<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>24.6</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-08-19T10:58:35.072Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/a3f36d7c-4eed-4d7a-8902-a5fcdc1b6261</gcmd:viewer>
  </gcmd:gcmd>
  <skos:Concept rdf:about="a3f36d7c-4eed-4d7a-8902-a5fcdc1b6261">
    <skos:broader rdf:resource="8012fda7-3ea4-4ef2-bb4e-0f66d4d9e850"/>
    <dcterms:created>2015-11-23</dcterms:created>
    <skos:prefLabel xml:lang="en">ICE FRACTION</skos:prefLabel>
    <skos:changeNote>Date=2015-11-23 User Id=aaleman Entity=BroaderRelation Operation=INSERT 
User Note=Insert Concept
System Note=add broader relation
New Value=ICE FRACTION [a3f36d7c-4eed-4d7a-8902-a5fcdc1b6261,158489] - SEA ICE CONCENTRATION [8012fda7-3ea4-4ef2-bb4e-0f66d4d9e850,86237]</skos:changeNote>
    <skos:changeNote>Date=2017-03-15 User Id=mgenazzi Entity=Definition Operation=INSERT 
User Note=Definition added
System Note=insert Definition
New Value=id: null
text: Sea ice is described by the area it covers, its thickness, its age, and its movement with the winds and ocean currents. Concentration is a unitless term that describes the relative amount of area covered by ice, compared to some reference area. Thus, concentration describes how much of a 25.0 kilometer by 25.0 kilometer (15.5 mile by 15.5 mile) box is covered by sea ice. Ice concentration typically is reported as a percentage (0 to 100 percent ice), a fraction from 0 to 1, or sometimes in tenths (0/10 to 10/10). Our Sea Ice Index products show ice concentration as a percentage. A value of 0 means there is no ice, while a value of 100 means the region is completely covered by ice.
language code: en</skos:changeNote>
    <gcmd:reference gcmd:text="nsidc.org" xml:lang="en"/>
    <skos:definition xml:lang="en">Sea ice is described by the area it covers, its thickness, its age, and its movement with the winds and ocean currents. Concentration is a unitless term that describes the relative amount of area covered by ice, compared to some reference area. Thus, concentration describes how much of a 25.0 kilometer by 25.0 kilometer (15.5 mile by 15.5 mile) box is covered by sea ice. Ice concentration typically is reported as a percentage (0 to 100 percent ice), a fraction from 0 to 1, or sometimes in tenths (0/10 to 10/10). Our Sea Ice Index products show ice concentration as a percentage. A value of 0 means there is no ice, while a value of 100 means the region is completely covered by ice.</skos:definition>
    <dcterms:modified>2017-03-15 13:09:49.0</dcterms:modified>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords"/>
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