Identification_Information:
   Dataset_Identifier: NSIDC-0502

   Citation: 
      Citation_Information: 
         Originator: Sowers, T
         Publication_Date: 20110101
         Title: Methane Isotopes in South Pole Firn Air, 2008
         Publication_Information: 
            Publication_Place: Boulder, Colorado USA
            Publisher: NSIDC: National Snow and Ice Data Center
         Online_Linkage: http://nsidc.org/data/nsidc-0502.html
         Online_Linkage: http://dx.doi.org/10.7265/N55T3HFP

   Description: 
      Abstract:
         This data set contains depth profiles for delta carbon-13 (δ13C) and 
         delta deuterium (δD) of methane (CH4) in South Pole firn air. 
         The investigators obtained air samples from two boreholes during December 2008 
         and January 2009, and subsequently determined isotope ratios at 18 depths. The 
         profiles represent a roughly 100-year history of the isotopic composition of 
         CH4 at South Pole Station (no depth-age model provided).

         Data are available via FTP as an ASCII text file (.txt) and a Microsoft Excel 
         file (.xlsx).

      Purpose: scientific research
      Documentation: 
         User's_Guide: 
            Citation_Information: 
               Originator: Sowers, T
               Publication_Date: 20110101
               Title: Methane Isotopes in South Pole Firn Air, 2008
               Publication_Information: 
                  Publication_Place: Boulder, Colorado USA
                  Publisher: NSIDC: National Snow and Ice Data Center
               Online_Linkage: http://nsidc.org/data/docs/agdc/nsidc0502_sowers/index.html

   Time_Period_of_Content:
      Time_Period_Information:
         Range_of_Dates/Times:
            Beginning_Date: 20081201
            Ending_Date: 20090131
      Currentness_Reference: publication date

   Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Unknown

   Spatial_Domain:
      Bounding_Coordinates:
         West_Bounding_Coordinate: -180
         East_Bounding_Coordinate: 180
         North_Bounding_Coordinate: 90
         South_Bounding_Coordinate: -90

   Keywords:
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Snow/Ice > Snow Depth > Meters Below Surface
         Theme_Keyword: EARTH SCIENCE > Paleoclimate > Ice Core Records > Isotopes > Delta Carbon-13 of Methane
         Theme_Keyword: EARTH SCIENCE > Paleoclimate > Ice Core Records > Isotopes > Delta Deuterium of Methane
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: 
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
         Theme_Keyword: MASS SPECTROMETERS
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
         Theme_Keyword: GROUND-BASED OBSERVATIONS
         Theme_Keyword: LABORATORY
      Theme:
         Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
         Theme_Keyword: climatologyMeteorologyAtmosphere
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: AGDC
         Theme_Keyword: Antarctica
         Theme_Keyword: Carbon
         Theme_Keyword: CARBON-13
         Theme_Keyword: CARBON ISOTOPES
         Theme_Keyword: delta 13C
         Theme_Keyword: deltaD
         Theme_Keyword: delta deuterium
         Theme_Keyword: Deuterium
         Theme_Keyword: Firn
         Theme_Keyword: firn air
         Theme_Keyword: firn air chemistry
         Theme_Keyword: Firn Air Isotope Measurements
         Theme_Keyword: Firn Air Isotopes
         Theme_Keyword: firn air samples
         Theme_Keyword: Gas Isotopes
         Theme_Keyword: ISOTOPES
         Theme_Keyword: Methane
         Theme_Keyword: methane isotopes
         Theme_Keyword: Polar Firn Air
         Theme_Keyword: Stable Isotopes
      Place:
         Place_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
         Place_Keyword: Continent > Antarctica > South Pole

   Access_Constraints: None

   Use_Constraints: None

   Point_of_Contact:
      Contact_Information:
         Contact_Person_Primary:
            Contact_Person: NSIDC User Services
            Contact_Organization: National Snow and Ice Data Center
         Contact_Address:
            Address_Type: mailing
            Address: CIRES, 449 UCB
            Address: University of Colorado
            City: Boulder
            State_or_Province: CO
            Postal_Code: 80309-0449
            Country: USA
         Contact_Voice_Telephone: 1 303 492-6199 x
         Contact_Facsimile_Telephone: 1 303  492-2468 x
         Contact_Electronic_Mail_Address: nsidc@nsidc.org

Distribution_Information:
   Distributor:
      Contact_Information:
         Contact_Organization_Primary:
            Contact_Organization: National Snow and Ice Data Center
            Contact_Person: NSIDC User Services
         Contact_Address:
            Address_Type: mailing
            Address: National Snow and Ice Data Center
            Address: CIRES, 449 UCB
            Address: University of Colorado
            City: Boulder
            State_or_Province: CO
            Postal_Code: 80309-0449
            Country: USA
         Contact_Voice_Telephone: 1 303 492-6199 
         Contact_Facsimile_Telephone: 1 303  492-2468 
         Contact_Electronic_Mail_Address: nsidc@nsidc.org

   Resource_Description: NSIDC-0502

   Distribution_Liability:
      NSIDC cannot assume liability for any damages caused by any errors or 
      omissions in the data, nor as a result of the failure of the data to function 
      on a particular system. NSIDC makes no warranty, expressed or implied, nor 
      does the fact of distribution constitute such a warranty.

   Standard_Order_Process:
      Digital_Form:
         Digital_Transfer_Information:
            Format_Name: Microsoft Excel
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0502_sowers_V01/
      Fees: None

   Standard_Order_Process:
      Digital_Form:
         Digital_Transfer_Information:
            Format_Name: ASCII Text (.txt)
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0502_sowers_V01/
      Fees: None

Metadata_Reference_Information:
   Metadata_Date: 20130320

   Metadata_Review_Date: 20130320

   Metadata_Contact: 
      Contact_Information:
         Contact_Person_Primary:
            Contact_Person: NSIDC User Services
            Contact_Organization: National Snow and Ice Data Center
         Contact_Address:
            Address_Type: mailing
            Address: National Snow and Ice Data Center
            Address: CIRES, 449 UCB
            Address: University of Colorado
            City: Boulder
            State_or_Province: CO
            Postal_Code: 80309-0449
            Country: USA
         Contact_Voice_Telephone: 1 303 492-6199 
         Contact_Facsimile_Telephone: 1 303  492-2468 
         Contact_Electronic_Mail_Address: nsidc@nsidc.org

   Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

   Metadata_Standard_Version: FGDC-STD-012-2002