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This icon derives (and returns) a Thermodynamic diagram data unit. In such a diagram, temperature, humidity (represented by the dew point) and wind values are displayed with respect to pressure. There are mainly four different types of thermodynamic diagrams: Tephigram, Skew-T, Emagram and Stuve, but only the Tephigram diagram is currently implemented in Metview.

The Thermo Data icon can be plotted (using a default visualisation and with the plot area based on the range of data values) or saved as a NetCDF data file. The input data types are observation (upper air BUFR) or model field (GRIB) data.

If access to the output computed values is not required, or for more control of the plotting, use the icon Thermo View.

The macro language equivalents are thermo_bufr() and thermo_grib() (depending on the specified data type).


Specifies the parameter number of the V wind component, if the data is a non-ECMWF. ECMWF uses specific parameter numbers different from the WMO ones.