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Now save your VAPOR Prepare icon then right click Execute to run the conversion. The will first turn orange then green when the conversion finishes.
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Visualisation
Right click Visualise your VAPOR Prepare icon to start up VAPOR. You will see this window popping up:
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Having set up the view we can now visualise our data. E.g. try the DVR (Direct Volume Rendering) tab, select Variable to relative humidity (r), tick Instance 1. Then set Refinement Level to 2 and change the opacity in Transfer Function editor to get this scene:
Giving further instructions and explaining further details about VAPOR visualisation goes beyond the scope of this tutorial. Here we just show a gallery few snapshots made with VAPOR to demonstrate the different ways VAPOR can visualise 3D data. For an in depth introduction please study the VAPOR tutorials at:
https://www.vapor.ucar.edu/docs/vapor-tutorials
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Using model level data
This exercise demonstrate how to use model level ECMWF GRIB data with VAPOR. We will work with fields from yesterday's forecast on a low resolution grid over Europe. The steps required are very similar to the previous exercise (with pressure levels) to only exception is the handling of geopotential.
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Although geopotential (z)is not available on model levels in the input data VAPOR Prepare computes it automatically if tempreature (t), specific humidity (q) and logarithm of surface pressure (lnsp) are available. Geopotential is then gets converted into metres units and renamed to ELEVATION. |
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Now save your VAPOR Prepare icon then right click Execute to run the conversion. The icon will first turn orange then green when the conversion finishes.
Visualisation
Right-click on the VAPOR icon and Execute to runVisualisation can be done similarly to what was discussed for pressure level data.