@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/b6723314-3db7-4bdd-85ee-0b8507e6ae1b>
  skos:definition """(Also called perennially frozen ground, pergelisol, permanently frozen
ground.) A layer of soil or bedrock at a variable depth beneath the surface of
the earth in which the temperature has been below freezing continuously from a
few to several thousands of years. Permafrost exists where the summer heating
fails to descend to the base of the layer of frozen ground. A continuous
stratum of permafrost is found where the annual mean temperature is below about
5C (23F)."""@en ;
  skos:prefLabel "PERMAFROST"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/8073b62d-a2f3-4ad9-b619-de26f28877a7> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/8073b62d-a2f3-4ad9-b619-de26f28877a7>
  skos:prefLabel "FROZEN GROUND"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/b6723314-3db7-4bdd-85ee-0b8507e6ae1b> .