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Comparing fields for consistency

Simulated visible imagery

The displayed cloud reflectance is a function of the total column cloud liquid water. When this is modelled too low the low clouds do not stand out well. The reflectance can be close to the reflectance from the surface and then clouds can’t be distinguished from terrain. 

Simulated water vapour imagery

Ideally, simulated water vapour images can be compared with water vapour imagery to allow an assessment of any departure of the analysed and forecast fields from reality.  The structure of the IFS model atmosphere may also be explored by comparing the water vapour imagery with the potential vorticity fields.  Currently satellite imagery is not available on ecCharts and comparison of observed and simulated imagery cannot be done directly.

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