Hello Jonathan
> Do you mean "The expected length of the realization coordinate and dimension, if the whole ensemble *was* present"? I mean, is the whole ensemble present or not? I'm sorry, I'm not clear what you mean still.
In my use case, the whole ensemble is not present, I only have a subset of the members. I have a metadata element telling me how many members there were at the time the ensemble was created, which I would like to encode.
thank you
mark
________________________________________
From: CF-metadata [cf-metadata-bounces at cgd.ucar.edu] on behalf of Jonathan Gregory [j.m.gregory at reading.ac.uk]
Sent: 07 October 2014 15:31
To: cf-metadata at cgd.ucar.edu
Subject: [CF-metadata] FW: realization | x of n
Dear Mark
> This is an explicit piece of metadata which is provided by some systems and models and is applied to the ensemble collection, rather than statistics derived from that collection.
>
> In most cases there will be no CellMethod but there will be a realization dimension and coordinate.
>
> This piece of metadata could be considered to be:
> 'The expected length of the realization coordinate and dimension, if the whole ensemble collection is present.'
>
> This is preserved during subset operations, so that I may be looking one ensemble member, with a realization coordinate value of 4, but I know that this is from an ensemble of 17 members.
>
> This is useful metadata which is available from some models and we would like to preserve it in a standardised way in our CF NetCDF data sets.
Do you mean "The expected length of the realization coordinate and dimension,
if the whole ensemble *was* present"? I mean, is the whole ensemble present
or not? I'm sorry, I'm not clear what you mean still.
If the whole ensemble *is* present, then isn't the number of ensemble members
equal to the size of the ensemble dimension, as Jim said?
Cheers
Jonathan
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Received on Mon Oct 13 2014 - 07:20:22 BST
