Identification_Information:
   Dataset_Identifier: G02172

   Citation: 
      Citation_Information: 
         Originator: National Ice Center.  Compiled by F. Fetterer and C. Fowler. 
         Publication_Date: 20060101
         Title: National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format
         Publication_Information: 
            Publication_Place: Boulder, Colorado USA
            Publisher: NSIDC: National Snow and Ice Data Center
         Online_Linkage: http://nsidc.org/data/g02172.html
         Online_Linkage: http://dx.doi.org/10.7265/N5X34VDB

   Description: 
      Abstract:
         The U.S. National Ice Center (NIC) is an inter-agency sea ice analysis and 
         forecasting center comprised of the Department of Commerce/NOAA, the 
         Department of Defense/U.S. Navy, and the Department of Homeland Security/U.S. 
         Coast Guard components. Since 1972, NIC has produced Arctic and Antarctic sea 
         ice charts. This data set is comprised of Arctic sea ice concentration 
         climatology derived from the NIC weekly or biweekly operational ice-chart time 
         series. The charts used in the climatology are from 1972 through 2007; and the 
         monthly climatology products are median, maximum, minimum, first quartile, and 
         third quartile concentrations, as well as frequency of occurrence of ice at 
         any concentration for the entire period of record as well as for 10-year and 
         5-year periods. These climatologies and the charts from which they are derived 
         are provided in the 25-km Equal-Area Scalable Earth Grid (EASE-Grid) binary 
         (.bin) format. The climatologies are also available in ArcGIS geodatabases 
         (.mdb), and GIF format browse files (.gif) are also provided.

         NIC charts are produced through the analyses of available in situ, remote 
         sensing, and model data sources. They are generated primarily for mission 
         planning and safety of navigation. NIC charts generally show more ice than do 
         passive microwave derived sea ice concentrations, particularly in the summer 
         when passive microwave algorithms tend to underestimate ice concentration. The 
         record of sea ice concentration from the NIC series is believed to be more 
         accurate than that from passive microwave sensors, especially from the 
         mid-1990s on (see references at the end of this documentation), but it lacks 
         the consistency of some passive microwave time series.

      Purpose: scientific research
      Documentation: 
         User's_Guide: 
            Citation_Information: 
               Originator: National Ice Center.  Compiled by F. Fetterer and C. Fowler. 
               Publication_Date: 20060101
               Title: National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format
               Publication_Information: 
                  Publication_Place: Boulder, Colorado USA
                  Publisher: NSIDC: National Snow and Ice Data Center
               Online_Linkage: http://nsidc.org/data/docs/noaa/g02172_nic_charts_climo_grid/index.html

   Time_Period_of_Content:
      Time_Period_Information:
         Range_of_Dates/Times:
            Beginning_Date: 19720101
            Ending_Date: 20071231
      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: 45

   Keywords:
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
         Theme_Keyword: EARTH SCIENCE > Cryosphere > Sea Ice > Sea Ice Concentration
         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: AVHRR > Advanced Very High Resolution Radiometer
         Theme_Keyword: OLS > Operational Linescan System
         Theme_Keyword: SAR > Synthetic Aperture Radar
         Theme_Keyword: SCATTEROMETERS
         Theme_Keyword: SMMR > Scanning Multichannel Microwave Radiometer
         Theme_Keyword: SSM/I > Special Sensor Microwave/Imager
         Theme_Keyword: VISUAL OBSERVATIONS
      Theme:
         Theme_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
         Theme_Keyword: AIRCRAFT
         Theme_Keyword: DMSP > Defense Meteorological Satellite Program
         Theme_Keyword: MODELS
         Theme_Keyword: NIMBUS-7
         Theme_Keyword: NOAA POES > NOAA Polar Orbiting Environmental Satellites
         Theme_Keyword: SATELLITES
         Theme_Keyword: SHIPS
      Theme:
         Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
         Theme_Keyword: environment
         Theme_Keyword: oceans
      Theme:
         Theme_Keyword_Thesaurus: None
         Theme_Keyword: Arctic Sea Ice
         Theme_Keyword: Sea Ice
         Theme_Keyword: Sea Ice Concentration
         Theme_Keyword: Sea Ice Stage Of Development
         Theme_Keyword: Sea Ice Variability
      Place:
         Place_Keyword_Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
         Place_Keyword: Geographic Region > Arctic
         Place_Keyword: Ocean > Arctic Ocean

   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: G02172

   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: Binary
         Digital_Transfer_Option:
            Online_Option:
               Computer_Contact_Information:
                  Network_Address:
                     Network_Resource_Name: ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02172/
      Fees: None

Metadata_Reference_Information:
   Metadata_Date: 20131001

   Metadata_Review_Date: 20131001

   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