The standard names of the coordinate variables, lat & long,
should somehow reflect that these observations are not
located on earth. Putting this into "some other metadata"
seems cavalier to me.

I'd like to see the word 'earth' inserted into the definitions of
lat & long. In the same way the time word identifies data from
the distant past or future - more explicitly than any global
attributes do - this would make it clear if data is from some
planet other than earth.

- Nan

On 1/26/11 7:03 AM, Jonathan Gregory wrote:
Dear Alison
...
With regard to John's question, I think there is no problem for using the same
standard names for Earth and Mars quantities if they refer to the same physical
quantities, just like we can use the same standard names for different future
scenarios for the Earth, or past geological periods. The Earth in the Cambrian
was not the same planet as the Earth today regarding all its climate and
geophysical circumstances (although not as different as Mars). The fact that
it is Mars is presumably made clear in some other metadata, which could be
standardised if necessary. The Earth as simulated by various climate models is
also not the same Earth as the one we live on - sometimes quite bizarrely
different - and these models are distinguished informally by global attributes.

Best wishes

Jonathan
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* Nan Galbraith                        (508) 289-2444 *
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