Entry_ID: NSIDC-0279
Entry_Title: Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)
Group: 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
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Eric
   Last_Name: Saltzman
   Email: esaltzma@uci.edu
   Phone: 1 949 824-3936 
   Fax: 1 949  824-3874 
   Group: Contact_Address
      Address: University of California, Irvine
      Address: Department of Earth System Science
      Address: Department of Earth System Science
      Address: University of California, Irvine
      City: Irvine
      Province_or_State: CA
      Postal_Code: 92697-3100
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Murat
   Last_Name: Aydin
   Email: maydin@uci.edu
   Phone: 1 949 824-6174 x5540
   Group: Contact_Address
      Address: University of California, Irvine
      Address: Earth System Science
      Address: University of California, Irvine
      Address: Earth System Science
      City: Irvine
      Province_or_State: C
      Postal_Code: 92697-3100
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Air Quality
   Variable_Level_1: Sulfur Oxides
   Detailed_Variable: Carbonyl Sulfide
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Chemistry
   Variable_Level_1: Halocarbons and Halogens
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Chemistry
   Variable_Level_1: Halocarbons and Halogens
   Variable_Level_2: Halocarbons
   Detailed_Variable: Methyl Chloride, Methyl Bromide
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Chemistry
   Variable_Level_1: Sulfur Compounds
   Variable_Level_2: Sulfur Oxides
   Detailed_Variable: Carbonyl Sulfide
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Firn
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Chemistry
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Paleoclimate
   Term: Ice Core Records
   Variable_Level_1: Ice Core Air Bubbles
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Chemistry
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: AGDC
Keyword: Antarctica
Keyword: Atmospheric Chemistry
Keyword: Atmospheric Gases
Keyword: AWS Siple
Keyword: Chloride (CL)
Keyword: Glaciology
Keyword: Ice Core
Keyword: Ice Core Chemistry
Keyword: Ice Core Gas Records
Keyword: Ice Cores
Keyword: Mass Spectrometer
Keyword: Mass Spectrometry
Keyword: NSIDC-0279
Keyword: OZONE DEPLETION
Keyword: Siple Coast
Keyword: Siple Dome
Keyword: Trapped Gases
Keyword: WAIS
Keyword: West Antarctica
Sensor_Name: CORING DEVICES
Sensor_Name: GAS CHROMATOGRAPHS
Sensor_Name: MASS SPECTROMETERS
Source_Name: GROUND STATIONS
Group: Paleo_Temporal_Coverage
   Paleo_Start_Date: 1616 AD
   Paleo_Stop_Date: 1995
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -81.65
   Northernmost_Latitude: -81.65
   Westernmost_Longitude: -148.81
   Easternmost_Longitude: -148.81
   Minimum_Altitude: 620 meters
   Maximum_Altitude: 620 meters
   Minimum_Depth: 0 meters
   Maximum_Depth: 91.945 meters
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: POLAR
End_Group
Project: WAISCORES > West Antarctic Ice Sheet Cores
Group: 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.

End_Group
Data_Set_Language: English
Originating_Center: AGDC
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: AGDC > Antarctic Glaciological Data Center
   Data_Center_URL: http://nsidc.org/agdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: AGDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 x
      Fax: 1 303  492-2468 x
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 16 - 21 KB
   Distribution_Format: Microsoft Excel
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 16 - 21 KB
   Distribution_Format: Microsoft Word
End_Group
Group: 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.

End_Group
Group: 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.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/agdc/index.html
   Description: AGDC Web site
End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2005-11-16
Last_DIF_Revision_Date: 2014-03-14
DIF_Revision_History: Removed USADCC logo for Search cleanup.