There are differences between the CF standard names on

http://cf-pcmdi.llnl.gov/documents/cf-standard-names/ecmwf-grib-mapping  
[CF document]

and

http://www.ecmwf.int/publications/manuals/d/gribapi/param/  [ECMWF 
site]  (click on the netcdf link for any particular parameter)

E.g. tcwv:

[CF document]:
GRIB code      Units ECMWF     CF   ECMWF description             CF 
Standard Name
137            m (of water)    m    Precipitable Water Content    
lwe_thickness_of_atmosphere_water_vapour_content

[ECMWF site] 
(http://www.ecmwf.int/publications/manuals/d/gribapi/param/detail/format=netcdf/pid=137/):
paramId      137
shortName    tcwv
name         Total column water vapour
unit         kg m**-2
description  Vertically integrated water vapour
cfname       lwe_thickness_of_atmosphere_water_vapor_content

The most important difference is the units, where the CF document says 
'm', and ECMWF says 'kg m**-2' (which is the correct unit for the tcwv 
parameter). Does the ECMWF parameter have an incorrect CF name or are 
the units in the CF document wrong?

I am also puzzled to see the spelling 'vapour', because I thought that 
the American spellings (vapor, color...) were the CF standard.


Jakob Malm
SMHI
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