Jonathan,
Regarding using area vs latitude or longitude, I was following the third paragraph of section 7.3.4:
? For longitude, the domain is indicated according to this provision by the string "longitude" (rather than the name of a longitude coordinate variable), and this implies that the method applies to all possible longitudes ?
Am I right in thinking that your suggestion of using area instead would depend on how we are calculating the longitude and latitude?
Grace and peace,
Jim
Visit us on
Facebook Jim Biard
Research Scholar
Cooperative Institute for Climate and Satellites NC
North Carolina State University
NOAA's National Climatic Data Center
151 Patton Ave, Asheville, NC 28801
e: jbiard at cicsnc.org
o: +1 828 271 4900
On Mar 5, 2014, at 4:00 AM, Jonathan Gregory <j.m.gregory at reading.ac.uk> wrote:
> Dear Jim
>
>> We are attempting to follow section 9. The centroid of the weather system is calculated at each time step, and we are planning to use the longitude and latitude calculated as the coordinates of the system. So, for example, would the variables below be OK? (I?ve left out time and numerous other variables.)
>>
>> float lat(trajectory, obs)
>> :standard_name = ?latitude?
>> :axis = ?Y?
>> :cell_methods = ?latitude:mean (over system)?
>>
>> float lon(trajectory, obs)
>> :standard_name = ?longitude?
>> :axis = ?X?
>> :cell_methods = ?longitude:mean (over system)?
>>
>> float maxlat(trajectory, obs)
>> :cell_methods = ?latitude:maximum (over system)"
>>
>> float mtpwv(trajectory, obs)
>> :long_name = ?mean total precipitable water vapor?
>> :cell_methods = ?area:mean (over system)?
>
> I think the approach is OK but I would suggest for latitude and longitude
> "area: mean (over system)" and for maxlat "area: maximum (over system)". These
> indicate statistics of lat and lon which are calculated from the variation over
> the area of the system. Is that what you intend? The cell_methods is a blank-
> separated list of words, so there's a space after ":".
>
> Cheers
>
> Jonathan
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20140305/326dcb14/attachment-0001.html>
Received on Wed Mar 05 2014 - 07:05:45 GMT
