<?xml version="1.0" encoding="ISO-8859-1"?>
<metadata>
  <idinfo>
    <datsetid>
      org.nsidc:NSIDC-0046
    </datsetid>
    <citation>
      <citeinfo>
        <origin>
          Richard Armstrong, Mary Jo Brodzik
        </origin>
        <pubdate>
          20050101
        </pubdate>
        <title>
          Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3
        </title>
        <edition>
          3
        </edition>
        <pubinfo>
          <pubplace>
            Boulder, CO  USA
          </pubplace>
          <publish>
            National Snow and Ice Data Center (NSIDC)
          </publish>
        </pubinfo>
        <onlink>
          http://nsidc.org/data/nsidc-0046.html
        </onlink>
      </citeinfo>
    </citation>
    <descript>
      <abstract>
        The Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3 product combines snow cover and sea ice extent at weekly intervals from 23 October 1978 through 5 June 2005, and snow cover alone from 3 October 1966 through 23 October 1978. (Sea ice data were not available prior to 23 October 1978.) The data set is the first representation of combined snow and sea ice measurements derived from satellite observations for the period of record. Designed to facilitate study of Northern Hemisphere seasonal fluctuations of snow cover and sea ice extent, the data set also includes monthly climatologies describing average extent, probability of occurrence, and variance. Data are provided in the Northern Hemisphere 25 km equal-area grid (NSIDC Nl EASE-Grid).  

Snow cover extent is based on the digital NOAA-NESDIS Weekly Northern Hemisphere Snow Charts, revised by D. Robinson (Rutgers University) and regridded to the EASE-Grid. The original NOAA-NESDIS weekly snow charts are derived from the manual interpretation of AVHRR, GOES, and other visible-band satellite data. Sea ice extent is regridded to EASE-Grid from Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data. Both NOAA and NASA provided funding for the production of this data set.
      </abstract>
      <purpose>
        scientific research
      </purpose>
      <documnts>
        <userguid>
          <citeinfo>
            <origin>
              Richard Armstrong, Mary Jo Brodzik
            </origin>
            <pubdate>
              20050101
            </pubdate>
            <title>
              Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3
            </title>
            <pubinfo>
              <pubplace>
                Boulder, CO  USA
              </pubplace>
              <publish>
                National Snow and Ice Data Center (NSIDC)
              </publish>
            </pubinfo>
            <onlink>
              http://nsidc.org/data/docs/daac/nsidc0046_nh_ease_snow_seaice.gd.html
            </onlink>
          </citeinfo>
        </userguid>
      </documnts>
    </descript>
    <timeperd>
      <timeinfo>
        <rngdates>
          <begdate>
            19661003
          </begdate>
          <enddate>
            20050605
          </enddate>
        </rngdates>
      </timeinfo>
      <current>
        publication date
      </current>
    </timeperd>
    <status>
      <progress>
        In work
      </progress>
      <update>
        Unknown
      </update>
    </status>
    <spdom>
      <bounding>
        <westbc>
          -180
        </westbc>
        <eastbc>
          180
        </eastbc>
        <northbc>
          90
        </northbc>
        <southbc>
          -90
        </southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>
          NASA Global Change Master Directory (GCMD) Science Keywords
        </themekt>
        <themekey>
          EARTH SCIENCE &gt; Cryosphere &gt; Sea Ice &gt; Ice Extent
        </themekey>
        <themekey>
          EARTH SCIENCE &gt; Cryosphere &gt; Snow/Ice &gt; Snow Cover
        </themekey>
        <themekey>
          EARTH SCIENCE &gt; Oceans &gt; Sea Ice &gt; Ice Extent
        </themekey>
        <themekey>
          EARTH SCIENCE &gt; Terrestrial Hydrosphere &gt; Snow/Ice &gt; Snow Cover
        </themekey>
      </theme>
      <theme>
        <themekt>
          NASA Global Change Master Directory (GCMD) Project Keywords
        </themekt>
        <themekey>
          NOAA/NASA PATHFINDER &gt; NOAA/NASA Pathfinder Program
        </themekey>
      </theme>
      <theme>
        <themekt>
          NASA Global Change Master Directory (GCMD) Instrument Keywords
        </themekt>
        <themekey>
          AVHRR &gt; Advanced Very High Resolution Radiometer
        </themekey>
        <themekey>
          SMMR &gt; Scanning Multichannel Microwave Radiometer
        </themekey>
        <themekey>
          SSM/I &gt; Special Sensor Microwave/Imager
        </themekey>
      </theme>
      <theme>
        <themekt>
          NASA Global Change Master Directory (GCMD) Platform Keywords
        </themekt>
        <themekey>
          DMSP 5D-2/F11 &gt; Defense Meteorological Satellite Program-F11
        </themekey>
        <themekey>
          DMSP 5D-2/F13 &gt; Defense Meteorological Satellite Program-F13
        </themekey>
        <themekey>
          DMSP 5D-2/F8 &gt; Defense Meteorological Satellite Program-F8
        </themekey>
        <themekey>
          DMSP &gt; Defense Meteorological Satellite Program
        </themekey>
        <themekey>
          GOES &gt; NOAA Geostationary Operational Environmental Satellites
        </themekey>
        <themekey>
          GOES-7 &gt; Geostationary Operational Environmental Satellite 7
        </themekey>
        <themekey>
          NIMBUS-7
        </themekey>
      </theme>
      <theme>
        <themekt>
          ISO 19115 Topic Categories
        </themekt>
        <themekey>
          climatologyMeteorologyAtmosphere
        </themekey>
        <themekey>
          oceans
        </themekey>
      </theme>
      <theme>
        <themekt>
          None
        </themekt>
        <themekey>
          Arctic
        </themekey>
        <themekey>
          DAAC
        </themekey>
        <themekey>
          EOSDIS
        </themekey>
        <themekey>
          Global
        </themekey>
        <themekey>
          Global Change
        </themekey>
        <themekey>
          Gridded Data
        </themekey>
        <themekey>
          Ice
        </themekey>
        <themekey>
          NASA
        </themekey>
        <themekey>
          Northern Hemisphere
        </themekey>
        <themekey>
          NSIDC
        </themekey>
        <themekey>
          Remote Sensing
        </themekey>
        <themekey>
          Sea Ice
        </themekey>
        <themekey>
          Sea Ice Extent
        </themekey>
        <themekey>
          SMMR
        </themekey>
        <themekey>
          Snow
        </themekey>
        <themekey>
          Snow Cover
        </themekey>
        <themekey>
          Snow Extent
        </themekey>
        <themekey>
          SSMI
        </themekey>
      </theme>
      <place>
        <placekt>
          NASA Global Change Master Directory (GCMD) Location Keywords
        </placekt>
        <placekey>
          Geographic Region &gt; Northern Hemisphere
        </placekey>
      </place>
    </keywords>
    <thelayid>
      <numthlay>
        4
      </numthlay>
      <layrname>
        <theme>
          <themekt>
            NASA Global Change Master Directory (GCMD) Science Keywords
          </themekt>
          <themekey>
            EARTH SCIENCE &gt; Cryosphere &gt; Sea Ice &gt; Ice Extent
          </themekey>
        </theme>
      </layrname>
      <layrname>
        <theme>
          <themekt>
            NASA Global Change Master Directory (GCMD) Science Keywords
          </themekt>
          <themekey>
            EARTH SCIENCE &gt; Cryosphere &gt; Snow/Ice &gt; Snow Cover
          </themekey>
        </theme>
      </layrname>
      <layrname>
        <theme>
          <themekt>
            NASA Global Change Master Directory (GCMD) Science Keywords
          </themekt>
          <themekey>
            EARTH SCIENCE &gt; Oceans &gt; Sea Ice &gt; Ice Extent
          </themekey>
        </theme>
      </layrname>
      <layrname>
        <theme>
          <themekt>
            NASA Global Change Master Directory (GCMD) Science Keywords
          </themekt>
          <themekey>
            EARTH SCIENCE &gt; Terrestrial Hydrosphere &gt; Snow/Ice &gt; Snow Cover
          </themekey>
        </theme>
      </layrname>
    </thelayid>
    <accconst>
      None
    </accconst>
    <useconst>
      None
    </useconst>
    <ptcontac>
      <cntinfo>
        <cntperp>
          <cntper>
            NSIDC DAAC USER SERVICES
          </cntper>
        </cntperp>
        <cntaddr>
          <addrtype>
            mailing
          </addrtype>
          <address>
            User Services
          </address>
          <address>
            National Snow and Ice Data Center
          </address>
          <address>
            CIRES, 449 UCB
          </address>
          <address>
            University of Colorado
          </address>
          <city>
            Boulder
          </city>
          <state>
            CO
          </state>
          <postal>
            80309-0449
          </postal>
        </cntaddr>
        <cntvoice>
          +1 (303)-492-6199
        </cntvoice>
        <cntfax>
          +1 (303)-492-2468
        </cntfax>
        <cntemail>
          nsidc@nsidc.org
        </cntemail>
      </cntinfo>
    </ptcontac>
  </idinfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>
            NSIDC Distributed Active Archive Center
          </cntorg>
          <cntper>
            NSIDC DAAC USER SERVICES
          </cntper>
        </cntorgp>
        <cntaddr>
          <addrtype>
            mailing
          </addrtype>
          <address>
            National Snow and Ice Data Center
          </address>
          <address>
            CIRES, 449 UCB
          </address>
          <address>
            University of Colorado
          </address>
          <city>
            Boulder
          </city>
          <state>
            CO
          </state>
          <postal>
            80309-0449
          </postal>
          <country>
            USA
          </country>
        </cntaddr>
        <cntvoice>
          +1 (303) 492-6199
        </cntvoice>
        <cntfax>
          +1 (303) 492-2468
        </cntfax>
        <cntemail>
          nsidc@nsidc.org
        </cntemail>
      </cntinfo>
    </distrib>
    <resdesc>
      NSIDC-0046
    </resdesc>
    <distliab>
      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.
    </distliab>
    <stdorder>
      <digform>
        <digtinfo>
          <formname>
            Flat binary (1-byte unsigned integer)
          </formname>
        </digtinfo>
        <digtopt>
          <onlinopt>
            <computer>
              <networka>
                <networkr>
                  ftp://sidads.colorado.edu/pub/DATASETS/snow_and_sea_ice/nsidc0046v03/
                </networkr>
              </networka>
            </computer>
          </onlinopt>
        </digtopt>
      </digform>
      <fees>
        None
      </fees>
    </stdorder>
  </distinfo>
  <metainfo>
    <metd>
      20070822
    </metd>
    <metrd>
      20050809
    </metrd>
    <metc>
      <cntinfo>
        <cntperp>
          <cntper>
            NSIDC DAAC USER SERVICES
          </cntper>
          <cntorg>
            NSIDC Distributed Active Archive Center
          </cntorg>
        </cntperp>
        <cntaddr>
          <addrtype>
            mailing
          </addrtype>
          <address>
            National Snow and Ice Data Center
          </address>
          <address>
            CIRES, 449 UCB
          </address>
          <address>
            University of Colorado
          </address>
          <city>
            Boulder
          </city>
          <state>
            CO
          </state>
          <postal>
            80309-0449
          </postal>
          <country>
            USA
          </country>
        </cntaddr>
        <cntvoice>
          +1 (303) 492-6199
        </cntvoice>
        <cntfax>
          +1 (303) 492-2468
        </cntfax>
        <cntemail>
          nsidc@nsidc.org
        </cntemail>
      </cntinfo>
    </metc>
    <metstdn>
      FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata
    </metstdn>
    <metstdv>
      FGDC-STD-012-2002
    </metstdv>
  </metainfo>
  
  
  
  
  
  
</metadata>
