reference_air_pressure_for_atmosphere_vertical_coordinate

complete
Created: Feb. 8, 2017
Proposer: Jonathan Gregory
Proposed Date: 2015-09-06
CF trac ticket 143 has been agreed.
Change Date: Feb. 8, 2017, 4:08 p.m.
Term: reference_air_pressure_for_atmosphere_vertical_coordinate
Unit: Pa
Unit ref: PASX
AMIP:
GRIB:
Change Date: July 4, 2017, 1:10 p.m.
Term: reference_air_pressure_for_atmosphere_vertical_coordinate
Unit: Pa
Unit ref: PASX
AMIP:
GRIB:
For models using a dimensionless vertical coordinate, for example, sigma, hybrid sigma-pressure or eta, the values of the vertical coordinate at the model levels are calculated relative to a reference level. "Reference air pressure" is the air pressure at the model reference level. It is a model-dependent constant.