Identification_Information:
   Dataset_Identifier: G02135

   Citation: 
      Citation_Information: 
         Originator: Fetterer, F., K. Knowles, W. Meier, and M. Savoie. 
         Publication_Date: 20021205
         Title: Sea Ice Index
         Publication_Information: 
            Publication_Place: Boulder, Colorado USA
            Publisher: NSIDC: National Snow and Ice Data Center
         Online_Linkage: http://nsidc.org/data/g02135.html
         Online_Linkage: http://dx.doi.org/10.7265/N5QJ7F7W

   Description: 
      Abstract:
         The Sea Ice Index provides a quick look at Arctic- and Antarctic-wide changes 
         in sea ice. It is a source for consistent, up-to-date sea ice extent and 
         concentration images and data values from November 1978 to the present.

         Sea Ice Index images depict ice cover and trends in ice cover in the Arctic 
         and Antarctic oceans. Sea Ice Index data files tabulate ice extent in numbers. 
         The images and data are produced in a consistent way that makes the Index 
         time-series appropriate for use when looking at long-term trends in sea ice 
         cover. Both monthly and daily products are available. However, monthly 
         products are better to use for long-term trend analysis because errors in the 
         daily product tend to be averaged out in the monthly product and because 
         day-to-day variations are often the result of short-term weather. 

         Monthly images show sea ice extent with an outline of the median extent for 
         that month for comparison. Other monthly images show sea ice concentration as 
         well as trends in concentration for that month. Monthly extent products are 
         also available as geographic information systems (GIS) compatible shapefiles. 
         Plain ASCII text data files contain monthly mean extent and area, in millions 
         of square kilometers, by year. These monthly extent numbers are used for 
         graphs of extent anomalies with trend lines and significance intervals. 
         Anomalies and median extent are calculated using a 30-year reference period of 
         1981 through 2010.

         Daily images show sea ice extent, with an outline of the median extent for 
         that day for comparison, and sea ice concentration. Plain ASCII text data 
         files contain daily extent, in millions of square kilometers, for almost every 
         day from 1978 onward. These daily extent numbers are used for graphs of daily 
         extent over the last four months.

      Purpose: scientific research
      Documentation: 
         User's_Guide: 
            Citation_Information: 
               Originator: Fetterer, F., K. Knowles, W. Meier, and M. Savoie. 
               Publication_Date: 20021205
               Title: Sea Ice Index
               Publication_Information: 
                  Publication_Place: Boulder, Colorado USA
                  Publisher: NSIDC: National Snow and Ice Data Center
               Online_Linkage: http://nsidc.org/data/docs/noaa/g02135_seaice_index/index.html

   Time_Period_of_Content:
      Time_Period_Information:
         Range_of_Dates/Times:
            Beginning_Date: 19790101
            Ending_Date: Unknown
      Currentness_Reference: publication date

   Status:
      Progress: In work
      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 > Sea Ice > Ice Extent
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Sea Ice > Ice Growth/Melt
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Sea Ice > Reflectance
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Sea Ice > Sea Ice Concentration
         Theme_Keyword: EARTH SCIENCE > Oceans > Sea Ice > Ice Extent
         Theme_Keyword: EARTH SCIENCE > Oceans > Sea Ice > Ice Growth/Melt
         Theme_Keyword: EARTH SCIENCE > Oceans > Sea Ice > Reflectance
         Theme_Keyword: EARTH SCIENCE > Oceans > Sea Ice > Sea Ice Concentration
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: 
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
         Theme_Keyword: SMMR > Scanning Multichannel Microwave Radiometer
         Theme_Keyword: SSM/I > Special Sensor Microwave/Imager
         Theme_Keyword: SSMIS > Special Sensor Microwave Imager/Sounder
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
         Theme_Keyword: DMSP 5D-3/F17 > Defense Meteorological Satellite Program-F17
         Theme_Keyword: DMSP > Defense Meteorological Satellite Program
         Theme_Keyword: NIMBUS-7
         Theme_Keyword: SATELLITES
      Theme:
         Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
         Theme_Keyword: climatologyMeteorologyAtmosphere
         Theme_Keyword: oceans
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: NOAA
         Theme_Keyword: Sea Ice
         Theme_Keyword: Sea Ice Anomalies
         Theme_Keyword: Sea Ice Conditions
         Theme_Keyword: Sea Ice Trends
      Place:
         Place_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
         Place_Keyword: Continent > Antarctica
         Place_Keyword: Geographic Region > Arctic

   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: G02135

   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: PNG
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/
      Fees: None

   Standard_Order_Process:
      Digital_Form:
         Digital_Transfer_Information:
            Format_Name: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/
      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/DATASETS/NOAA/G02135/
      Fees: None

Metadata_Reference_Information:
   Metadata_Date: 20140106

   Metadata_Review_Date: 20140106

   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