Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)Entry ID: NSIDC-0279
Abstract: This data set is part of the WAISCORES (West Antarctic Ice Sheet cores) project, research funded by the National Science Foundation (NSF) and designed to improve understanding of how the West Antarctic ice sheet influences climate and sea level change. WAISCORES investigators acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. These data provide ... researchers with a record of natural climatic variability and anthropogenic influence on biogeochemical cycles. Because ice cores contain an archive of preindustrial air, a baseline can be established, and the extent of human impact on the climate can be ascertained.
This data set includes mixing ratios of carbonyl sulfide (COS), methyl chloride (CH3Cl), and methyl bromide (CH3Br). Data samples were retrieved from the Siple C ice core, which was drilled at 81.65ï¿½ S, 148.81ï¿½ W in December 1995. The core site sits 620 m above sea level near the edge of the Ross Ice Shelf where there is a mean annual temperature of -25.4 ï¿½C.
Data are available via FTP.
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Data Set Citation
Dataset Originator/Creator: Eric Saltzman
Dataset Title: Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)
Dataset Series Name: WAISCORES
Dataset Release Date: 2005-11-20
Dataset Release Place: Boulder, CO
Dataset Publisher: National Snow and Ice Data Center (NSIDC)Online Resource: http://nsidc.org/data/nsidc-0279.html
ATMOSPHERE > AIR QUALITY > SULFUR OXIDES > CARBONYL SULFIDE
CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES
CRYOSPHERE > SNOW/ICE > SNOW/ICE CHEMISTRY
TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW/ICE CHEMISTRY
CRYOSPHERE > GLACIERS/ICE SHEETS > FIRN
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > HALOCARBONS > METHYL CHLORIDE, METHYL BROMIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > SULFUR COMPOUNDS > SULFUR OXIDES > CARBONYL SULFIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > METHYL BROMIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > METHYL CHLORIDE
ISO Topic Category
Quality The pore close-off depth at Siple Dome occurs in the range of 48 m to 56 m. Above this depth, air is able to circulate within the firn because the gaps have not been fully closed. This eventually happens as the snow accumulates above and the firn continues to densify. However, until the pores close off and trap the gases, the age of the ice and the age of the gas are not the same.
Data Set Progress
Distribution Media: FTP
Distribution Size: 71.5 KB total
Distribution Format: MS Excel and DOC format
Phone: (949) 824-3936
Fax: (949) 824-3874
Email: esaltzma at uci.edu
Department of Earth System Science University of California, Irvine
Province or State: CA
Postal Code: 92697-3100
Phone: (949) 824-6174, 5540
Email: maydin at uci.edu
University of California, Irvine Earth System Science
Province or State: CA
Postal Code: 92697-3100
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
Aydin, M., E. S. Saltzman, W. J. De Bruyn, S. A. Montzka, J. H. Butler, and M. Battle. 2004. Atmospheric variability of methyl chloride over the last 300 years from an Antarctic ice core and firn air. Geophysical Research Letters. Vol. 31. L02109, doi: 10.1029/2003GL018750.
Chin, M., and D. Davis. 1995. A reanalysis of carbonyl sulfide as a source of stratospheric background sulfur aerosol. Journal of Geophysical Research. Vol. 100. 8993-9005.
Ko, M. K. W., et al. 2003. Very short-lived halogen and sulfur substances. Scientific Assessment of Ozone Depletion: 2002, Global Ozone Research and Monitoring Project Reports. 47. World Meteorological Organization. Geneva, Switzerland. 2.1-2.57.
Montzka, S. A., M. Aydin, J. H. Butler, M. Battle, E. S. Saltzman, B. D. Hall, A. D. Clark, D. Mondeel, and J. W. Elkins. 2004. A 350 year history for carbonyl sulfide inferred from Antarctic firn air and air trapped in ice. Journal of Geophysical Research. Vol. 109. D22302, doi: 10.1029/2004JD004686.
Saltzman, E. S., M. Aydin, W. J. De Bruyn, D. B. King, and S. A. Yvon-Lewis. 2004. Methyl bromide in preindustrial air: measurements from an Antarctic ice core. Journal of Geophysical Research. Vol. 109. No. D5, D0530, doi: 10.1029/2003JD004157. Aydin, M., W. J. De Bruyn, and E. S. Saltzman. 2002. Preindustrial atmospheric carbonyl sulfide (OCS) from an Antarctic ice core. Geophysical Research Letters. Vol. 29. 9. 73-1 – 73-4.
Creation and Review Dates
DIF Creation Date: 2005-09-27
Last DIF Revision Date: 2009-02-02