@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix cfstdn: <https://vocab.met.no/CFSTDN/> .
@prefix gcmdsk: <https://vocab.met.no/GCMDSK/> .
@prefix dc: <http://purl.org/dc/terms/> .

<https://vocab.met.no/CFSTDN>
  skos:prefLabel "Climate and Forecast Standard Names"@en ;
  a skos:ConceptScheme ;
  skos:hasTopConcept cfstdn:ertel_potential_vorticity .

cfstdn:ertel_potential_vorticity
  skos:broadMatch gcmdsk:858a80ff-5aa4-4590-b2e2-e88a802a6ee4, gcmdsk:72edbeca-b608-4f2d-8aba-492c8e6615b8 ;
  skos:topConceptOf <https://vocab.met.no/CFSTDN> ;
  dc:source <http://cfconventions.org/Data/cf-standard-names/78/build/cf-standard-name-table.html> ;
  skos:exactMatch <http://vocab.nerc.ac.uk/collection/P07/current/CFSN0620/> ;
  skos:prefLabel "ertel_potential_vorticity"@en ;
  skos:inScheme <https://vocab.met.no/CFSTDN> ;
  skos:definition "The Ertel potential vorticity is the scalar product of the atmospheric absolute vorticity vector and the gradient of potential temperature. It is a conserved quantity in the absence of friction and heat sources [AMS Glossary, http://glossary.ametsoc.org/wiki/Ertel_potential_vorticity]. A frequently used simplification of the general Ertel potential vorticity considers the Earth rotation vector to have only a vertical component. Then, only the vertical contribution of the scalar product is calculated."@en ;
  a skos:Concept .