[Go-essp-tech] CMIP5 - How to publish the same variable with two grids ?

[Karl Taylor]

Dear Stéphane,

You really should not alter the CMIP5 CMOR tables in any way (we record 
the checksums in the files I think, so we will know exactly which files 
were written using each table).

We have already provided guidance to a group wanting to write out ocean 
output on their native grid and on another grid after vertical 
interpolation.  We said they should create a special CMOR table for the 
second regridded data with a name of their choosing, and we urged them 
to choose a name that guaranteed uniqueness across the ESG archive.

You could do this for  tos and sic on the atmospheric grid.  By the way 
tos and ts should be identical except in regions of sea ice, and ts is 
already written on the atmospheric grid.

You might consider a table name like "CNRM-Amon" or "Amon-CNRM" which 
would then contain tos and ts.

Best regards,
Karl

On 7/13/11 7:37 AM, Stéphane Senesi wrote:
> Dear Karl and Bob
>
> We are concerned with the ease of use of CMIP5 data by various
> communities of users. Hence, we are considering providing some variables
> both on atmospheric and oceanic grids.
>
> For some variables/tables, we know that the ESG infrastructure will be
> OK : for instance, we can publish two additional  variables "tos" and
> "sic" in table Amon (and on the atmospheric grid), and the gateways will
> allow to discover it (we checked that already, with variable "albedo"
> and table 3hr). They are not in resquested output, and will not add much
> load to the ESG system (except for the disk space on our datanode)
>
> However, for those tables which do already mix realms, like the daily
> table, the solution is not that simple ; I assume that mixing files of
> the same realm with various grids in a single table would cause a mess
> in the system. We are here again concerned with variables "sic" and "tos"
>
> Can you see a way forward ?
>
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