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This icon returns a GRIB field of one of the following : - potential temperature
- equivalent potential temperature
- saturated equivalent potential temperature
Inputs are temperature, logarithm of surface pressure (lnsp) (only if the input data is specified in model levels) and specific humidity (only if calculating equivalent potential temperature). See Holton, 3rd Ed, Appendix D, eq. D-9, for details on the scientific background The generated fields can be simply visualised or saved as GRIB files. | Info |
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From script ( Macro/Python ) the icon can be called via the following set of functions: pott_m() , eqpott_m(), seqpott_m(), pott_plp() , eqpott_plp() and seqpott_plp() (see description below). |
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To operate with this icon first you need to select which type of potential temperature field you want to create (parameter Application) then set the type of level of your input (parameter Level Type ). The available parameters will then change in the editor according to your selection.
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Please note that in In order to use this icon from script ( Macro/Python ) you ned to use a different function for each top level parameter combination. For model levels the corresponding set of functions are as follows: pott_m() , eqpott_m(), seqpott_m()
while for pressure levels the names are similar but take a different suffix: pott_plp() , eqpott_plp() and seqpott_plp()
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Lnsp
Specifies the lnsp field as a GRIB icon. Only available/required when Level Type is set to Model Levels.
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