Tuesday, April 23, 2013
Research highlighted on LiveScience.com
Our research has been highlighted on LiveScience.com in the an article titled "Sea Ice Loss Could Alter Arctic Air Chemistry"!
Monday, April 22, 2013
Research highlighted in Chemical & Engineering News!
Our research was highlighted in this week's issue of Chemical & Engineering News!
Saturday, April 20, 2013
Research highlighted by National Science Foundation
Our research was highlighted by the National Science Foundation: "Sunlit snow triggers atmospheric cleaning, ozone depletion in the Arctic". Right now we're highlighted as the second frame on the NSF main page "Sea-Ice Snow Affects Arctic Air Chemistry"!
Video about the Shepson Group's Arctic aircraft studies!
Derek Hallquist, at Green River Pictures, with the help of Aaron Woolf, produced a fantastic new video about the Shepson Group's Arctic aircraft studies! Check out: Sea Ice Climate Research with Experimental Plane in Barrow, Alaska!
Thank you Derek!
Thank you Derek!
Thursday, April 18, 2013
Post-doc Kerri Pratt highlighted by the Earth Science Women's Network
Post-doctoral researcher Kerri Pratt was highlighted by the Earth Science Women's Network! Check out the write-up at: http://eswnonline.org/kerri-pratt/.
Tuesday, April 16, 2013
Research highlighted by Purdue News Service
Our research was highlighted by the Purdue News Service: "Sunlit snow triggers atmospheric cleaning, ozone depletion in the Arctic"!
Sunday, April 14, 2013
Arctic 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!
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.
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!
Link: http://dx.doi.org/10.1038/ngeo1779
News & Views article: http://dx.doi.org/10.1038/ngeo1805
This research was funded by NSF and NASA and completed in collaboration with many fantastic scientists!
Dr. Kerri Pratt - National Science Foundation Postdoctoral Fellow in Polar Regions Research, Department of Chemistry, Purdue University
Kyle Custard - Purdue University Chemistry Ph.D. Student
Prof. Paul Shepson - Purdue University Professor of Chemistry, Founder of Purdue Climate Change Research Center
Dr. Tom Douglas - Research Chemist, U.S. Army Cold Regions Research and Engineering Laboratory (Fairbanks, Alaska)
Dr. Denis Pöhler - Research Assistant, Institute of Environmental Physics, University of Heidelberg
Stephan General - University of Heidelberg Physics Ph.D. Student
Johannes Zielcke - University of Heidelberg Physics Ph.D. Student
Prof. Bill Simpson - University of Alaska Fairbanks Professor of Chemistry
Prof. Ulrich Platt - Professor, Institute of Environmental Physics, University of Heidelberg
David Tanner - Research Assistant, Department of Earth and Atmospheric Sciences, Georgia Institute of Technology
Prof. Greg Huey - Professor of Earth and Atmospheric Sciences, Georgia Institute of Technology
Mark Carlsen - Instrumentation Specialist, Jonathan Amy Facility for Chemical Instrumentation, Department of Chemistry, Purdue University
Brian Stirm - Air Operations Technical Specialist, Department of Aviation Technology, Purdue University
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!
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.
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!
Link: http://dx.doi.org/10.1038/ngeo1779
News & Views article: http://dx.doi.org/10.1038/ngeo1805
 |
|
Dr. Kerri Pratt, NSF Postdoctoral Fellow in Polar Regions
Research in Prof. Paul Shepson's lab, conducts a snow chamber experiment at -44ºF windchill near Barrow,
Alaska. (Photo credit: Paul Shepson)
|
Dr. Kerri Pratt - National Science Foundation Postdoctoral Fellow in Polar Regions Research, Department of Chemistry, Purdue University
Kyle Custard - Purdue University Chemistry Ph.D. Student
Prof. Paul Shepson - Purdue University Professor of Chemistry, Founder of Purdue Climate Change Research Center
Dr. Tom Douglas - Research Chemist, U.S. Army Cold Regions Research and Engineering Laboratory (Fairbanks, Alaska)
Dr. Denis Pöhler - Research Assistant, Institute of Environmental Physics, University of Heidelberg
Stephan General - University of Heidelberg Physics Ph.D. Student
Johannes Zielcke - University of Heidelberg Physics Ph.D. Student
Prof. Bill Simpson - University of Alaska Fairbanks Professor of Chemistry
Prof. Ulrich Platt - Professor, Institute of Environmental Physics, University of Heidelberg
David Tanner - Research Assistant, Department of Earth and Atmospheric Sciences, Georgia Institute of Technology
Prof. Greg Huey - Professor of Earth and Atmospheric Sciences, Georgia Institute of Technology
Mark Carlsen - Instrumentation Specialist, Jonathan Amy Facility for Chemical Instrumentation, Department of Chemistry, Purdue University
Brian Stirm - Air Operations Technical Specialist, Department of Aviation Technology, Purdue University
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!
Subscribe to:
Posts (Atom)