Created: April 8, 2020
Proposer: Beate Geyer
Proposed Date: 2020-03-11
Change Date: April 8, 2020, 9:44 a.m.
Term: potential_vorticity_of_atmosphere_layer
Unit: Pa-1 s-1
Unit ref: PPPS
"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.