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Issues and source files for CF controlled vocabularies
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Description of potential_vorticity_of_atmosphere_layer #187

Closed GeyerB closed 1 year ago

GeyerB commented 4 years ago

The given description lets unclear which definition of potential_vorticity was used when the standard_name was introduced. That should be clarified.

neumannd commented 4 years ago

The current definition for reference:

"Layer" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. Atmosphere potential vorticity is the vertically averaged absolute vorticity of a layer of the atmosphere divided by the pressure difference from the bottom to the top of the layer.

feggleton commented 4 years ago

Thank you Beate for your suggestion and thank you Daniel for posting the original definition for reference. I have added this proposed change to the editor (http://cfeditor.ceda.ac.uk/proposals/1), but currently, there has been no proposed additions or changes to the definition so any comments on this change would be welcomed.