Hello All,

Stephane Senesi has raised the issue that some CMIP6 models may have a finite 
area of river water, and this should be recorded as an area type 
(https://github.com/cmip6dr/CMIP6_DataRequest_VariableDefinitions/issues/85). 
<https://github.com/cmip6dr/CMIP6_DataRequest_VariableDefinitions/issues/85>   
I suspect that such models may also represet lakes.

We could just add a "river" area type. Ideally, we should make clear how this 
relates to other area types. E.g. is "river" part of "land", or separate from 
it? The definition of the CMIP5 residualFrac variable implies that lakes are 
considered as part of land (though it is not clear whether this applies to all 
lakes, or just sub-grid scale lakes -- resolved by perhaps 1 or 2 CMIP5 models).

regards,
Martin

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