NSIDC-0279Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)Saltzman, E. and M. Aydin.Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)2005-11-16Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/N53B5X3Ghttps://doi.org/10.7265/N53B5X3GNSIDC-0279InvestigatorEricSaltzmanesaltzma@uci.edu1-949-824-39361-949-824-3874Department of Earth System ScienceUniversity of California, IrvineIrvineCA92697-3100USAInvestigatorMuratAydinmaydin@uci.edu1-949-824-6174University of California, IrvineEarth System ScienceIrvineC92697-3100USATechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCEAtmosphereAir QualitySulfur Oxides CARBONYL SULFIDEEARTH SCIENCEAtmosphereAtmospheric ChemistrySulfur CompoundsSulfur Oxides CARBONYL SULFIDEEARTH SCIENCECryosphereGlaciers/Ice SheetsFirn FIRNEARTH SCIENCEAtmosphereAtmospheric ChemistryHalocarbons and Halogens HALOCARBONS AND HALOGENSEARTH SCIENCEPaleoclimateIce Core RecordsIce Core Air Bubbles ICE CORE AIR BUBBLESEARTH SCIENCECryosphereGlaciers/Ice SheetsIce Sheets ICE SHEETSEARTH SCIENCETerrestrial HydrosphereGlaciers/Ice SheetsIce Sheets ICE SHEETSEARTH SCIENCEAtmosphereAtmospheric ChemistryHalocarbons and HalogensHalocarbons Methyl Chloride, Methyl BromideEARTH SCIENCECryosphereSnow/IceSnow/Ice Chemistry SNOW/ICE CHEMISTRYEARTH SCIENCETerrestrial HydrosphereSnow/IceSnow/Ice Chemistry SNOW/ICE CHEMISTRYClimatology/Meteorology/AtmosphereAGDCAGDC-projectAntarcticaAtmospheric ChemistryAtmospheric GasesAWS SipleChloride (CL)GlaciologyIce CoreIce Core ChemistryIce Core Gas RecordsIce CoresMass SpectrometerMass SpectrometryNSIDC-0279OZONE DEPLETIONSiple CoastSiple DomeTrapped GasesWAISWest AntarcticaCORING DEVICESGAS CHROMATOGRAPHSMASS SPECTROMETERSGROUND STATIONSGROUND STATIONS1616 AD1995complete-81.65-81.65-148.81-148.81620 meters620 metersContinentAntarcticaGeographic RegionPolarWAISCORESWest Antarctic Ice Sheet CoresThe 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.EnglishAGDCFTP16 - 21 KBExcelFTP16 - 21 KBWordAydin, 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.
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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.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 81.65° S, 148.81° 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 °C.VIEW RELATED INFORMATIONhttps://doi.org/10.7265/N53B5X3GDocumentationGET DATAhttp://www.usap-dc.org/view/dataset/609279Get External DataPROJECT HOME PAGEhttp://nsidc.org/agdc/index.htmlAGDC Web siteAMD/USCEOS IDN DIFVERSION 9.92005-11-162023-05-23NSIDCVersion SummaryNSIDCMinor VersionNSIDCCurrent Version1NSIDCFull Dataset CitationSaltzman, E. and M. Aydin. 2005. <i>Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br).</i> [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. <a href="https://doi.org/10.7265/N53B5X3G">https://doi.org/10.7265/N53B5X3G</a>. [Date Accessed].NSIDCRetiredfalse