Identification_Information:
   Dataset_Identifier: NSIDC-0493

   Citation: 
      Citation_Information: 
         Originator: Mitchell, L. E., E. J. Brook, T. Sowers, J. R. McConnell, and K. Taylor
         Publication_Date: 20110527
         Title: Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A)
         Publication_Information: 
            Publication_Place: Boulder, Colorado USA
            Publisher: NSIDC: National Snow and Ice Data Center
         Online_Linkage: http://nsidc.org/data/nsidc-0493.html
         Online_Linkage: http://dx.doi.org/10.7265/N5319SV3

   Description: 
      Abstract:
         This data set provides a high-precision and high-resolution record of 
         atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core 
         WDC05A, spanning the years 1000 to 1800 C.E. The data include methane (CH4) 
         concentration measurements and ice age chronology. Methane concentration data 
         include mean sample depth, gas age, mean concentration, and concentrations 
         from individual measurements, at a temporal resolution of approximately nine 
         years. Ice chronology data include depth and ice age.

         Data are available via FTP, in Microsoft Excel (.xlsx) format.

      Purpose: scientific research
      Documentation: 
         User's_Guide: 
            Citation_Information: 
               Originator: Mitchell, L. E., E. J. Brook, T. Sowers, J. R. McConnell, and K. Taylor
               Publication_Date: 20110527
               Title: Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A)
               Publication_Information: 
                  Publication_Place: Boulder, Colorado USA
                  Publisher: NSIDC: National Snow and Ice Data Center
               Online_Linkage: http://nsidc.org/data/docs/agdc/nsidc0493_mitchell/index.html

   Time_Period_of_Content:
      Time_Period_Information:
         Range_of_Dates/Times:
            Beginning_Date: Unknown
            Ending_Date: Unknown
      Currentness_Reference: publication date

   Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Unknown

   Spatial_Domain:
      Bounding_Coordinates:
         West_Bounding_Coordinate: 112.09
         East_Bounding_Coordinate: 112.09
         North_Bounding_Coordinate: -79.47
         South_Bounding_Coordinate: -79.47

   Keywords:
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
         Theme_Keyword: EARTH SCIENCE > Paleoclimate > Ice Core Records
         Theme_Keyword: EARTH SCIENCE > Paleoclimate > Ice Core Records > Ice Core Air Bubbles
         Theme_Keyword: EARTH SCIENCE > Paleoclimate > Ice Core Records > Methane
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: 
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
         Theme_Keyword: GAS CHROMATOGRAPHS
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
         Theme_Keyword: FIELD INVESTIGATION
         Theme_Keyword: LABORATORY
      Theme:
         Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
         Theme_Keyword: climatologyMeteorologyAtmosphere
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: Antarctica
         Theme_Keyword: gas measurement
         Theme_Keyword: gas record
         Theme_Keyword: Greenhouse Gases
         Theme_Keyword: Ice Core
         Theme_Keyword: Ice Core Chemistry
         Theme_Keyword: Ice Core Gas Composition
         Theme_Keyword: Ice Core Gas Records
         Theme_Keyword: Methane
         Theme_Keyword: WAIS
         Theme_Keyword: West Antarctica
      Place:
         Place_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
         Place_Keyword: Continent > Antarctica
         Place_Keyword: Geographic Region > Polar

   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-0493

   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/nsidc0493_mitchell_V01/
      Fees: None

   Standard_Order_Process:
      Digital_Form:
         Digital_Transfer_Information:
            Format_Name: PDF
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0493_mitchell_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