Entry_ID: NSIDC-0313
Entry_Title: Antarctic Ice Cores: Methyl Chloride and Methyl Bromide
Group: Data_Set_Citation
   Dataset_Creator: Saltzman, Eric
   Dataset_Title: Antarctic Ice Cores: Methyl Chloride and Methyl Bromide
   Dataset_Release_Date: 2007-11-10
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0313.html
   Dataset DOI: http://dx.doi.org/10.7265/N5DN430Q
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: Investigator
   First_Name: Margaret
   Last_Name: Williams
   Group: Contact_Address
      Address: University of California, Irvine
      Address: Department of Earth System Science
      Address: 3325 Croul Hall
      Address: Department of Earth System Science
      Address: University of California, Irvine 
      City: Irvine
      Province_or_State: California
      Postal_Code: 92697
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Cheryl
   Last_Name: Tatum
   Group: Contact_Address
      Address: 3325 Croul Hall
      City: Irvine
      Province_or_State: California
      Postal_Code: 92697
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   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
   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
   Detailed_Variable: Carbonyl Sulfide
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
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 Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Paleoclimate
   Term: Ice Core Records
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Temperature
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Antarctica
Keyword: Atmospheric Chemistry
Keyword: Atmospheric Gases
Keyword: Ice Core
Keyword: Ice Core Chemistry
Keyword: Ice Core Data
Keyword: Ice Core Gas Records
Keyword: Ice Cores
Keyword: Mass Spectrometer
Keyword: NSIDC
Sensor_Name: CORING DEVICES
Sensor_Name: GAS CHROMATOGRAPHS
Sensor_Name: MASS SPECTROMETERS
Group: Paleo_Temporal_Coverage
   Paleo_Start_Date: 2159 ybp
   Paleo_Stop_Date: 140 ybp
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -89.93
   Northernmost_Latitude: -89.93
   Westernmost_Longitude: -144.39
   Easternmost_Longitude: -144.39
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Data_Set_Language: English
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: 70 KB
   Distribution_Format: Microsoft Excel
End_Group
Group: Reference

   M.B. Williams, M. Aydin, C. Tatum and E.S. Saltzman. A 2000 Year Atmospheric 
   History of Methyl Chloride from a South Pole Ice Core: Evidence for Climate 
   Controlled Variability, Geophysical Research Letters 
   34,doi:10.1029/2006GL029142 

   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. 

   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.

   M. Battle, M. Bender, T. Sowers, P.P. Tans, J.H. Butler, J.W. Elkins, J.T. 
   Ellis, T. Conway, N. Zhang, P. Lang and A.D. Clarke. 1996 Atmospheric gas 
   concentrations over the past centruy measured in air from firn at the South 
   Pole. Nature, 383:231-235 

   Butler, J.H., M. Battle, M. Bender, S.A. Montzka, A.D. Clarke, E.S. Saltzman, 
   C. Sucher, J. Severinghaus, and J.W. Elkins. 1999. A twentieth century record 
   of atmospheric halocarbons in polar firn air. Nature 399:749-765.

End_Group
Group: Summary

   This data set is an analysis of methyl chloride (CH3Cl) and methyl bromide 
   (CH3Br) in Antarctic ice core samples. Investigators reported mixing ratios of 
   methyl chloride gas extracted from samples taken from the South Pole Remote 
   Earth Science and Seismological Observatory (SPRESSO) core, drilled as part of 
   the International Trans Antarctic Science Expedition (ITASE). This data covers 
   an age range of 2159 - 140 years before present (Y.B.P.) where the year 2000 
   was used as present. Investigators analyzed trace gases in ice core samples 
   from Siple Dome, West Antarctica (dry-drilled C core and deep, fluid-drilled A 
   core) and from South Pole, Antarctica (300 m dry drilled SPRESSO core). Data 
   are available in Microsoft Excel format and are available via FTP.

End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2007-11-10
Last_DIF_Revision_Date: 2013-03-18
DIF_Revision_History:  Added DOI