based on the definitions it would be nice to see source_institution
(or institution_where_produced) and source_method (or
source_provenance), in order to avoid collisions. just a thought, I
know it's not CF-ish to imagine far-flung-future problems so feel free
to ignore it!
john
On Mar 23, 2010, at 12:11, Jonathan Gregory wrote:
Dear John
it sounds like a modest proposal is to recommend either of
these attributes to identify the ensemble coordinate variable:
axis = "ensemble";
standard_name = "realization";
with the idea of keeping it simple.
For auxiliary coordinate variables of the ensemble axis,
other standard names suggested are:
experiment_id, source, forcing, experiment, model, institution
To keep it simple again, I'd vote for just source and institution,
which
correspond to these existing global attributes of CF:
institution
Specifies where the original data was produced.
source
The method of production of the original data. If it was model-
generated,
source should name the model and its version, as specifically as
could be
useful.
But that doesn't have to be part of the trac proposal, as these are
proposals
for new standard names. The trac proposal could just say that the
ensemble
axis could have auxiliary coordinate variables supplying information
about the
ensemble members. When they come from different models, aux coord
variables
are probably a better way to describe than a coord variable of
"realization",
I suppose.
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