Dear Jonathan,
Yes, it should be 0C, not 0K.
I don't think the approach you suggest will work because what we need is the depth of the first 0C isotherm assuming surface temperature above 0C. We don't want the depth of the 0C isotherm in regions where the surface temperature is < 0C. I can't see any way to include these conditions in existing CF attributes, can you?
regards,
Martin
________________________________
From: CF-metadata <cf-metadata-bounces at cgd.ucar.edu> on behalf of Jonathan Gregory <j.m.gregory at reading.ac.uk>
Sent: 17 May 2018 17:30
To: cf-metadata at cgd.ucar.edu
Subject: [CF-metadata] Standard names for LS3MIP: 8 temporal changes + 1 feature depth
Dear Martin
All the change_over_time ones look fine to me, thanks.
> 2.1 dmlt Depth to soil thaw [m] (CliC)
> Depth from surface to the zero degree isotherm. Above this isotherm T > 0o, and below this line T < 0o.
>
> When the surface temperature is above 0K and there is frozen soil at some point beneath the surface, thawed_soil_depth is the distance from the surface to the first 0K isotherm. When there is no thawed soil layer, the parameter should be reported as missing.
>
> + Proposed: thawed_soil_depth
Could we use the standard_name of depth for this, with a coordinate
variable of soil_temperature=0degC?
(I think 0degC is intended above, not absolute zero)
Best wishes
Jonathan
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Received on Thu May 17 2018 - 11:26:58 BST
