Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)

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Entry ID

NSIDC-0279

Summary

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.

Data are available via FTP.

Geographic Coverage

 

Spatial Coordinates:
N: -81.65°     S: -81.65°     E: -148.81°     W: -148.81°     Min Altitude: 620 meters     Max Altitude: 620 meters     Min Depth: 0 meters     Max Depth: 91.945 meters

Data Set Citation

Dataset Creator: Eric Saltzman
Dataset Title: Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)
Dataset Release Date: 2005-11-16
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0279.html
Dataset DOI: http://dx.doi.org/10.7265/N53B5X3G

Paleo Temporal Coverage

Paleo Start Date: 1616 AD
Paleo Stop Date: 1995

Location Keywords

  • CONTINENT ANTARCTICA
  • GEOGRAPHIC REGION POLAR

Science Keywords

  • Atmosphere Air Quality Sulfur Oxides Carbonyl Sulfide
  • Atmosphere Atmospheric Chemistry Halocarbons and Halogens
  • Atmosphere Atmospheric Chemistry Halocarbons and Halogens Halocarbons Methyl Chloride, Methyl Bromide
  • Atmosphere Atmospheric Chemistry Sulfur Compounds Sulfur Oxides Carbonyl Sulfide
  • Cryosphere Glaciers/Ice Sheets Firn
  • Cryosphere Glaciers/Ice Sheets Ice Sheets
  • Cryosphere Snow/Ice Snow/Ice Chemistry
  • Paleoclimate Ice Core Records Ice Core Air Bubbles
  • Terrestrial Hydrosphere Glaciers/Ice Sheets Ice Sheets
  • Terrestrial Hydrosphere Snow/Ice Snow/Ice Chemistry

Ancillary Keywords

  • AGDC
  • Antarctica
  • Atmospheric Chemistry
  • Atmospheric Gases
  • AWS Siple
  • Chloride (CL)
  • Glaciology
  • Ice Core
  • Ice Core Chemistry
  • Ice Core Gas Records
  • Ice Cores
  • Mass Spectrometer
  • Mass Spectrometry
  • NSIDC-0279
  • OZONE DEPLETION
  • Siple Coast
  • Siple Dome
  • Trapped Gases
  • WAIS
  • West Antarctica

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • GROUND STATIONS

Instrument

  • CORING DEVICES
  • GAS CHROMATOGRAPHS
  • MASS SPECTROMETERS

Project

  • WAISCORES West Antarctic Ice Sheet Cores

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

complete

Originating Center

AGDC

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Antarctic Glaciological Data Center
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel

Name: AGDC User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 16 - 21 KB
Distribution Format: Microsoft Excel

Distribution Media: FTP
Distribution Size: 16 - 21 KB
Distribution Format: Microsoft Word

Personnel

Eric Saltzman
Role: INVESTIGATOR
Phone: 1 949 824-3936
Fax: 1 949 824-3874
Email: esaltzma@uci.edu
Contact Address:

  • University of California, Irvine
  • Department of Earth System Science
  • Department of Earth System Science
  • University of California, Irvine

City: Irvine
Province or State: CA
Postal Code: 92697-3100
Country: USA

Murat Aydin
Role: INVESTIGATOR
Phone: 1 949 824-6174 x5540
Email: maydin@uci.edu
Contact Address:

  • University of California, Irvine
  • Earth System Science
  • University of California, Irvine
  • Earth System Science

City: Irvine
Province or State: C
Postal Code: 92697-3100
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW PROJECT HOME PAGE
AGDC Web site

Reference

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.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2005-11-16
Last DIF Revision Date: 2014-03-14

Metadata Views

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International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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