Dear Martin, Dear Jonathan,
I wonder whether there are applications, for which it might be
reasonable to distinguish between rivers (or more general "running
inland waters") and lakes?
The reasons for distinguishing between ocean and inland water
(primarily) are:
- ocean is a large flat area and impacts wind speed differently than
small inland lakes
- The ocean has a higher salinity and, hence, hosts different ecosystems
than inland waters. Therefore, the ocean emits other substances (or more
of them): sea salt, halogenated organic compounds, DMS, ...
Rivers and lakes also host different ecosystems. Additionally, the
air-water exchange might be more pronounced at the surface of running
waters. Therefore, it might be reasonable to have both individually.
Best wishes,
Daniel
On 09.05.2017 16:15, Jonathan Gregory wrote:
Dear Martin
As a suggestion, lakes and rivers together could be called "inland water" -
that is a commonly used phrase. I think it would be most naturally included in
the land area too.
Best wishes
Jonathan
----- Forwarded message from [email protected] -----
Date: Fri, 5 May 2017 14:00:16 +0000
From: [email protected]
To: [email protected]
CC: [email protected]
Subject: [CF-metadata] An area type for non-ocean water surfaces
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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