meteocalcs — Meteorological Calculations

This module provides some helper functions for meteorological calculations such as Heat Index, Wind Chill, Evaporation etc.

Helper functions

meteocalcs.HeatIndex(Tc, RH)

Returns the Heat Index in Celsius degrees when Tc>=26.7 or else returns Tc. Tc is the mean air temperature in Celsius Degrees (e.g. 29.0), RH the Relative Hummydity in percent (e.g. 40). If Tc and/or RH are NaN, returns NaN as well.

meteocalcs.SSI(Tc, RH)

Returns the Summer Simmer Index in Celsius degrees when Tc>22 or else returns Tc. Tc is the mean air temperature in Celsius Degrees (e.g. 29.0), RH the Relative Hummydity in percent (e.g. 40). If Tc and/or RH are NaN, returns NaN as well.

meteocalcs.IDM(T, Precip[, is_annual=False])

Return the de Martonne Aridity Index. T in degrees C, Precip in mm. Precip is the cumulative preciptation for a month or a year respectively. If is_annual=False values should be monthly or else annual. If T and/or Precip are NaN, return NaN as well.

meteocalcs.BarometricFormula(T, Pb, hdiff)

Return the barometric pressure at a level

h if the pressure Pb at an altutde hb is given for

atmospheric temperature T, according to the

barometric formula. hdiff is h-hb.

If any of the arguments is Nan, return NaN as well.