About: ertel_potential

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An Entity of Type : skos:Concept, within Data Space : foodie-cloud.org, foodie-cloud.org associated with source document(s)

Attributes	Values
type	Concept
versionInfo	3
sameAs	ertel_potential_vorticity ertel_potential_vorticity
has broader	http://vocab.nerc.ac.uk/collection/P04/current/G254/ http://vocab.nerc.ac.uk/collection/P64/current/G254/
preferred label	ertel_potential_vorticity (en)
Identifier	SDN:P07::CFSN0620
dc:identifier	SDN:P07::CFSN0620
Date	2024-05-20 20:39:49.0
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. It is strongly recommended that a variable with this standard name should have the attribute units_metadata="temperature: difference", meaning that it refers to temperature differences and implying that the origin of the temperature scale is irrelevant, because it is essential to know whether a temperature is on-scale or a difference in order to convert the units correctly (cf. https://cfconventions.org/cf-conventions/cf-conventions.html#temperature-units). (en)
notation	SDN:P07::CFSN0620
alternative label
owl:deprecated	false
note	accepted (en)
void:inDataset	http://vocab.nerc.ac.uk/.well-known/void
has related	http://vocab.nerc.ac.uk/collection/P04/current/G985/ http://vocab.nerc.ac.uk/collection/P06/current/KMSS/ http://vocab.nerc.ac.uk/collection/P64/current/G985/
http://purl.org/pav/authoredOn	2024-05-20 20:39:49.0
http://purl.org/pav/hasCurrentVersion	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0620/3/
http://purl.org/pav/hasVersion	http://vocab.nerc.ac.uk/collection/P07/current/CFSN0620/1/ http://vocab.nerc.ac.uk/collection/P07/current/CFSN0620/2/
http://purl.org/pav/version	3
is sameAs of	ertel_potential_vorticity
is has member of	Climate and Forecast Standard Names

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