. . "difference_of_air_pressure_from_model_reference"@en . "2017-07-24 14:36:59.0" . . "2017-07-24 14:36:59.0" . "SDN:P07::CFSN0724" . . . "accepted"@en . "false" . . "" . "2" . "2" . "SDN:P07::CFSN0724" . . "In some atmosphere models, the difference of air pressure from model reference is a prognostic variable, instead of the air pressure itself. The model reference air pressure is a model-dependent constant. Air pressure is the force per unit area which would be exerted when the moving gas molecules of which the air is composed strike a theoretical surface of any orientation."@en . . . . "SDN:P07::CFSN0724" .