If we wanted to contain in a single file the results of a model run from
the past, through the present and into the future, I would use a single
variable, "time" to give the time coordinate to all time slices, valid
times. Presumably the application wants to use all of these as one
continuous run, or they would have been split into different files. The
extra information of when those different segments were launched should
be contained in extra variables which represent the times of launching
the runs. These datums, like "forecast_reference_time" would contain a
single date. But to introduce three time coordinate variables would be
a real headache.
Opps, there I go again argueing that datums are a necessary part of
metadata, in the same sense as units.
Tom Gross
From: ] On Behalf Of CJ Beegle-Krause
Sent: Wednesday, October 04, 2006 6:18 PM
To: John Caron
Cc: Ed Hartnett; cf-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] question and time and standard_name...
There is a need to distinguish whole or parts of model runs, for example
hindcast, nowcast and forecast could be sections of the same individual
model run. It would also be good to agree on what each of those terms
could mean.
John Caron wrote:
another one is "forecast_reference_time", the base time
a model run was made from.
Ed Hartnett wrote:
Howdy all!
The CF document says that standard_name may be
used for time
coordinate variables.
But the standard name table gives only one valid
standard_name for a
time variable: "time".
Can I assume then that there are no other
standard names for time
coordinate variables?
Thanks!
Ed
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