Entry_ID: NSIDC-0504
Entry_Title: Alkanes in Firn Air Samples, Antarctica and Greenland
Group: Data_Set_Citation
   Dataset_Creator: Aydin, M. and E. Saltzman
   Dataset_Title: Alkanes in Firn Air Samples, Antarctica and Greenland
   Dataset_Release_Date: 2011-11-30
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0504.html
   Dataset DOI: http://dx.doi.org/10.7265/N5X9287C
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: 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: 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: Atmospheric Chemistry
   Variable_Level_1: Carbon and Hydrocarbon Compounds
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: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Firn
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Water Quality/Water Chemistry
   Variable_Level_1: Hydrocarbons
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: chromatography
Keyword: Firn
Keyword: firn air chemistry
Keyword: firn air samples
Keyword: GAS CHROMATOGRAPHY
Keyword: Mass Spectrometer
Keyword: Mass Spectrometry
Keyword: Polar Firn Air
Sensor_Name: GAS CHROMATOGRAPHS
Sensor_Name: MASS SPECTROMETERS
Source_Name: FIELD INVESTIGATION
Source_Name: LABORATORY
Group: Temporal_Coverage
   Start_Date: 2008-12-01
   Stop_Date: 2009-01-31
End_Group
Group: Temporal_Coverage
   Start_Date: 2006-06-01
   Stop_Date: 2006-09-01
End_Group
Group: Temporal_Coverage
   Start_Date: 2005-12-01
   Stop_Date: 2006-01-31
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: 72.5833
   Northernmost_Latitude: 72.5833
   Westernmost_Longitude: -38.3833
   Easternmost_Longitude: -38.3833
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: -90
   Northernmost_Latitude: -90
   Westernmost_Longitude: 0
   Easternmost_Longitude: 0
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: -79.47
   Northernmost_Latitude: -79.47
   Westernmost_Longitude: 112.09
   Easternmost_Longitude: 112.09
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: GREENLAND
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: POLAR
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: 19 KB
   Distribution_Format: Microsoft Excel
End_Group
Group: Reference

   Aydin, M., K. R. Verhulst, E. S. Saltzman, M. O. Battle, S. A. Montzka, D. R. 
   Blake, Q. Tang, and M. J. Prather. 2011. Recent decreases in fossil-fuel 
   emissions of ethane and methane derived from firn air, Nature, 476, 198-201, 
   doi:10.1038/nature10352.

   Aydin, M., M. B. Williams, and E. S. Saltzman. 2007. Feasibility of 
   reconstructing paleoatmospheric records of selected alkanes, methyl halides, 
   and sulfur gases from Greenland ice cores. J. Geophys. Res., 112, D07312, 
   doi:10.1029/2006JD008027. 

   Battle, M. et al. 1996. Atmospheric Gas Concentrations over the Past Century 
   Measured in Air from Firn at the South Pole. Nature 383. 231-235.

End_Group
Group: Summary

   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.

End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2011-11-30
Last_DIF_Revision_Date: 2013-03-20
DIF_Revision_History:  Added DOI