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 This icon derives (and returns) a Thermodynamic diagram data unit. In such 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.

The Thermo data can be plotted (using default plotting specifications) or saved as a NetCDF data file. The input data are observations (upper air BUFR) or model field (GRIB) data.

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

The

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Thermo Data Editor

The Tephigram Data editor belongs to a type of editor known as family editor which allows related sets of input specifications to be grouped in the same icon editor, each in its own tabbed pane (like the Simple Formula icon - see Figure III-3 on page III-71). The available working input panes are :

Pm Bufr Tephi - Provides input for tephigrams based on observation (BUFR) data.

Pm Grib Tephi - Provides input for tephigrams based on model field (GRIB) data post 4th April 1995

Pm Pre19950404Grib Tephi - Provides input for tephigrams based on model field (GRIB) data pre 4th April 1995

The two varieties of GRIB data tephigrams exist due to changes in the attributes of the input data - parameter Q changed to Gaussian Grid from Spherical Harmonics.

To operate with this icon first you need to select which output you want to produce by clicking the tab of the corresponding pane.

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Data

Drop any icon containing or returning BUFR data. This may be, for example, a MARS Retrieval (of observations) icon, a BUFR file icon or an Observation Filter icon (provided it outputs BUFR, not geopoints).

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