Identification_Information:
   Dataset_Identifier: NSIDC-0504

   Citation: 
      Citation_Information: 
         Originator: Aydin, M. and E. Saltzman
         Publication_Date: 20111130
         Title: Alkanes in Firn Air Samples, Antarctica and Greenland
         Publication_Information: 
            Publication_Place: Boulder, Colorado USA
            Publisher: NSIDC: National Snow and Ice Data Center
         Online_Linkage: http://nsidc.org/data/nsidc-0504.html
         Online_Linkage: http://dx.doi.org/10.7265/N5X9287C

   Description: 
      Abstract:
         This data set contains ethane, propane, and n-butane measurements in firn air 
         from the South Pole and the West Antarctic Ice Sheet (WAIS) Divide in 
         Antarctica, and from Summit, Greenland. The WAIS Divide and South Pole samples 
         were collected in December to January of of 2005/06 and 2008/09, respectively. 
         The Summit firn was sampled in the summer of 2006. Analyses were conducted on 
         a gas chromatography - mass spectrometry (GC-MS) system at the University of 
         California, Irvine. Measurements and the associated uncertainties are reported 
         as dry air molar mixing ratios in part per trillion (ppt). The reported 
         measurements for each sampling depth represent a mean of multiple measurements 
         on more than one flask in most cases.

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

      Purpose: scientific research
      Documentation: 
         User's_Guide: 
            Citation_Information: 
               Originator: Aydin, M. and E. Saltzman
               Publication_Date: 20111130
               Title: Alkanes in Firn Air Samples, Antarctica and Greenland
               Publication_Information: 
                  Publication_Place: Boulder, Colorado USA
                  Publisher: NSIDC: National Snow and Ice Data Center
               Online_Linkage: http://nsidc.org/data/docs/agdc/nsidc0504-aydin/index.html

   Time_Period_of_Content:
      Time_Period_Information:
         Range_of_Dates/Times:
            Beginning_Date: 20051201
            Ending_Date: 20090131
      Currentness_Reference: publication date

   Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: Unknown

   Spatial_Domain:
      Bounding_Coordinates:
         West_Bounding_Coordinate: -38.3833
         East_Bounding_Coordinate: 112.09
         North_Bounding_Coordinate: 72.5833
         South_Bounding_Coordinate: -90

   Keywords:
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
         Theme_Keyword: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry > Carbon and Hydrocarbon Compounds
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Firn
         Theme_Keyword: EARTH SCIENCE > Terrestrial Hydrosphere > Glaciers/Ice Sheets > Firn
         Theme_Keyword: EARTH SCIENCE > Terrestrial Hydrosphere > Water Quality/Water Chemistry > Hydrocarbons
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: 
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
         Theme_Keyword: GAS CHROMATOGRAPHS
         Theme_Keyword: MASS SPECTROMETERS
      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: chromatography
         Theme_Keyword: Firn
         Theme_Keyword: firn air chemistry
         Theme_Keyword: firn air samples
         Theme_Keyword: GAS CHROMATOGRAPHY
         Theme_Keyword: Mass Spectrometer
         Theme_Keyword: Mass Spectrometry
         Theme_Keyword: Polar Firn Air
      Place:
         Place_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
         Place_Keyword: Continent > Antarctica
         Place_Keyword: Continent > North America > Greenland
         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-0504

   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/nsidc0504_aydin_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