience!<br />
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Using an outdoor snow chamber, we observed the surface snow above first-year sea ice and tundra to be an efficient source of bromine. Chemical reactions within the snow grains produced molecular bromine under sunlit conditions. The surface snow samples were characterized by bromide, originally from sea water, and acids from the influence of Arctic haze, a urban-like smog produced from the transport of atmospheric pollutants from the mid-latitudes. Reaction with ozone in the air between the snow crystals dramatically increased the amount of molecular bromine produced, which is then released to the atmosphere via wind pumping. Indeed, when using our Purdue University Airborne Laboratory for Atmospheric Research (ALAR), a small aircraft, for spatially-distributed measurements of bromine monoxide, we found it to be located directly above snow over first-year sea ice and tundra, consistent with the snow chamber experiments.<br />
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The frozen surfaces in the Arctic are key to this unique natural
chemistry that is being perturbed by the rapid loss and transformation
of sea ice in the Arctic. Professor Jon Abbatt wrote a News & Views article in Nature Geoscience that gives further context to this work. See below for links!<br />
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Link: <span lang="EN-US" style="font-family: "Arial","sans-serif"; font-size: 10.0pt;"><span style="color: blue;"><a href="http://dx.doi.org/10.1038/ngeo1779"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; text-decoration: none;">http://dx.doi.org/10.1038/ngeo1779</span></a></span>
</span><br />
News & Views article: <span style="color: blue;"><a href="http://dx.doi.org/10.1038/ngeo1805"><span lang="EN-US" style="font-family: "Arial","sans-serif"; font-size: 10.0pt;"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; text-decoration: none;">http://dx.doi.org/10.1038/ngeo1805</span></span></a></span><br />
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Dr. Kerri Pratt, NSF Postdoctoral Fellow in Polar Regions
Research in Prof. Paul Shepson's lab, conducts a snow chamber experiment at -44<span style="mso-bidi-font-family: "Times New Roman";">º</span>F windchill near Barrow,
Alaska<span style="mso-bidi-font-family: "Times New Roman";">. (Photo credit: Paul Shepson)</span></div>
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This research was funded by NSF and NASA and completed in collaboration with many fantastic scientists!<br />
<b>Dr. Kerri Pratt</b> - National Science Foundation Postdoctoral Fellow in Polar Regions Research, Department of Chemistry, Purdue University<br />
<b>Kyle Custard</b> - Purdue University Chemistry Ph.D. Student<br />
<b>Prof. Paul Shepson</b> - Purdue University Professor of Chemistry, Founder of Purdue Climate Change Research Center<br />
<b>Dr. Tom Douglas</b> - Research Chemist, U.S. Army Cold Regions Research and Engineering Laboratory (Fairbanks, Alaska)<br />
<b>Dr. Denis P</b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>öhler</b> - Research Assistant, Institute of Environmental Physics, University of Heidelberg</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Stephan General</b> - University of Heidelberg Physics Ph.D. Student</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Johannes Zielcke</b> - University of Heidelberg Physics Ph.D. Student</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Prof. Bill Simpson</b> - University of Alaska Fairbanks Professor of Chemistry</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Prof. Ulrich Platt</b> - Professor,</span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"> Institute of Environmental Physics, University of Heidelberg</span></span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>David Tanner</b> - Research Assistant, Department of Earth and Atmospheric Sciences, Georgia Institute of Technology</span></span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Prof. Greg Huey</b> - Professor of Earth and Atmospheric Sciences, Georgia Institute of Technology</span></span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Mark Carlsen</b> - Instrumentation Specialist, Jonathan Amy Facility for Chemical Instrumentation, Department of Chemistry, Purdue University</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><b>Brian Stirm</b> - Air Operations Technical Specialist, Department of Aviation Technology, Purdue University</span><br />
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><br /></span><!--[if gte mso 9]><xml>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;">Thank you to Son Nghiem (NASA JPL) for helping organize BROMEX, Randy Replogle (Purdue) for building the snow chamber, UMIAQ and CH2M Hill Polar Services for field logistical assistance, Obie Cambaliza and Dana Caulton (Purdue) for aircraft attitude data, Matt Sturm (CRREL) for chamber design advice, Wes Halfacre (Purdue) for ozone monitor calibration, Eric Boone (Purdue) for aerosol data analysis, and Ross Lieb-Lappen (Dartmouth) for field discussions. Thank you also to all of our fantastic BROMEX collaborators that made this field campaign a huge success!</span><!--[if gte mso 9]><xml>
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</xml><![endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-font-size: 11.0pt; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"></span>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-64781837334359261502012-04-23T07:50:00.001-08:002012-04-24T19:45:06.251-08:00Trip Journal: Flying ALAR from Alaska to Indiana!<b><span style="font-family: "Times New Roman","serif"; font-size: 12pt;"></span></b><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">Well, we finally made it back! What a trip!
The weather wasn’t exactly perfect, like it was all the way to Barrow,
and the whole time we were in Barrow.
The weather was really exactly the same in Barrow, every day - sunny,
cold and winds from the northeast. I
think we got outta Dodge just in time!
Because of some problems with a relay on the master switch at low temperatures,
we decided we would fly back through Fairbanks, so that our first overnight
would be in a warmer climate (about 50F warmer in Fairbanks compared to
Barrow). </span><br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUfZuOKytyS5tT7a34_Ybn-rdDMdOybGELAh8vd5MzPAQ2hYn3pHkqefQqU4BSj02kreG7vtMgt-3ICfSaeqxidDjt_phKCvkt2uNLoykc_1hUdpkp0Otx0TlfD84MuJFd6ZVfzQ5NxYg/s1600/Picture1.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="482" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUfZuOKytyS5tT7a34_Ybn-rdDMdOybGELAh8vd5MzPAQ2hYn3pHkqefQqU4BSj02kreG7vtMgt-3ICfSaeqxidDjt_phKCvkt2uNLoykc_1hUdpkp0Otx0TlfD84MuJFd6ZVfzQ5NxYg/s640/Picture1.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">The view was fantastic, going over the Brooks
Range!</span></td></tr>
</tbody></table>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">On April 2<sup>nd</sup>, we stayed over night in
Fairbanks, at Pike’s Waterfront Lodge.
Nice place! Unfortunately, the
area was socked in the next day, with a good chance of icing. Since our airplane has no deicing equipment,
we had to sit for a day.</span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;"> This</span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;"> </span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">never happened in Barrow - it is too cold for
icing! So, Brian and I visited Everts
Air Cargo. They have a field full of
classic airplanes, which they use for cargo jobs all around Alaska. They seem to use lots of DC-4s. </span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">They have an amazing maintenance staff at Everts. Anyone want a job flying DC-4s? I think they are looking for pilots! </span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;"> Below is a pic of one of the airplanes
on the field. It is a Curtis C-46 most famous for flying the "Hump" over the mountains in China during WW2. </span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFWmXiGakHXrS69b5r2RmhgaO8NSIhDYqQCvb8gqY06Uju0PIbyPv0M7cga8noPyqc_voWR1W-VHTZWz8xC2K3F-aSTPmkCoX-2tyX3etYmsiDPnlP7XXxCNYV5wNHnHZA4zP12cMeeSU/s1600/Picture2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="512" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFWmXiGakHXrS69b5r2RmhgaO8NSIhDYqQCvb8gqY06Uju0PIbyPv0M7cga8noPyqc_voWR1W-VHTZWz8xC2K3F-aSTPmkCoX-2tyX3etYmsiDPnlP7XXxCNYV5wNHnHZA4zP12cMeeSU/s640/Picture2.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">The next day, April 4, we headed off for our border
crossing into Canada, at Whitehorse, Yukon Territories. See above below for a cool volcanic mountain
on the way.</span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2HiYVu4kZTKSiVSjSTdPoExOU7rvVTkfCsQAir_JfBUdADo7hWfLRA_eKvVY8HdUivVHZubrShTD04vinackRkc0eSQGNCk1nlFLEwuq3fyNaJz9Ph8Z6m7SKJzD200hMtAD293cyyzI/s1600/Picture3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="522" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2HiYVu4kZTKSiVSjSTdPoExOU7rvVTkfCsQAir_JfBUdADo7hWfLRA_eKvVY8HdUivVHZubrShTD04vinackRkc0eSQGNCk1nlFLEwuq3fyNaJz9Ph8Z6m7SKJzD200hMtAD293cyyzI/s640/Picture3.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">At Whitehorse, we got an in-person briefing from a
nice guy, who told us, yes, you will now get into icing, on the way to Ft.
Nelson. But, you can follow the Alcan
Highway, VFR, all the way, with multiple places to land, if you needed to (“we
typically try to discourage people from landing on the road. But…”).
So, this is what we did. It was a
great suggestion, we had a fantastic flight, once again with great views! The picture below shows what it looked
like following the road to Ft. Nelson.
We then landed at Ft. Nelson, where there is, well, nothing. </span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgysHmQAhuXyJ2CGJ8iBJ-7dQsgPTOSk3Qfe29E14TPWu-RBmYvM3XBxKHST2JcM9a5L8PL7KYlzClkQ47PW02KmYrAwzdtQSwEZ2r52qmbaAdnIb5CEGVKm2NpxNcWfItG7FRaTKQRscg/s1600/Picture4.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="522" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgysHmQAhuXyJ2CGJ8iBJ-7dQsgPTOSk3Qfe29E14TPWu-RBmYvM3XBxKHST2JcM9a5L8PL7KYlzClkQ47PW02KmYrAwzdtQSwEZ2r52qmbaAdnIb5CEGVKm2NpxNcWfItG7FRaTKQRscg/s640/Picture4.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">From Ft. Nelson we flew to Peace River, Alberta
(IFR), and, well, not much to see there, and it was late in the day. When we got to Peace River, the weather
turned bad, and we had to stay there an extra
day. Brian and I walked all the way
around Peace River. Peace River is nice,
lots of ice all around the banks of the river.
A pretty cool looking ski area there, called “Misery Mountain Ski
Hill”. Sounds like fun, eh? A pic of the ski area is shown below,
from our hotel window. </span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKWRv7jvPJH424I54A4k9vvAGZY2smp_25CWir_8_yNFYJGfc2UIOq94q6bHxhQ6M8f7P7nmMyBvuGKE_rHQ2Sz4hWIC9Fcop39RYFUq6xddbn7C2xWZp5XpB3lUwCOrOwb0SytEQcJrk/s1600/Picture5.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="514" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKWRv7jvPJH424I54A4k9vvAGZY2smp_25CWir_8_yNFYJGfc2UIOq94q6bHxhQ6M8f7P7nmMyBvuGKE_rHQ2Sz4hWIC9Fcop39RYFUq6xddbn7C2xWZp5XpB3lUwCOrOwb0SytEQcJrk/s640/Picture5.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">On April 6, we flew to Lethbridge, near the Montana
border with Alberta. It was time to
cross the border back into the U.S., but the ceiling was low, and, again, there
was a chance of icing. So, we decided,
after talking with some
locals, to cross the border at Del Bonita, Albert/Montana. There is a grass strip there, and the center
“line” of the runway is right on the border.
The right side of the center line is Canada, and the left side of the
center line is the U.S. (when you are landing to the west). It was a 38mile trip. We landed, and they seemed happy to have
something to do. In the U.S. customs
building (turn left at the end of the “runway”; if you turn right, you are at
Canada Customs), we signed in and they told us we were the second </span><span style="font-family: "Times New Roman","serif"; font-size: 12pt;">airplane to land there in 2012! See the pic of the N762JT at “Wetstone
International Airport”, below. </span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRR5RJDjoTnk5O_WNWWZPvhjbUVlsYgWj9111K1AjWFKmN9SLgns04KE0VWYVjcL6p4lxeiUrf2TtbeZs6eNnke78TNG7F71zF6Vic-rv1jmxXE4GNJqsf_lHNo7lSO3rgd-clyCF0_8Y/s1600/Picture6.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="508" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRR5RJDjoTnk5O_WNWWZPvhjbUVlsYgWj9111K1AjWFKmN9SLgns04KE0VWYVjcL6p4lxeiUrf2TtbeZs6eNnke78TNG7F71zF6Vic-rv1jmxXE4GNJqsf_lHNo7lSO3rgd-clyCF0_8Y/s640/Picture6.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;">We then tried to go a little further, but the
weather got worse, so, we landed at Starr-Browning airport, in Browning, Montana. This is a Blackfeet Reservation. Interesting place. Great views!
See Brian, standing next to 2JT and near the runway, looking west, below. The nice man who owns the airport
gave us a ride into town, and we stayed over night. Dinner at the casino…. </span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHoJEFWCxPcqLtZn8dFKutYc3dSlEFD4EQSIPuuYncKfk88jJVDYEJkmzoYgK4B3kPA7p6V2liTqok_A9TChMf-G6QCnB9hU_qv82aTjWqKtloDBbpKoJgdnAgm29zspDUOLUkiJ0Whs4/s1600/Picture7.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="502" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHoJEFWCxPcqLtZn8dFKutYc3dSlEFD4EQSIPuuYncKfk88jJVDYEJkmzoYgK4B3kPA7p6V2liTqok_A9TChMf-G6QCnB9hU_qv82aTjWqKtloDBbpKoJgdnAgm29zspDUOLUkiJ0Whs4/s640/Picture7.jpg" width="640" /></a></div>
<div class="MsoNormal">
The next day the weather was fine. We flew to Miles City MT, and then through
South Dakota. Hey, there’s no one down
there at all! Then Des Moines, through a
light rain frontal system, and then, here is what we saw - ILS Runway 10,
KLAF. It is hard to tell you how good it
felt to see that! Brian!!! We did it!!!</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCSgly4bnMuf1t9GQ5t0eMPdVqSgsRtMFvprWOfsMwGt8oin5uRYvDlVGq_qm_IXtDyuGx1il8HJf3l5wJ0V82XT_bXLfwODu8AteagmatyfmreIX5MpFGlsOZyeVcR4SQ939ooD-1re8/s1600/Picture8.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCSgly4bnMuf1t9GQ5t0eMPdVqSgsRtMFvprWOfsMwGt8oin5uRYvDlVGq_qm_IXtDyuGx1il8HJf3l5wJ0V82XT_bXLfwODu8AteagmatyfmreIX5MpFGlsOZyeVcR4SQ939ooD-1re8/s640/Picture8.jpg" width="640" /></a></div>
<span style="font-family: "Times New Roman","serif"; font-size: 12pt;"> Here's the full route, up and back:</span><br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUd8nV7hJWH5meHtdrzCJNnLacDI3D5taEzdgthZpZ3ak020Xw160WR_GR-qVqof9RSrJ6J6DLgBiUB9CrE-IQMDsrpZRjNWzXA7WStL5qgPTH772uQ0y4el5r6yPu_CXYaFrCtgSKcdI/s1600/flightmap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="476" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUd8nV7hJWH5meHtdrzCJNnLacDI3D5taEzdgthZpZ3ak020Xw160WR_GR-qVqof9RSrJ6J6DLgBiUB9CrE-IQMDsrpZRjNWzXA7WStL5qgPTH772uQ0y4el5r6yPu_CXYaFrCtgSKcdI/s640/flightmap.jpg" width="640" /></a></div>
<br />
- Prof. Paul ShepsonKerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-55410030225421478422012-04-17T09:17:00.000-08:002012-04-17T09:17:25.076-08:00Heading home in the footsteps of USNA!After the US Naval Academy students left Barrow, they took a slight detour in Anchorage, so when our study got extended, we decided to follow their plan! During our layover in Anchorage, Kyle and I headed out to Alyeksa Ski Resort for amazing views and some fun spring skiing!<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzo6YYkklVu1gbX4K-jOJWOOOjkbqlKzTmR8YX2RysF2VIkraDcENDWVQzV9AXNFTpxV4qTeDTkApmddBOzfZT2JUkRScPZD0WwkS08xulBp8N4XSb1qm0Gg_78PrFfgXBm1KI9ZPnDk8/s1600/IMG_0311.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzo6YYkklVu1gbX4K-jOJWOOOjkbqlKzTmR8YX2RysF2VIkraDcENDWVQzV9AXNFTpxV4qTeDTkApmddBOzfZT2JUkRScPZD0WwkS08xulBp8N4XSb1qm0Gg_78PrFfgXBm1KI9ZPnDk8/s640/IMG_0311.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Kerri and Kyle enjoying some fun spring skiing/snowboarding after the 8 week field study!</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">We found the USNA sticker outside the mid-mountain cafe!</td></tr>
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Thank you so much to Ingrid and Bill for hosting our amazing visit to Anchorage!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-35230040419966952092012-04-12T12:56:00.000-08:002012-04-12T12:56:29.095-08:00Packing Up!The time has come. After an extremely successful field campaign, we are packing up and heading back to Indiana. Kyle and I have been in Barrow since Feb. 18th. When we arrived, sunrise and sunset were at 9:57 AM and 5:25 PM; now, the days are ~8.5 hours longer with sunrise and sunset today at 6:22 AM and 10:33 PM. Spring has arrived in Barrow. It is "warm" - currently 1F with a wind chill of only -15F! In late February to early March, we got used to temperatures around -30F with wind chills reaching below -50F.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNUL2BYXt3rqSAGmoxZNFbSzjRMLFuXKaX-ylouray0mbHfiX47oesEfqEP25JYaaMx-gQcXa6tKgzvWlpt2Xr6X4xRkJl9MJKV5CO_FhA3vu6aaX7_SfG3hmu5RCbUMfwAwXNh90glU0/s1600/IMG_1751.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNUL2BYXt3rqSAGmoxZNFbSzjRMLFuXKaX-ylouray0mbHfiX47oesEfqEP25JYaaMx-gQcXa6tKgzvWlpt2Xr6X4xRkJl9MJKV5CO_FhA3vu6aaX7_SfG3hmu5RCbUMfwAwXNh90glU0/s640/IMG_1751.JPG" width="426" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Celebrating by walking on the snow that I protected for 2 months for experiments (I was known by the logistics folks for insisting "Don't step on the snow!!!!!" in the winter in Barrow!)</td></tr>
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Over the past couple days, we packed up all of our equipment and impressive number of compressed gas cylinders (21 + two 160 L liquid nitrogen dewers!) and took them to the airport to Northern Air Cargo for shipment to Anchorage and beyond. <br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBPoXJybonIs9QCaU11ldF3A0oJk2clw8PH4VxJqfzNDhh2RbONHVVOgOe33Z6dM9Qcl2MZJ5lMQ5SPlIfJH_CcnKoThOhVmx8HfXTF-ZtxWpgCF-E9JncRbcthTSLUMUc57Ra8Y1lahc/s1600/IMG_1728.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBPoXJybonIs9QCaU11ldF3A0oJk2clw8PH4VxJqfzNDhh2RbONHVVOgOe33Z6dM9Qcl2MZJ5lMQ5SPlIfJH_CcnKoThOhVmx8HfXTF-ZtxWpgCF-E9JncRbcthTSLUMUc57Ra8Y1lahc/s640/IMG_1728.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Kyle securing crates to a pallet at Northern Air Cargo.</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">The folks at Northern Air Cargo were incredibly helpful and even insisting on covering our pallets with lots of "Fragile" and "Don't Freeze" stickers in hopes of protecting our shipment!</td></tr>
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<b>Photo Request - A Family of Snowmobiles! </b><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEiHjODrXyyRigkoVKarpvWf9_ty5ukKDytfThiPgtiW1zMR6L50kC5UbttIlduNUoUJpXm5koDy4jfpQoHteJX7lpTIFBGcVtVxf2BtWaVPhJjDbMj4qjCGgp8f-xCnaAiw-PoKK6jHs/s1600/IMG_1713.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEiHjODrXyyRigkoVKarpvWf9_ty5ukKDytfThiPgtiW1zMR6L50kC5UbttIlduNUoUJpXm5koDy4jfpQoHteJX7lpTIFBGcVtVxf2BtWaVPhJjDbMj4qjCGgp8f-xCnaAiw-PoKK6jHs/s640/IMG_1713.JPG" width="640" /></a></div>
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P.S. This isn't the last post! Stay tuned for more! :-)Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com1tag:blogger.com,1999:blog-1351790966541818119.post-77105092853259700072012-04-09T12:27:00.001-08:002012-04-09T12:27:50.491-08:00ALAR returns to IndianaProfessor and pilot Paul Shepson and aircraft mechanic Brian Stirm flew
the Purdue airplane (ALAR, Aircraft Laboratory for Atmospheric Research)
back to West Lafayette, Indiana. See below for their flight path to
and from Barrow! Stay tuned for a post about their trip!<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUd8nV7hJWH5meHtdrzCJNnLacDI3D5taEzdgthZpZ3ak020Xw160WR_GR-qVqof9RSrJ6J6DLgBiUB9CrE-IQMDsrpZRjNWzXA7WStL5qgPTH772uQ0y4el5r6yPu_CXYaFrCtgSKcdI/s1600/flightmap.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="478" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUd8nV7hJWH5meHtdrzCJNnLacDI3D5taEzdgthZpZ3ak020Xw160WR_GR-qVqof9RSrJ6J6DLgBiUB9CrE-IQMDsrpZRjNWzXA7WStL5qgPTH772uQ0y4el5r6yPu_CXYaFrCtgSKcdI/s640/flightmap.jpg" width="640" /></a></div>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-46702749165631284622012-04-06T13:27:00.001-08:002012-04-06T14:46:30.799-08:00Field Work can be ChallengingComplicated instruments don't like to be moved; nor do they like to operate under harsh conditions. But, for some strange reason, I have a passion for taking complicated, sensitive instruments into the field, whether that be operating with outdoor temperatures of ~115F in the summer in Riverside, CA, flying on a C-130 through ice clouds, taking instruments up a ski mountain via snow-cat, or now operating with outdoor temperatures down to -36F (wind chills of >-50F) on the tundra. When you do a field study, you expect problems; operating in the field takes patience and persistence under stress and great urgency. So, when we had problems with a turbo-molecular pump on the mass spectrometer, I wasn't too surprised. The good news is that after my third trip
in the last week to Alaska Airlines for their Goldstreak service, I now have the
mass spectrometer up and running again! This is quite exciting! We have a short window of time to finish our experiments before heading back to Indiana next week (we extended our stay here due to these problems - thank you to NSF, CPS, and UMIAQ for accommodating this request!). <br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhp6TzjBCv-GlthPVEdUkHP9lKEaK59PYb0Jr_ylbJEK6oFMkGOpdYuKnY1Ppiiu-ygRP8tsaLxVfoZQPd-bwWKBlJBBh_5UqDuW512dtB7pkz-kCBmk3noGJCcSd4-8dnf94VSxV7KRYQ/s1600/IMG_1687.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhp6TzjBCv-GlthPVEdUkHP9lKEaK59PYb0Jr_ylbJEK6oFMkGOpdYuKnY1Ppiiu-ygRP8tsaLxVfoZQPd-bwWKBlJBBh_5UqDuW512dtB7pkz-kCBmk3noGJCcSd4-8dnf94VSxV7KRYQ/s640/IMG_1687.JPG" width="425" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Several tries and we have a functioning turbo pump controller! Notice all of the "Must Load" Goldstreak labels! (Alaska Airlines' Goldstreak service means that your package will fly on the next passenger flight, which means the fastest possible service)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwzf27uxyamxnqeoozODPGwfGl4W_u_Rphhn2jVOiEUYPnRbFOtOGImMYPn_aJ4rtFV3OxMbB266QHN7Djt8piWg53j2Q4Nt1iXsQOS3ensZYlredFfX6CuaMxS5ulMaAKbn9XiScz8-Q/s1600/IMG_1688.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwzf27uxyamxnqeoozODPGwfGl4W_u_Rphhn2jVOiEUYPnRbFOtOGImMYPn_aJ4rtFV3OxMbB266QHN7Djt8piWg53j2Q4Nt1iXsQOS3ensZYlredFfX6CuaMxS5ulMaAKbn9XiScz8-Q/s640/IMG_1688.JPG" width="426" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">The mass spec is collecting data!!!</td></tr>
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We have many people to thank for this effort! First, thank you to Ken Murphy, Jeff Morgan, and Dave Vincent at Agilent Technologies for sending the most recent V81 controller that is now my best friend! Thank you to Prof. Bill Simpson and Steve Walsh at the University of Alaska, Fairbanks for receiving several FedEx priority overnight packages and taking them to Alaska Airlines for Goldstreak service to Barrow. Thank you to Prof. Kim Prather and Lindsay Hatch at the University of California, San Diego for sending us a spare V70 controller "just in case"! Thank you to Dave Tanner and Prof. Greg Huey at Georgia Tech for searching their lab for spare controllers and confirming my "diagnosis"! And, thank you to our advisor Prof. Paul Shepson for trusting us and letting us not give up and stay longer! We are so very thankful and feel very blessed for the everyone's help in making this field work a success. Field research is definitely a team effort. Thank you!!<br />
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In the previous post, I mentioned that the wind was picking up yesterday morning on the sea ice. By the time I picked up the Goldstreak packages and we headed out to the lab (~10:30 PM), wind speeds were averaging ~30 mph with even higher wind gusts. This meant low visibility, huge snow drifts on the road, and leaning into the wind as we walked across the drifting snow on the tundra to the lab! Kyle, who usually has trouble cooling his gas chromatograph oven to low temperatures, was having trouble warming the oven to higher temperatures because of the high winds keeping his blower valve open! So, it was an interesting (yet "normal") night of troubleshooting! We parked even further than normal away from the lab because we were worried about the truck getting stuck in the large drifts that were forming at our normal parking spot on the side of the road. Luckily the truck got us back to our hut when we finished up in the lab - of course, the truck then wouldn't start in the morning due to snow/ice accumulation because we drove through many several-foot-high snow drifts on the way home! But, we have working instruments and are happy "campers"! (Actually, our hut was compared to a fishing camp by our most recent visitors!) We have been blessed with an amazingly successful field campaign with lots of data, and these extra days will be the "icing on the cake" at Cake Eater Lab!<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiYuXVmtVCTe8xb7vUwqWch2s62Ex0BAgXt67H9WdEWvtG60v6w2Rr8fywNdAReY2BFG9-Vk5Oy42vgBEQpjVnEEE4TX2Ajs_NNbmYyIykRozwkX7s0U-h_cTzcTSs_sezRmrAIXNYTCo/s1600/IMG_1685.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiYuXVmtVCTe8xb7vUwqWch2s62Ex0BAgXt67H9WdEWvtG60v6w2Rr8fywNdAReY2BFG9-Vk5Oy42vgBEQpjVnEEE4TX2Ajs_NNbmYyIykRozwkX7s0U-h_cTzcTSs_sezRmrAIXNYTCo/s640/IMG_1685.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Low visibility at the lab due to blowing snow</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwmFA-EzQ_0VDSVMZ3yFtfcu6NfAHZAj9vQk4xizTKGVNVycexm3ziwjXP4M1op84KX9FGZhHXOXGpsIqPsRA3CtU9on0MYqeC7YPxKwku6tvTefd9ai7sXJmUlBlqn85_SvTafwZJ9uI/s1600/IMG_1693.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwmFA-EzQ_0VDSVMZ3yFtfcu6NfAHZAj9vQk4xizTKGVNVycexm3ziwjXP4M1op84KX9FGZhHXOXGpsIqPsRA3CtU9on0MYqeC7YPxKwku6tvTefd9ai7sXJmUlBlqn85_SvTafwZJ9uI/s640/IMG_1693.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">An interesting break in the clouds outside of the lab at ~midnight </td></tr>
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Due to late sunsets (~10 PM now), Kyle has been doing nighttime calibrations and to catch the start of business on the east coast, I've been trading positions with him and heading out to the lab at 5 AM when he goes to sleep. An advantage of this horrible schedule is that we get to witness the most beautiful times of the day out on the tundra - sunset, darkness, and sunrise. Here are a few photos from recent days. <br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_NpsF3zfaqFERlisxuG0UUSQMskB3dOGaOunkh9HFCTe8vmBVvPfn0AS2OA-QN9Iq-WrYfIVddPm2kDrMGFFslCQyO69eiVn6cb65tDwQt3mGaEzObCp3ipfjeO5jLPFWrB5wiXwyC0A/s1600/IMG_1652.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_NpsF3zfaqFERlisxuG0UUSQMskB3dOGaOunkh9HFCTe8vmBVvPfn0AS2OA-QN9Iq-WrYfIVddPm2kDrMGFFslCQyO69eiVn6cb65tDwQt3mGaEzObCp3ipfjeO5jLPFWrB5wiXwyC0A/s640/IMG_1652.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Flare at the gas drilling station out on Cake Eater Rd.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhj2w9VDD0oIMeJuoOp7xI9Ftll6TvmaLrlTZ1PtheipLE-WOxZrA5bdxgsZsq2EEYn4Gb6T1Mn6mOP9Tbp3cwiogcrtGeIh11-fy25hbqf-d-9xDa3xe2tcK7Owl2nvqfDh-dzM-eX8M4/s1600/IMG_1654.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhj2w9VDD0oIMeJuoOp7xI9Ftll6TvmaLrlTZ1PtheipLE-WOxZrA5bdxgsZsq2EEYn4Gb6T1Mn6mOP9Tbp3cwiogcrtGeIh11-fy25hbqf-d-9xDa3xe2tcK7Owl2nvqfDh-dzM-eX8M4/s640/IMG_1654.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Twilight out on the tundra</td></tr>
</tbody></table>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4m6JkTnKWsTz_YcGNZL-g38OcXiXFV9QU3Teqpq4sFJPXjDntzzzjezS3C3kTo82wOOk7aiXjeISIuSx7sfzunmPTVAEUyqti4Mwd1Lq6HuUN8KPm7kqXxj0MpTcoRXRisEoSfIe3ulg/s1600/IMG_1658.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4m6JkTnKWsTz_YcGNZL-g38OcXiXFV9QU3Teqpq4sFJPXjDntzzzjezS3C3kTo82wOOk7aiXjeISIuSx7sfzunmPTVAEUyqti4Mwd1Lq6HuUN8KPm7kqXxj0MpTcoRXRisEoSfIe3ulg/s640/IMG_1658.JPG" width="426" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Sunrise at Cake Eater Lab</td></tr>
</tbody></table>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-39357493533289370062012-04-06T12:12:00.000-08:002012-04-07T21:57:17.820-08:00The True Meaning of Wind & ColdYesterday morning our outreach videographer (Derek Hallquist, <a href="http://www.grpvt.com/" target="_blank">Green River Pictures</a>) and I (Kerri) snowmobiled out on the sea ice with our bear guard Justin. We followed whaling trails in search of the lead (open water). After a bit of ride and some confusion, Justin realized that the trail stopped where there had been open water the previous day. Overnight a huge amount of ice had run into the shorefast ice. We could see a huge mass of ice floating by in the distance, so Derek set up his camera for a time lapse. Justin told us that we needed to keep a careful eye on the ice in front of us because it could change instantly if the floating ice mass in the distance ran into this ice. This was a dangerous situation, particularly as the wind was picking up, so we needed to hurry to shoot the video and head back to safer ice. Despite all of our down clothing, Derek and I managed to get extremely cold during our trip due to the wind chill out on the exposed sea ice. Many folks have asked if I am cold (since I get cold frequently in the lower 48!). However, except for during snow chamber experiments when my hands have gotten cold, I have been pretty warm up here...until yesterday. It was pretty brutal trying to take photos and video in the cold. I managed to take a few photos (with gloves on) before my hands were in pain. You don't go through a chilled stage with the cold here - you go straight to pain! Derek described it as feeling like his hands were in boiling water. Unfortunately, he did end up with some frostbite on his cheek, but I expect that the video will be great! Our snowmobile ride back back to NARL was quite something - riding ~50 mph into ~30 mph winds on the ice. We were cold!!!<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOQkS6FGsgRI5q4uZHNTwCx7WmwMhkBNVj3E9g0HSpZwIXi7vrORPuoTc3wDU9_f8X7oX_TbG2KBK9-w9VBGwTUHKO3BA9e51pFy02SkRSKNEB4jZPoeBJ1vjRAj4wOX6kXAWLST-z1FM/s1600/IMG_1668.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOQkS6FGsgRI5q4uZHNTwCx7WmwMhkBNVj3E9g0HSpZwIXi7vrORPuoTc3wDU9_f8X7oX_TbG2KBK9-w9VBGwTUHKO3BA9e51pFy02SkRSKNEB4jZPoeBJ1vjRAj4wOX6kXAWLST-z1FM/s640/IMG_1668.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Derek's camera set up for a time lapse video of ice floating in the distance.</td></tr>
</tbody></table>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtYxlnpRtm-_DO7hV2SixR6b7KWDheBRApLaoDQbIXXjpIEX1TQ1FF3JB4_CllOPOhd_Yyt9lSDIQDhss-6tfHABDm1hOpisZ5csd47ww6v0TdR1UwmZplbj3EAjAM_vxdLjGjjFJchfU/s1600/IMG_1673.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtYxlnpRtm-_DO7hV2SixR6b7KWDheBRApLaoDQbIXXjpIEX1TQ1FF3JB4_CllOPOhd_Yyt9lSDIQDhss-6tfHABDm1hOpisZ5csd47ww6v0TdR1UwmZplbj3EAjAM_vxdLjGjjFJchfU/s640/IMG_1673.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Derek interviewing our bear guard Justin. Notice the flying camera strap on the left - it was ridiculously windy! My job as the "camera assistant" was to try to keep the fuzzy mic out of the wind!</td></tr>
</tbody></table>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNNOyc-Cok-_mrdFBy52qJCCxyCr6IA2PLlbeSZld2JRULFMsvRp4L5T5u4xd7Twi7Bj2Ifdch1GG0k2kAn8gAb7q7ypkrvcjjT-UJOYtjT6K9hRgEdCmaFEYbc43ynESA4zKyQmAkjHg/s1600/IMG_1676.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNNOyc-Cok-_mrdFBy52qJCCxyCr6IA2PLlbeSZld2JRULFMsvRp4L5T5u4xd7Twi7Bj2Ifdch1GG0k2kAn8gAb7q7ypkrvcjjT-UJOYtjT6K9hRgEdCmaFEYbc43ynESA4zKyQmAkjHg/s640/IMG_1676.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Our awesome UMIAQ bear guard for the day - Justin</td></tr>
</tbody></table>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjngS0-FEw9HA3iTkfXk7bZsAzWuvH56ms9CrFuvP5qq_3x81drBTDSjfFdi7vy7BfUtsPMv9cZ_DSB-5KSepOFTlcVCSmKU-m88izkPkV-buwUO_SmmM1cq-ue7NUWzZD_f69sNMZKUBQ/s1600/IMG_1679.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjngS0-FEw9HA3iTkfXk7bZsAzWuvH56ms9CrFuvP5qq_3x81drBTDSjfFdi7vy7BfUtsPMv9cZ_DSB-5KSepOFTlcVCSmKU-m88izkPkV-buwUO_SmmM1cq-ue7NUWzZD_f69sNMZKUBQ/s640/IMG_1679.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Derek checking out the snowmobile trail through the pressure ridge. The whaling crews starting breaking trail in February, and whaling will start very soon.</td></tr>
</tbody></table>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-71708342149675623642012-04-04T09:03:00.000-08:002012-04-04T09:03:22.879-08:00Flying ALAR to FairbanksMonday morning Professor and pilot Paul Shepson and aircraft mechanic Brian Stirm (Purdue Univ.) flew ALAR out of Barrow, heading back toward Indiana. Johannes, Stefan, Kyle, and I (Kerri) ("research flight crew" from the Univ. of Heidelberg and Purdue Univ.) wished them the best of luck and watched them fly off into the distance. Their first stop was Fairbanks, Alaska, from which they sent us some beautiful photographs of their flight over the Brooks Range!<br />
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<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-81316772592345647542012-04-02T06:16:00.002-08:002012-04-02T06:16:29.629-08:00Sunlight on the tundra<!--[if gte mso 9]><xml>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%;">Out at CARL (Cake Eater Atmospheric Research Laboratory), we have a fine array of instruments measuring
all sorts of things, from blowing snow to sunlight. Here’s a brief description
on how we set these instruments up and what they actually do. (Post by graduate student Melinda Webster, Univ. of Washington)</span></div>
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<br /></div>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%;">To begin, we had to do some manual labor. We dug snow pits
for placing two towers in to provide them with stability in the
chance that it becomes really, really windy. We needed a place with level
ground so that the anemometers (the instruments that measure wind speed and
direction) wouldn’t give us weird measurements. You can imagine having a
pinwheel facing the wind works better than facing sideways to the wind. Our
snow pits ended up being ~70 centimeters deep. Here’s our dig:<span style="mso-spacerun: yes;"> </span></span></div>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%;">After digging, we set up the actual towers themselves. After
bolts and pieces, running wires through freezing metal tubes, testing the
instruments with success, we were good to go! Once we had the towers up and
standing, we piled snow back into the pits and set up wires bolted between the
towers and the ground (again, for stability). </span></div>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%;">Closest to CARL is our radiometer tower which measures the
sun’s energy each day. It tells us how much shortwave (Gamma, Xrays, UV) and
longwave (Infrared, Microwaves, Radiowaves) radiation reaches the Earth’s
surface. This is a great way to count the number of sunny and cloudy days,
which can then be compared to the daily changes in air temperature and air
chemistry. </span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEievxNpbNDwUu8rXwIJ0rKsJvNmrR0JC0n-bWO9L4UlGiIViK2rxPVgi0QuYuEJcL4RZeRSBRd1gnY1L-M98DW_8_A6R7IdNkgGBzd60kuSi_-b3-Q5iL4foCh23A1aWL_5KdDOBHg_eC4/s1600/Melinda3.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="110" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEievxNpbNDwUu8rXwIJ0rKsJvNmrR0JC0n-bWO9L4UlGiIViK2rxPVgi0QuYuEJcL4RZeRSBRd1gnY1L-M98DW_8_A6R7IdNkgGBzd60kuSi_-b3-Q5iL4foCh23A1aWL_5KdDOBHg_eC4/s640/Melinda3.png" width="640" /></a></div>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%;">The second tower is the meteorological station.
It tells us four very useful things: air temperature, humidity, wind speed, and
wind direction. The tower provides continuous information on the local
atmospheric changes, like if it’s getting windier and colder, or warmer or
calmer. It also provides a great comparison for other meteorological data
measured around Barrow. </span></div>
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<span style="font-family: "Times New Roman"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-US;">We also compare these measurements to data from
the<a href="" name="_GoBack"></a> Surface Velocity Profiler (SVP) buoys and
Thermocrons. The SVP buoys measure air temperature and air pressure at hourly
intervals. The Thermocrons are these thumb-sized devices which measure surface
temperature every 5 minutes.<span style="mso-spacerun: yes;"> </span>They are
used to validate satellite-derived surface temperatures.</span><div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6luBFazncVDUNK6t9WvDMnEF1QZSrcJiFvUG1-P0Lbu2Dkb9erwpQxtxo5Hh0X7fzRTpsdAWtOHV-ghihgk4L1mJKFaimfn3v0VJAMwf2Nnpd7Ks7LTI85V6TkxzCWT9_yFyb0Aley-s/s1600/Melinda4.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="428" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6luBFazncVDUNK6t9WvDMnEF1QZSrcJiFvUG1-P0Lbu2Dkb9erwpQxtxo5Hh0X7fzRTpsdAWtOHV-ghihgk4L1mJKFaimfn3v0VJAMwf2Nnpd7Ks7LTI85V6TkxzCWT9_yFyb0Aley-s/s640/Melinda4.jpg" width="640" /></a></div>
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<span style="font-family: "Times New Roman"; font-size: 12pt; line-height: 115%;"><span>Thank you to graduate student Melinda Webster (Univ. of Washington) for this great post!</span></span></div>
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<br /></div>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-33763509693357447042012-03-30T18:02:00.000-08:002012-04-01T09:33:07.873-08:00Out On The Ice (OOTI)<br />
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<span lang="EN-CA">The Canadians have landed on the ice to
measure mercury and ozone! Well that is not entirely true, our ice
chemistry team consists of 3 Canucks - Sandy Steffen (author here), Ralf Staebler and John
Deary (all veterans to Arctic research)- 1 Swiss who works in the US, Daniel
Obrist (newbie to the Arctic) and 1 ‘Merican, Chris Moore (he says it like that
not I). The 3 Canadians are from
Environment Canada in </span><span lang="EN-CA">Toronto</span><span lang="EN-CA">, </span><span lang="EN-CA">Ontario</span><span lang="EN-CA"> and the “other” 2 are from Desert Research Institute, in </span><span lang="EN-CA">Reno</span><span lang="EN-CA"> </span><span lang="EN-CA">Nevada</span><span lang="EN-CA">.</span></div>
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<span lang="EN-CA">We arrived in Barrow March 10<sup>th</sup>
and it took us almost a whole week to find our equipment, put it together and
then deploy it to the ice. We take our
measurement instruments on sleds and set them up about 2.5 kilometres out on
the ice. </span></div>
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZAKfyGE1XMWhciGVSKhwGJzrNOkQYIvnpbVHl1pjvEjlZYRDzBnjKziuh5rVWDcKbv7_v5li60aTgaiglIgsn-OkoX6lWKwO_Ro4vL2vrcr-woxbwRTqudyCFzy_W3fGmJWeljAtJ7fc/s1600/Steffen+blog+photo+1.JPG" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZAKfyGE1XMWhciGVSKhwGJzrNOkQYIvnpbVHl1pjvEjlZYRDzBnjKziuh5rVWDcKbv7_v5li60aTgaiglIgsn-OkoX6lWKwO_Ro4vL2vrcr-woxbwRTqudyCFzy_W3fGmJWeljAtJ7fc/s640/Steffen+blog+photo+1.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Taking our instruments out to the site - It's a rough ride for our delicate instruments!</td></tr>
</tbody></table>
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<span lang="EN-CA">The goal of our project is to understand
how the changes in the </span><span lang="EN-CA">Arctic Ocean</span><span lang="EN-CA"> sea ice affect the chemistry in the overlying air. We do this by measuring mercury, ozone and a
suite of meteorological information in order to assess how these chemicals
behave over the sea ice. We also are
making measurements at the tundra site in order to observe the differences
between the levels of mercury and ozone inland and on the ice.</span></div>
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<span lang="EN-CA">As you may know, in the Arctic spring both
mercury and ozone disappear from the air as a result of the sea salts, sunlight
and cold temperatures. The ozone is
destroyed but the mercury doesn’t actually disappear but changes form and
deposits on the sea ice or snow. We are
trying to understand the impact of this deposition and how much mercury is
available to enter the </span><span lang="EN-CA">Arctic Ocean</span><span lang="EN-CA">. </span></div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnry3SVspAr0vZQ14A-iaQPlBt2iZWUNpntY82lVJORlPTuCJhHdr99xuMn5Z7a9puucUMLBt7RxCMXQpm2b4qSf77UcJckeztZKdHtj4QGkkT_aLejtqPpyTv6YX0VmPLNb-l6ugvLRQ/s1600/Steffen+blog+photo+2.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="424" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnry3SVspAr0vZQ14A-iaQPlBt2iZWUNpntY82lVJORlPTuCJhHdr99xuMn5Z7a9puucUMLBt7RxCMXQpm2b4qSf77UcJckeztZKdHtj4QGkkT_aLejtqPpyTv6YX0VmPLNb-l6ugvLRQ/s640/Steffen+blog+photo+2.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Setup of our instruments once we got everything going. On the left is the intake for mercury and on the right for the ozone. The mercury instrument requires 4kilowatts of power to run, so we have a generator on the site powering our equipment.</td></tr>
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<span lang="EN-CA">We did have one curious visitor to the site
which added some excitement to our day!
See photo below for a shot of said visitor high tailing it out of “OOTI-town”
when he realized we were there. Last
time we were in Barrow, this type of visitor took a bite out of my sample line
and a lick off a telescope; no taste testing this time!</span></div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1xSl5UcThAG4JCsJBbrOHRJ31i1BD2zqxMvkNf7R_NN_jhfxRt4OUTis68h0TNgs4GpRyC8lACdc4_cSg2oVd0PA9ON1fgN44yFSwmcRXW0T6zd_1w_jyiog4zzABOlowSJLbJ56DGFw/s1600/Steffen+blog+photo+3.JPG" imageanchor="1" style="clear: right; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="422" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1xSl5UcThAG4JCsJBbrOHRJ31i1BD2zqxMvkNf7R_NN_jhfxRt4OUTis68h0TNgs4GpRyC8lACdc4_cSg2oVd0PA9ON1fgN44yFSwmcRXW0T6zd_1w_jyiog4zzABOlowSJLbJ56DGFw/s640/Steffen+blog+photo+3.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Polar bear!</td></tr>
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<span lang="EN-CA">We have been making measurements for 2
weeks and will be ending soon with some super data to bring home. I love the </span><span lang="EN-CA">Arctic</span><span lang="EN-CA"> and all it has to offer
both in exciting science and wonderful scenery.
I have been working in the </span><span lang="EN-CA">Arctic</span><span lang="EN-CA"> for 16 years and never tire of it.
I recommend to everyone, that they get the chance to see this sort of
thing at least once in their life (see photo below).</span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGIxR_Y7rZjAJrNUklSMovMGaowAEPPr3z8JPoHBG_enRBGGmNJ8deX72lzQ36dIy-H_dgqLyYNPy5uDKh3OL0uWZ1Y_X6Hk1ZcciGQNfOJ7vqAymdROstEpo7sRdRqSTi5gElZbxRgO4/s1600/Steffen+blog+photo+4.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="424" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGIxR_Y7rZjAJrNUklSMovMGaowAEPPr3z8JPoHBG_enRBGGmNJ8deX72lzQ36dIy-H_dgqLyYNPy5uDKh3OL0uWZ1Y_X6Hk1ZcciGQNfOJ7vqAymdROstEpo7sRdRqSTi5gElZbxRgO4/s640/Steffen+blog+photo+4.JPG" width="640" /></a></div>
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<span lang="EN-CA">- Sandy Steffen (Environment Canada)</span></div>
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<span lang="EN-CA">Thank you Sandy for this great post! </span></div>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com2tag:blogger.com,1999:blog-1351790966541818119.post-2015064861999071872012-03-30T17:44:00.000-08:002012-03-30T17:44:22.368-08:00Visit to Cake Eater Lab<div style="margin-bottom: 0in;">
Kerri and Kyle (Purdue Univ.) claim that their life at
the Cake Eater Lab isn't exciting, but they are being modest! While at C.A.R.L. (Cake Eater Atmospheric Research Laboratory), I watched Kerri change the glass wool in the instrument halogen scrubber, take vertical profiles into the
snow with the mass spectrometer, and clean the instrument inlet. We used a SWE (snow
water equivalent probe) to bore a two inch diameter hole into the
snow pack and put the insulated inlet tube down into the hole! Kerri
constructed the insulated tube by nesting the regular teflon tube
inside a copper pipe, coating it with heat tape, and making an outer
layer of foam. We then used a fancy rigging of string and zip-ties to
suspend it at our desired height. :) Measurements were taken at several heights above the snow and into the hole in the snow to investigate halogen activation from the snowpack.
</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP3HRowUf3bjeoveUuS2a3IZjKD_Wx0lhRwLXv74FEJC0fuNuC_Vh3qy18D8suFw-Gngej8ikRmKQTAhw91b-hcO4mHLncYt23YCz6VXPr-mLLxSo1P_hZVsSuL5kUenHEQXwtnXwG-w8/s1600/IMG_1571.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP3HRowUf3bjeoveUuS2a3IZjKD_Wx0lhRwLXv74FEJC0fuNuC_Vh3qy18D8suFw-Gngej8ikRmKQTAhw91b-hcO4mHLncYt23YCz6VXPr-mLLxSo1P_hZVsSuL5kUenHEQXwtnXwG-w8/s640/IMG_1571.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate student Erin Gleason (Univ. of Alaska, Fairbanks) using the SWE probe to make a nice hole in the snow</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEit01tA__4cHYq3XpLLgr1EV4aOBqjvD73QrcNRipn2hyRrw7TFUzMSVTUXzUSb7QI6Pm2TRS-NeI6E4Q_i7G81c2fCUIU9G4ppVltKDoR1b9TeEx213XBzEIaUHnvw0U3q7BPJ-0gTtIY/s1600/IMG_1566.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEit01tA__4cHYq3XpLLgr1EV4aOBqjvD73QrcNRipn2hyRrw7TFUzMSVTUXzUSb7QI6Pm2TRS-NeI6E4Q_i7G81c2fCUIU9G4ppVltKDoR1b9TeEx213XBzEIaUHnvw0U3q7BPJ-0gTtIY/s640/IMG_1566.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Excited to be helping out at the Cake Eater Lab! (Graduate student Erin Gleason, Univ. of Alaska, Fairbanks)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi94-CL85cFuRho5fVIry14CCYoPaHu8B-hi6v9UrkYKbHYLiY7iVzuHsWHdsXPxIiiEgbbJ19Rgahn533pQTGDTFoMZ8nnzPRI-tHU1NTFHdxk3N6n26M-Tx6z0V7heEV_Ua2Cz2o8rX4/s1600/IMG_1576.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi94-CL85cFuRho5fVIry14CCYoPaHu8B-hi6v9UrkYKbHYLiY7iVzuHsWHdsXPxIiiEgbbJ19Rgahn533pQTGDTFoMZ8nnzPRI-tHU1NTFHdxk3N6n26M-Tx6z0V7heEV_Ua2Cz2o8rX4/s640/IMG_1576.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Measuring the height of the sampling inlet above the snow (Graduate student Erin Gleason, Univ. of Alaska, Fairbanks)</td></tr>
</tbody></table>
Thank you Erin for this great post and for helping us out at the lab!<br />
<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-64463969500590088562012-03-27T11:56:00.001-08:002012-03-27T11:56:56.727-08:00Student Questions from Kingsley, Pennsylvania!<b>Questions from Mr. Roger Thomas' 7th grade science class at Mountain View Jr./Sr. High School, Kingsley, Pennsylvania</b><br />
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<b>1. How are your emails transported (wired, line of sight radio, or satellite)?</b><br />
Emails and cell phone service are transmitted out of Barrow via satellite.<br />
<br />
<b>2. Why is it cold on Mt. Everest if heat rises?</b><br />
Warm air is buoyant, so it does rise (like you might observe in your house). However, pressure decreasing with increasing altitude (like up Mt. Everest). A parcel of air expands as it goes from higher to lower pressure (increasing altitude). When air expands, it cools. Therefore, temperature generally decreases with increasing altitude.<br />
<br />
<b>3. How often do you see the northern lights? What is your and everyone else's favorite color?</b><br />
From early to mid-March, we saw the northern lights, mostly green in color, nearly every night out at our lab on the tundra. Recently we haven't seen the northern lights that frequently. The days are getting much longer now (sunset at 9:19 PM tonight, compared to 5:25 PM when we first arrived in Barrow in February), and there have been fewer solar events recently. <br />
<b><br /></b><br />
<b>4. Do you work inside or outside more often? Do you go inside a lot when you work outside?</b><br />
When we are at our lab on the tundra, we spend most of our time inside where it is warm (~70<!--[if gte mso 9]><xml>
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<![endif]--><span style="font-family: "Times New Roman"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-US;">°</span>F). When we go outside, we make sure to put on our hats, gloves, snowpants, parka, etc. because wind chills often go down to ~-50<span style="font-family: "Times New Roman"; font-size: 12.0pt; mso-ansi-language: EN-US; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-US;">°</span>F!<br />
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<b>5. We see that you use electricity to power the warm water, your tools, and the town. Where is the electric generator located? What powers it (fuel source)?</b><br />
Natural gas from nearby gas fields is generally used to heat homes and generate electricity.<br />
<br />
<b>6. Has the engine of your plane ever frozen? Is it too cold for cell phones and i-pods?</b><br />
It is really important to keep the engines warm! When the engines are not running, electric heater blankets are placed around them to keep the engines warm. As for cell phones, cameras, and other devices with batteries, they work as long as you keep warming up the batteries. When we took snowmobiles onto the sea ice, I kept my camera battery inside my parka to keep it warm!<br />
<b><br /></b><br />
<b>7. Do you have protection in case any animals attack?</b><br />
When we go out onto the sea ice on snowmobiles, a <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGW952HRA_QjNvVqPb46VWYNwVWmsJWtuzydUj9JosZYguN3cO7XvFL8ddNcsQ2qi0_a9aYua5dtDxkZazfscCKj-viszPQVV6iJNFdaC1J57P_N2azBZGpWLxP0TgCwVp_xCte_Tj1vk/s1600/IMG_1543.JPG" target="_blank">bear guard</a> comes with us in case a polar bear might attack. However, often polar bears are scared away by the sound of snowmobiles or just gun shots in the air. Shooting a polar bear would be a last resort for protection.<br />
<br />
<b>8. Can you or the Eskimos go ice fishing, or is the ice too thick?</b><br />
Near the shore, the undeformed level ice is 5-6.5 feet thick! However, where there are pressure ridges (hills of sea ice rubble), the ice can be extremely thick (<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipJqNTqdWB8NZX3GIC-v1hKrGmNDaLsi3RzYeRwH1OJmDYWmlP9H4tlTlwx0zApR66JjtlIj9J-4MuuFj0nqWjbaC3ewSbji8gQG7lARNzfZ5u7S-QnzqfBodc6W1rlKm4ASD5HtKZlAE/s640/IMG_0146.JPG" target="_blank">see photos of the sea ice</a>)! We haven't seen anyone ice fishing. The main "fishing" activity here is whaling, which starts in April and is where sealskin boats are used to paddle through open water between patches of ice (<a href="http://shepsonbromex.blogspot.com/2012/02/learning-about-inupiat-whaling.html" target="_blank">see whaling post</a>). The US Naval Academy researchers took a video of the water below the sea ice, which you can <a href="http://usnapsp.blogspot.com/2012/03/under-ice-in-barrow-ak.html" target="_blank">watch at this link</a>!<br />
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Thank you to the students at Mountain View for great questions! We hope that you enjoy reading our research blog!<br />
<br />
<b>Announcement to other teachers: </b>Kyle and I leave Barrow on April 6th, so please send any remaining student questions ASAP if you'd like them answered while we're in Alaska! Thanks!<br />
<br />
<br />Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-50501209265012961362012-03-26T13:38:00.000-08:002012-03-26T13:38:01.552-08:00Adventures on the sea ice!Saturday Kyle and I had the adventure of a lifetime exploring the sea ice with our bear guard and scientist Dr. Tom Douglas (U.S. Army Cold Regions Research & Engineering Lab), graduate student Ross Lieb-Lappen (Dartmouth College), graduate student Melinda Webster (Univ. of Washington), and graduate student Erin Gleason (Univ. of Alaska, Fairbanks). We took the snowmobiles ~1 mile out onto the sea ice to measure and collect brinecicles - salty icicles that form below uplifted chunks of deep blue sea ice. Here are a collection of photos from our adventure!<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhC0Gp_BhU44xxOULL7GWQBGTZXd2mimitOKW3o9mBTpPXODL387U_l6kq3JxqT5Poec1Srs056BaTcI9ru-GPjhyphenhyphen-07VPG00ERMbpDk_2_KCvA6_ZF3Z7xUx2jazyYi-ahyphenhyphencqCMLXMBsA/s1600/IMG_1509.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhC0Gp_BhU44xxOULL7GWQBGTZXd2mimitOKW3o9mBTpPXODL387U_l6kq3JxqT5Poec1Srs056BaTcI9ru-GPjhyphenhyphen-07VPG00ERMbpDk_2_KCvA6_ZF3Z7xUx2jazyYi-ahyphenhyphencqCMLXMBsA/s640/IMG_1509.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate students Kyle Custard (Purdue Univ.) and Erin Gleason (Univ. of Alaska, Fairbanks) arriving at the sampling site</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipJqNTqdWB8NZX3GIC-v1hKrGmNDaLsi3RzYeRwH1OJmDYWmlP9H4tlTlwx0zApR66JjtlIj9J-4MuuFj0nqWjbaC3ewSbji8gQG7lARNzfZ5u7S-QnzqfBodc6W1rlKm4ASD5HtKZlAE/s1600/IMG_0146.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipJqNTqdWB8NZX3GIC-v1hKrGmNDaLsi3RzYeRwH1OJmDYWmlP9H4tlTlwx0zApR66JjtlIj9J-4MuuFj0nqWjbaC3ewSbji8gQG7lARNzfZ5u7S-QnzqfBodc6W1rlKm4ASD5HtKZlAE/s640/IMG_0146.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Exploring the sea ice! (photo courtesy of Kyle Custard)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGW952HRA_QjNvVqPb46VWYNwVWmsJWtuzydUj9JosZYguN3cO7XvFL8ddNcsQ2qi0_a9aYua5dtDxkZazfscCKj-viszPQVV6iJNFdaC1J57P_N2azBZGpWLxP0TgCwVp_xCte_Tj1vk/s1600/IMG_1543.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGW952HRA_QjNvVqPb46VWYNwVWmsJWtuzydUj9JosZYguN3cO7XvFL8ddNcsQ2qi0_a9aYua5dtDxkZazfscCKj-viszPQVV6iJNFdaC1J57P_N2azBZGpWLxP0TgCwVp_xCte_Tj1vk/s640/IMG_1543.JPG" width="426" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Watching for polar bears - our bear guard Dr. Tom Douglas (U.S. Army Cold Regions Research & Engineering Lab)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinotpJoBBORrApTohWJpL5BcgWXAJ_Ozwux3w7zSHdkfC8K1cYVVAVFla7WzCcWnpCRmU6llsX5u5Za9Ob88MIs4z6yNsc46XZC2vc8HUlGmjKrfFtBQbPe0POVJThTcuwTX42JoeBQt8/s1600/IMG_0145.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinotpJoBBORrApTohWJpL5BcgWXAJ_Ozwux3w7zSHdkfC8K1cYVVAVFla7WzCcWnpCRmU6llsX5u5Za9Ob88MIs4z6yNsc46XZC2vc8HUlGmjKrfFtBQbPe0POVJThTcuwTX42JoeBQt8/s640/IMG_0145.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate student Ross Lieb-Lappen (Dartmouth College) exploring the sea ice with clouds over the lead (open seawater) in the background (photo courtesy of Kyle Custard)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixMgzj17XS1IqpdhM1pZmUQFD0-zimnrw4QbmTU20DDjNEPwX0G79gvztzDwe8jNteysnEaEPM4O6vH4LdHEHyR_90Yxfq1V4cU7pV53M0t8x9ewH8q6sC7ioldJAo4KvOrwpgE6YrgEM/s1600/IMG_1536.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixMgzj17XS1IqpdhM1pZmUQFD0-zimnrw4QbmTU20DDjNEPwX0G79gvztzDwe8jNteysnEaEPM4O6vH4LdHEHyR_90Yxfq1V4cU7pV53M0t8x9ewH8q6sC7ioldJAo4KvOrwpgE6YrgEM/s640/IMG_1536.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate student Kyle Custard (Purdue Univ.) exploring the sea ice</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3sP9wZ_9rKpbICyma50yG8o1NGkrUtxeo0L998TPgXNz-myxgp8NmsWkhS9EvCd9muWyDXBHCMzu5ZFtTrmkAeV7zi40JVQQBzdS2429f64Cr6RO1NGAzz57nFZ8qSmh7-7vBNVG6Ymw/s1600/IMG_0160.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3sP9wZ_9rKpbICyma50yG8o1NGkrUtxeo0L998TPgXNz-myxgp8NmsWkhS9EvCd9muWyDXBHCMzu5ZFtTrmkAeV7zi40JVQQBzdS2429f64Cr6RO1NGAzz57nFZ8qSmh7-7vBNVG6Ymw/s640/IMG_0160.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Brinecicles! (photo courtesy of Kyle Custard)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirtXNr5q3R8EHjD7r_fDSX8kURjNbXXEA2deOLijXvnGiJvlKnjosdxIpLKywL2HHJGaqshLTkS-DtmNgQJrRIFSFSSTeYPVNUFkGALK6TN25_LzBFjDueNiXFhRuN0MvsNFWU3K7y9Gs/s1600/IMG_1533.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirtXNr5q3R8EHjD7r_fDSX8kURjNbXXEA2deOLijXvnGiJvlKnjosdxIpLKywL2HHJGaqshLTkS-DtmNgQJrRIFSFSSTeYPVNUFkGALK6TN25_LzBFjDueNiXFhRuN0MvsNFWU3K7y9Gs/s640/IMG_1533.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate student Ross Lieb-Lappen (Dartmouth College) collecting brinecicles</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9PDO_Gvb7gIenxLRMnuAeyINmxX2fgJe_vInb_STCSr7YfxVti46l2RQ_ibWfADo-aORIY7HbNuH0R1RkvhJwaLSb0wDwihZM55PnrMAQ2k1_dRa4SiH8PLewolsimT2Qp0iPbYaYLBI/s1600/IMG_1559.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9PDO_Gvb7gIenxLRMnuAeyINmxX2fgJe_vInb_STCSr7YfxVti46l2RQ_ibWfADo-aORIY7HbNuH0R1RkvhJwaLSb0wDwihZM55PnrMAQ2k1_dRa4SiH8PLewolsimT2Qp0iPbYaYLBI/s640/IMG_1559.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate student Ross Lieb-Lappen (Dartmouth College) testing the salinity of the brinecicles!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRMewWY7wpBLinN7hyIQHijma2kqpzvVU3uyeH1GwGcora1ftUHfhtsK3AfiXsDOeHFdaW8BuZgueQZiEVfexZeWOA2CkYbiUTV5UN0_3H5q4L1blxVa3HIH-d57G1kOna_hMNs8zstcg/s1600/IMG_1548.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRMewWY7wpBLinN7hyIQHijma2kqpzvVU3uyeH1GwGcora1ftUHfhtsK3AfiXsDOeHFdaW8BuZgueQZiEVfexZeWOA2CkYbiUTV5UN0_3H5q4L1blxVa3HIH-d57G1kOna_hMNs8zstcg/s640/IMG_1548.JPG" width="426" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Graduate students Kyle Custard (Purdue Univ.) and Ross Lieb-Lappen (Dartmouth College) drilling an ice core</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdTQ-3TjFCpu7LaBGbo-wtrur-Xd8pNSp9FrMqF3cdoHI8nR5abNmKYaevPIrHP9uYzmDm0ZOiVsTaGNL6waY8_uCj8Gu0k5bI75c9mGBjx1_ZfVd3h5kYYP0lvRMXBIMAF70yqfkLUbI/s1600/IMG_1537.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdTQ-3TjFCpu7LaBGbo-wtrur-Xd8pNSp9FrMqF3cdoHI8nR5abNmKYaevPIrHP9uYzmDm0ZOiVsTaGNL6waY8_uCj8Gu0k5bI75c9mGBjx1_ZfVd3h5kYYP0lvRMXBIMAF70yqfkLUbI/s640/IMG_1537.JPG" width="425" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Sun dog in the sky from the refraction of light off ice crystals aloft</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-CVxuNogTWjiLrEz9MHgKwEVqFR4rpH05DqsGEm_XDljwTWWc3yQeiCUiPlqudRa-CEFJ_xURfveCTq9rBO_DxF0egEfwcTwGrw3-lnZINveRi-FNN6DlgspSY4B3vJU77cTg-XH_Ud8/s1600/IMG_1560.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-CVxuNogTWjiLrEz9MHgKwEVqFR4rpH05DqsGEm_XDljwTWWc3yQeiCUiPlqudRa-CEFJ_xURfveCTq9rBO_DxF0egEfwcTwGrw3-lnZINveRi-FNN6DlgspSY4B3vJU77cTg-XH_Ud8/s640/IMG_1560.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Polar bear tracks!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRCHv6ooh5oSQb8WC38FIoshKHTbXE_af6_eqp9ez8rRpb0eBvdzfVIIIQt3Wbjz7v3DJXEEAXBJrApmXBVIFt5SA8L7rcXOMD9nKU4Xa01R9URYCkY96WAxO_CSnQFy51ccLtAwPzWsw/s1600/IMG_1561.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRCHv6ooh5oSQb8WC38FIoshKHTbXE_af6_eqp9ez8rRpb0eBvdzfVIIIQt3Wbjz7v3DJXEEAXBJrApmXBVIFt5SA8L7rcXOMD9nKU4Xa01R9URYCkY96WAxO_CSnQFy51ccLtAwPzWsw/s640/IMG_1561.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Wandering polar bear tracks</td></tr>
</tbody></table>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com1tag:blogger.com,1999:blog-1351790966541818119.post-41366093221736629862012-03-25T13:05:00.000-08:002012-04-05T09:25:15.480-08:00Geezer Posting (written by Prof. Paul Shepson)<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvgU7afJh4mBEpxABZGyzriYmzk0Dy7dsAz1yTSczK6jl6pn6LdRiXly47ZuzYneTZanRqQ98jLBP_aOg9FKoTQ_wXO1T-2XA9yduwNLJpnClPfpKh18_zYbhdD6FHYn5XwQItCnBwA1g/s1600/Geezer1.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvgU7afJh4mBEpxABZGyzriYmzk0Dy7dsAz1yTSczK6jl6pn6LdRiXly47ZuzYneTZanRqQ98jLBP_aOg9FKoTQ_wXO1T-2XA9yduwNLJpnClPfpKh18_zYbhdD6FHYn5XwQItCnBwA1g/s400/Geezer1.jpg" width="400" /></a></div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9tmk-fjBavdK4rHqu90dnKgZAKBbasrIsuozi0qP14T_WhPpDjGfuEAvQ210n0xh361EnznR41ODPzFbq5R3J8DlmMAJQBh0PqUnYqSoe2PKAyuPw4pzEXDN6X1QLhXmoOks1x5hQZg8/s1600/IMG_0306.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9tmk-fjBavdK4rHqu90dnKgZAKBbasrIsuozi0qP14T_WhPpDjGfuEAvQ210n0xh361EnznR41ODPzFbq5R3J8DlmMAJQBh0PqUnYqSoe2PKAyuPw4pzEXDN6X1QLhXmoOks1x5hQZg8/s400/IMG_0306.JPG" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Kerri loading samples into the snow chamber</td></tr>
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Things are going very well up here in Barrow! Kyle and Kerri are working like lunatics; not
sure I have ever seen anything like it.
But I like it! Warms my heart! They
have been doing cool snow chamber experiments, and getting great data on the
tundra, where there seems to be a lot of chemistry action. And who doesn’t like good chemistry!? Shown to the right is a pic of Kyle in his natural
habitat. On that day, March 23, they did
a snow chamber experiment with snow from the sea ice, provided by the venerable
Dr. Tom Douglas (U.S. Army Cold Regions Research Lab). Thanks Tom! Shown is a picture of Kerri loading up
and sampling from the chamber. It was
very cold!</div>
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The flights have also been going great. A couple days ago the “Barrow Lead” (a long
thin crack in the ice, along which the Bowhead whales migrate. The Inupiat eskimos stand at the lead edge on
the ice, to hunt the whales. You can
read about this through the great book, <a href="http://www.peterlourie.com/books/WhalingSeason.htm" target="_blank">“Whaling Season”, by Peter Lourie</a>) opened up. We flew a couple times up to
the lead edge, and got some great pics.
The University of Heidelberg MAX-DOAS allows us to sample the air over the lead (for
BrO) without having to fly over it! We
just fly up to the edge with the MAX-DOAS camera pointing forward, and it can
see several kms forward of the airplane.
Doing this at multiple altitudes allows us to get vertical profiles over
the lead. Now, all we need is for the
lead to freeze over, and we’ll get some frost flowers, so we can test the
impact of frost flowers on bromine activation.
For those who want to know about frost flowers, I like the paper by
Alvarez-Aviles in JGR in 2008 (<a href="http://www.agu.org/pubs/crossref/2008/2008JD010277.shtml" target="_blank"><span style="font-family: AdvTT5843c571; font-size: 9pt;">JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 113,D21304, doi:10.1029/2008JD010277, 2008</span></a>).
See below some pics of the lead. “Wish you were here!”</div>
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- Professor Paul Shepson (Purdue University)</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUtk98MPGi4I9lpaXN2JXv2eTgVUUe9VD70rCJ7IEKgqfZlrqv9gnfDuXW9eOG21yhusWoOnhsf7Nrcj8RaQbkHu1c6lxUESfPkGbRfTuleBMeOhjpL_Fa5y7N4YJMjZvFjVu1KtgL5Ms/s1600/Geezer4.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUtk98MPGi4I9lpaXN2JXv2eTgVUUe9VD70rCJ7IEKgqfZlrqv9gnfDuXW9eOG21yhusWoOnhsf7Nrcj8RaQbkHu1c6lxUESfPkGbRfTuleBMeOhjpL_Fa5y7N4YJMjZvFjVu1KtgL5Ms/s640/Geezer4.jpg" width="640" /></a></div>
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</div>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-30450247455297442632012-03-22T23:22:00.000-08:002012-03-22T23:22:57.770-08:00Flying over sea ice!<br />
Today started with a beautiful sunrise at the Cake Eater Lab...<br />
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<tr><td class="tr-caption" style="text-align: center;">Photo courtesy of graduate student Stephan General (Univ. of Heidelberg)</td></tr>
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...Which was followed by an absolutely amazing flight with Professor Paul Shepson!<br />
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<tr><td class="tr-caption" style="text-align: center;">Take-off! (photo courtesy of graduate student Stephan General (Univ. of Heidelberg))</td></tr>
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Several leads (open water channels) have opened up to the west of Barrow! Now BROMEX is in full swing! We are investigating the impacts of these openings in the sea ice on the atmosphere.<br />
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<tr><td class="tr-caption" style="text-align: center;">Flying over NARL (former Navy Arctic Research Lab)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Cake Eater Lab!</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Two happy scientists! (Post-doc Dr. Kerri Pratt and pilot Prof. Paul Shepson, Purdue Univ.)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Excited after the flight! (Post-doc Dr. Kerri Pratt, Purdue Univ., photo courtesy of graduate student Stephan General (Univ. of Heidelberg))</td></tr>
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</div>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com2tag:blogger.com,1999:blog-1351790966541818119.post-74229194827198021312012-03-21T22:07:00.000-08:002012-03-21T22:10:52.948-08:003rd grade on the tundra!Yesterday Ms. Jenn Wallace's 3rd grade class from the Fred Ipalook Elementary School (Barrow, Alaska) took a field trip to visit us on the tundra at the Cake Eater Lab! The students learned about snow, meteorology, and air sampling. One of their favorite activities though was running in and out of snow pits! The field trip was organized by graduate student Ross Lieb-Lappen (Dartmouth College) with help from graduate students Melinda Webster (University of Washington) and Erin Gleason (University of Alaska, Fairbanks)! We all had a lot of fun with the kids!<br />
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<tr><td class="tr-caption" style="text-align: center;">Learning about the temperature buoys from graduate student Melinda Webster (Univ. of Washington)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Learning about measuring wind speed and temperature from graduate student Melinda Webster (Univ. of Washington)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Learning about snow chamber experiments from graduate student Kyle Custard (Purdue University)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Learning about our snow chamber shelf and going to visit the "whooshing" sound of the mass spectrometer inlet with post-doc Dr. Kerri Pratt (Purdue University)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Learning about the flow tube air sampling inlet from graduate student Kyle Custard (Purdue University)</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">School bus at the Cake Eater Lab!</td></tr>
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Thank you very much to Ross Lieb-Lappen (Dartmouth College) for organizing this great field trip, and thank you to Jenn Wallace and her awesome 3rd grade class!Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0tag:blogger.com,1999:blog-1351790966541818119.post-68701856595568512182012-03-21T13:15:00.000-08:002012-03-21T15:29:41.947-08:00Town of Barrow, Alaska<div class="separator" style="clear: both; text-align: center;">
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The town of Barrow consists of ~4,500 residents, over half of which are I<span style="font-family: "Times New Roman"; font-size: 12pt;">ñ</span>upiat Eskimo, according to the North Slope Borough's website. Kyle and I have been here for over four weeks now and have been able to explore a bit of the town. Here are some highlights!</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpz61LwutYcoQ47rNCZAR7xtSEF9twh3fiT1Urp1LdEfGNy_aFKjig-_3myD-B6TYswpW6fdwocRudwPvw0ys4bbhdV8i_Ml_PyEEYfj64WZW-LLVLBO-gCvNVTWgIEDj59oSq8bM7Dcc/s1600/IMG_0991.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpz61LwutYcoQ47rNCZAR7xtSEF9twh3fiT1Urp1LdEfGNy_aFKjig-_3myD-B6TYswpW6fdwocRudwPvw0ys4bbhdV8i_Ml_PyEEYfj64WZW-LLVLBO-gCvNVTWgIEDj59oSq8bM7Dcc/s640/IMG_0991.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Alaska Airlines one-room check-in, terminal, and baggage claim!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3mo2wYAvBROzLxyKI4cYFwMZCozkEjYbb4CZq8UwgyXngNFr5dLGV-rs0Ew7-XdueWn2-aDhBAMo6OG76_84brPM5MtbmyAPqMafOdPI9_-FGEGbe5L3Nxs4shHmkpgaKnjB7hYwKXS0/s1600/IMG_0884.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj3mo2wYAvBROzLxyKI4cYFwMZCozkEjYbb4CZq8UwgyXngNFr5dLGV-rs0Ew7-XdueWn2-aDhBAMo6OG76_84brPM5MtbmyAPqMafOdPI9_-FGEGbe5L3Nxs4shHmkpgaKnjB7hYwKXS0/s640/IMG_0884.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Town of Barrow with the sea ice in the distance - The buildings are built on stilts that extend into the permafrost.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYGqsmqFAUZOkPdwNiPHtID4myi2ptL2xPFxZBx8AIBFAfo6avK9H11scMo2cDsqT8cev3Z419zpjk94gU8lY2aXTcqBZwDKdVtfPAE3jm0CtlGHDxiXHCwiKf3WIn1p6F6CemRbPgAqw/s1600/IMG_0887.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYGqsmqFAUZOkPdwNiPHtID4myi2ptL2xPFxZBx8AIBFAfo6avK9H11scMo2cDsqT8cev3Z419zpjk94gU8lY2aXTcqBZwDKdVtfPAE3jm0CtlGHDxiXHCwiKf3WIn1p6F6CemRbPgAqw/s640/IMG_0887.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Heavy duty shop!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLERdAxP53vxTQOQP0xi46eeR9WdVvaMfxKIH0-f998MFve14dewxX60dV6SnqrkhflWEn2kdg46eGMhtKb7Iw-Sy371EDHGRvLcHxLi0Hmr3N5BdS_Y9wg9r5d4sEMxgeoN_dDv-DVno/s1600/IMG_0888.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLERdAxP53vxTQOQP0xi46eeR9WdVvaMfxKIH0-f998MFve14dewxX60dV6SnqrkhflWEn2kdg46eGMhtKb7Iw-Sy371EDHGRvLcHxLi0Hmr3N5BdS_Y9wg9r5d4sEMxgeoN_dDv-DVno/s640/IMG_0888.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Light duty shop!</td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhU0G-FLsopTIhofNl7ybKTGdTQGoU8k8-cyekhEu9xsmxg0vLKtBfUGwUwBHApnP56UHj5EgnpPphrLu-ji931IzbCbMTzKqKPh1cTH0ZYNz7DrdU0Xr2ePAHhGQs7Wq3CATNSWcoJ4zA/s1600/IMG_0886.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhU0G-FLsopTIhofNl7ybKTGdTQGoU8k8-cyekhEu9xsmxg0vLKtBfUGwUwBHApnP56UHj5EgnpPphrLu-ji931IzbCbMTzKqKPh1cTH0ZYNz7DrdU0Xr2ePAHhGQs7Wq3CATNSWcoJ4zA/s640/IMG_0886.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">The AC - where the town does the vast majority of their shopping! (Sea ice in the distance)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-abX-hE_Nl6GxPwqsD0WYrxtCO_YRYCreyXSV2HcGdGhQFudCHqQut47tqbLcP1uvMWYaSk7NDZI_OXTYITQkmr64D0gqU1E4DjVIfidPxgsyBmIN1Io3_MUxAJCM6xLFC31OyD5QbL4/s1600/IMG_0138.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-abX-hE_Nl6GxPwqsD0WYrxtCO_YRYCreyXSV2HcGdGhQFudCHqQut47tqbLcP1uvMWYaSk7NDZI_OXTYITQkmr64D0gqU1E4DjVIfidPxgsyBmIN1Io3_MUxAJCM6xLFC31OyD5QbL4/s640/IMG_0138.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">One stop shopping at the AC - furniture, snow machines, clothes, toys, tools, and groceries!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMW6fQwU5dZqJNHDME4U7k4wWgMJmEv-GyW4qdIrX4_tEFeXofPeq6Kqc-vEXhZfP6yIjfyvqJeZiQpuCojAua2lqV-RnIiBJ3ljoDFvgEaHop18_SABl4ACZwpyTgFIwMi5yFnPw98yE/s1600/IMG_0139.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMW6fQwU5dZqJNHDME4U7k4wWgMJmEv-GyW4qdIrX4_tEFeXofPeq6Kqc-vEXhZfP6yIjfyvqJeZiQpuCojAua2lqV-RnIiBJ3ljoDFvgEaHop18_SABl4ACZwpyTgFIwMi5yFnPw98yE/s400/IMG_0139.JPG" width="300" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">So, milk is a little expensive...$7 for a half gallon! Everything "fresh" has to be flown up here in the winter, and it's difficult to keep things from freezing here!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz1b22xk1PWYVmHzLcDpYaSgDzZ9l99e52RbH6BQDzHKs05np5HSuTF3WMbmM_4J5yPoCzgWHV-GcD4Z6FtUIi_3XwhNuPOOFtaAKio3xkWb2hi_YvvT9PRuzRBW6x8ZkmeWA68sXtpTk/s1600/IMG_0992.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="425" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz1b22xk1PWYVmHzLcDpYaSgDzZ9l99e52RbH6BQDzHKs05np5HSuTF3WMbmM_4J5yPoCzgWHV-GcD4Z6FtUIi_3XwhNuPOOFtaAKio3xkWb2hi_YvvT9PRuzRBW6x8ZkmeWA68sXtpTk/s640/IMG_0992.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Barrow High School - Home of Whalers basketball! (and the gym that Kyle and I frequently visit)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUrhWotqNZxra51biJq9DF-TQ8DOkX4tT1UGwEWWZyEFeqOdyu78_l_tFRyeZzK5IUfBMy5_C-dPysLDRR0fMnfhyphenhyphenUTsJs26Nsd1PJNjWaVP-xWGLL13yfNEDc0DjkW4mAvBxNSYrRpFk/s1600/IMG_0998.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUrhWotqNZxra51biJq9DF-TQ8DOkX4tT1UGwEWWZyEFeqOdyu78_l_tFRyeZzK5IUfBMy5_C-dPysLDRR0fMnfhyphenhyphenUTsJs26Nsd1PJNjWaVP-xWGLL13yfNEDc0DjkW4mAvBxNSYrRpFk/s400/IMG_0998.JPG" width="265" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">It's a little expensive to fill up the truck!</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyi0i1NAMAV0Lvou3k3tiIBZrzJokKLSXDY0vHjpdJsuaKq8jcJp6tSlBILDOfliM1-B0IwKRsNjr15ot3_FuuT3Dqj9YQ6HIE5e7BHSVD-mt-2O9oA4lA-k1-gB5t3eFOBA6h4Tpc_gU/s1600/IMG_0889.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="425" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyi0i1NAMAV0Lvou3k3tiIBZrzJokKLSXDY0vHjpdJsuaKq8jcJp6tSlBILDOfliM1-B0IwKRsNjr15ot3_FuuT3Dqj9YQ6HIE5e7BHSVD-mt-2O9oA4lA-k1-gB5t3eFOBA6h4Tpc_gU/s640/IMG_0889.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Ilisa<span style="font-family: "Times New Roman"; font-size: 12pt;">ġ</span>vik College (local college right next to our hut)</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMFj2uN9mRanltsM6FX-IvemrjMt-MtTfQEAKCHE9BADgR7gomAdvnO-WW6jl4EMmidr3sS4SLrFLKuwOyKSCee5ORtD1A4Hql03uXO3HdCZ_zc1N2sokVTGDN_dvR6SchyJ3HkdV_S_c/s1600/IMG_0996.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="425" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMFj2uN9mRanltsM6FX-IvemrjMt-MtTfQEAKCHE9BADgR7gomAdvnO-WW6jl4EMmidr3sS4SLrFLKuwOyKSCee5ORtD1A4Hql03uXO3HdCZ_zc1N2sokVTGDN_dvR6SchyJ3HkdV_S_c/s640/IMG_0996.JPG" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">View of the sea ice from the road next to the "beach"</td></tr>
</tbody></table>Kerri Pratthttp://www.blogger.com/profile/00929295589025297974noreply@blogger.com0