NSIDC-0504 Alkanes in Firn Air Samples, Antarctica and Greenland Aydin, M. and E. Saltzman Alkanes in Firn Air Samples, Antarctica and Greenland 2011-11-30 Boulder, Colorado USA NSIDC: National Snow and Ice Data Center http://nsidc.org/data/nsidc-0504.html http://dx.doi.org/10.7265/N5X9287C Investigator Murat Aydin maydin@uci.edu 1 949 824-6174 x5540

University of California, Irvine

Earth System Science

University of California, Irvine

Earth System Science

Irvine C 92697-3100 USA Investigator Eric Saltzman esaltzma@uci.edu 1 949 824-3936 1 949 824-3874

University of California, Irvine

Department of Earth System Science

Department of Earth System Science

University of California, Irvine

Irvine CA 92697-3100 USA Technical Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 x 1 303 492-2468 x

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA EARTH SCIENCE Atmosphere Atmospheric Chemistry Carbon and Hydrocarbon Compounds EARTH SCIENCE Cryosphere Glaciers/Ice Sheets Firn EARTH SCIENCE Terrestrial Hydrosphere Glaciers/Ice Sheets Firn EARTH SCIENCE Terrestrial Hydrosphere Water Quality/Water Chemistry Hydrocarbons Climatology/Meteorology/Atmosphere chromatography Firn firn air chemistry firn air samples GAS CHROMATOGRAPHY Mass Spectrometer Mass Spectrometry Polar Firn Air GAS CHROMATOGRAPHS MASS SPECTROMETERS FIELD INVESTIGATION LABORATORY 2005-12-01 2006-01-31 2006-06-01 2006-09-01 2008-12-01 2009-01-31 complete 72.5833 72.5833 -38.3833 -38.3833 -90 -90 0 0 -79.47 -79.47 112.09 112.09 CONTINENT ANTARCTICA CONTINENT NORTH AMERICA GREENLAND GEOGRAPHIC REGION POLAR English NSIDC National Snow and Ice Data Center http://nsidc.org Data Center Contact NSIDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA NSIDC_AGDC NSIDC Antarctic Glaciological Data Center http://nsidc.org/agdc/ Data Center Contact NSIDC AGDC User Services nsidc@nsidc.org 1 303 492-6199 1 303 492-2468

National Snow and Ice Data Center

CIRES, 449 UCB

University of Colorado

Boulder CO 80309-0449 USA FTP 19 KB Microsoft Excel Aydin, M., K. R. Verhulst, E. S. Saltzman, M. O. Battle, S. A. Montzka, D. R. Blake, Q. Tang, and M. J. Prather. 2011. Recent decreases in fossil-fuel emissions of ethane and methane derived from firn air, Nature, 476, 198-201, doi:10.1038/nature10352. Aydin, M., M. B. Williams, and E. S. Saltzman. 2007. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores. J. Geophys. Res., 112, D07312, doi:10.1029/2006JD008027. Battle, M. et al. 1996. Atmospheric Gas Concentrations over the Past Century Measured in Air from Firn at the South Pole. Nature 383. 231-235.

This data set contains ethane, propane, and n-butane measurements in firn air from the South Pole and the West Antarctic Ice Sheet (WAIS) Divide in Antarctica, and from Summit, Greenland. The WAIS Divide and South Pole samples were collected in December to January of of 2005/06 and 2008/09, respectively. The Summit firn was sampled in the summer of 2006. Analyses were conducted on a gas chromatography - mass spectrometry (GC-MS) system at the University of California, Irvine. Measurements and the associated uncertainties are reported as dry air molar mixing ratios in part per trillion (ppt). The reported measurements for each sampling depth represent a mean of multiple measurements on more than one flask in most cases. Data are available via FTP in Microsoft Excel (.xls) format.

CEOS IDN DIF 9.7 2011-11-30 2013-03-20 Added DOI