Diana User Guide: Field functions |  Previous: Setup file |  Next: Vertical crossection functions |  Index

Field computation/conversion functions

//----------------------------------------------------------------------
// Names used in functions:
//-------------------------
// plevel  = pressure levels
// hlevel  = model hybrid levels, eta/hybrid(hirlam,ecmwf,...) and sigma_norlam
// alevel  = model levels, any vertical coordinate with pressure field in each level
// ilevel  = isentrpoic levels (constant potential temperature levels)
// ozlevel = ocean depth levels
//----------
// Field names:
//-------------
// th    = potential temperature (Kelvin)
// tk    = temperature (Kelvin)
// tc    = temperature (Celsius)
// tx    = any temperature
// tdk   = dew point temperature (Kelvin)
// tdc   = dew point temperature (Celsius)
// rh    = relative humidity (%)
// q     = specific humidity (kg/kg)
// psurf = surface pressure (hPa) needed for hlevel functions
// p     = pressure (hPa) needed in all levels for alevel functions
// z     = height (m)
// mpot  = Montgomery potential (in isentropic surfaces)
// f     = any scalar field
// u,v   = wind components in grid x- and y-direction (m/s)
// salt  = water salt content in ppt
//----------
// Notes:
//----------
// Function argument and result names are just examples.
// "const:name" means a float or an int number.
// The last argument may be a variable number of constants; "const:name,..."
// Constants are after all input fields (except for the last simple functions).
// The number of result fields (1 or 2) is checked when the setup file is read.
//----------
// The real functions often need more arguments than used in setup.
// Like constant pressure, the hybrid eta.A and eta.B, map ratios and coriolis parameter fields.
// This is done automatic. Also the existence of any undefined/missing values in the input fields.
// ---------
// If the result field name also is among the input parameter/field names,
// the function will not be activated when the input field is found.
// The shortest "route" with fewest functions are chosen to make the final plot field.
//----------------------------------------------------------------------

Pressure level functions

Hybrid (eta) level functions

Atmospheric model level functions

Isentropic level functions

Ocean constant depth level functions

General (pressure/level independant) functions

Simple functions where one of the arguments (a or b) may be a constant

Diana User Guide: Field functions |  Previous: Setup file |  Next: Vertical crossection functions |  Index