Hi Karl,
udunits 1 and 2 both recognise 'microatm' as '0.101325 m???kg?s??'.
You may be better off using 'microatmospheres', to be consistent between
using abbreviations and full names. ('microatmospheres' is recognised by
both udunits 1 & 2). Again, this is the sort of thing that it would be
nice to get a consensus on.
Cheers,
Andrew
Karl Taylor wrote:
> Hi all,
>
> Should I use microatm instead of uatm for a pressure unit in the CMIP5
> requested output list? Apparently this is the preferred unit for
> partial pressure of CO2 in seawater.
>
> Will the latest versions of udunits recognize it?
>
> thanks for any guidance,
> Karl
>
> On 26-Mar-10 8:52 AM, Andrew Clegg wrote:
>> Hi Julien,
>>
>> I'm glad you brought this up. We had a discussion about this recently
>> (look for any threads with 'udunits 1 or 2 for CF' in the title):
>> http://*mailman.cgd.ucar.edu/pipermail/cf-metadata/2010/thread.html
>>
>> The best solution (in my opinion) was to use expanded names rather
>> than shortened, so instead of using 'u' (which has been replaced by
>> '?' in udunits2) you would use 'micro' (which is compatible with
>> both). However it would be nice to get a consensus on this or another
>> solution, and some text added to the conventions.
>>
>> Cheers,
>> Andrew Clegg
>>
>>
>> Julien Demaria wrote:
>>> Hi,
>>>
>>> I found the "u" micro prefix abbreviation in the current CF-1.4
>>> documentation on units:
>>> http://*cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.html#units
>>>
>>>
>>> but it seems this prefix is not available in the last udunits-2
>>> (udunits-1 is now deprecated)
>>>
>>> and in udunits-2 they break backward compatibility because the "u"
>>> symbol is now used for a new unit "unified_atomic_mass_unit", see in
>>> http://*www.*unidata.ucar.edu/software/udunits/udunits-2/udunits2-accepted.xml
>>>
>>> http://*www.*unidata.ucar.edu/software/udunits/udunits-2/udunits2-prefixes.xml
>>>
>>>
>>> So what is the position of the CF community concerning this point,
>>> is the "u" micro prefix CF-1.4 compliant or not?
>>>
>>>
>>> Thanks in advance,
>>>
>>> Julien
>>>
>>> _______________________________________________
>>> CF-metadata mailing list
>>> CF-metadata at cgd.ucar.edu
>>> http://*mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>
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Received on Fri Mar 26 2010 - 10:52:15 GMT
