OpenIFS uses the so-called 'Gaussian grid' to represent variables in physical space. A Gaussian grid does not have regular latitude spacing but nearly so.
A Gaussian grid does not have a latitude at the equator, nor exactly at the poles. The latitudes are symmetric about the equator.
The model uses several representations of a Gaussian grid as explained below.
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Examples
Gaussian grid with 320 latitudes between pole and equator
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| FCST:Gaussian grid with 320 latitude lines between pole and equator |
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Gaussian grid with 640 latitudes between pole and equator
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| FCST:Gaussian grid with 640 latitude lines between pole and equator |
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Gaussian grid with 1280 latitudes between pole and equator
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| FCST:Gaussian grid with 1280 latitude lines between pole and equator |
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| nopanel | true |
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