Dear Martin, Thank you for your proposal which has now been added to the list of standard names under discussion: http://cfeditor.ceda.ac.uk/proposals/1?status=active&namefilter=&proposerfilter=Claverie&descfilter=&unitfilter=&yearfilter=&filter+and+display=Filter.
fraction_of_absorbed_photosynthetically_active_radiation (canonical units 1) I agree with Jonathan that fraction_of_surface_downwelling_photosynthetic_radiative_flux_absorbed_by_vegetation would be consistent with existing names. Based on the definition you have provided and those of other "photosynthetic" names, the full definition of this name would currently read: 'The fraction of incoming solar radiation in the photosynthetically active radiation spectral region that is absorbed by a vegetation canopy. "Photosynthetic" radiation is the part of the spectrum which is used in photosynthesis e.g. 300-700 nm. The range of wavelengths could be specified precisely by the bounds of a coordinate of "radiation_wavelength".' The definition text does allow for some variation of the precise wavelengths involved, so I think you would probably be OK to use the suggested name and accompany your data variable with a radiation_wavelength coordinate variable and bounds appropriate to your particular case. Best wishes, Alison > -----Original Message----- > From: CF-metadata [mailto:[email protected]] On Behalf > Of Jonathan Gregory > Sent: 07 May 2015 16:18 > To: [email protected] > Subject: Re: [CF-metadata] New standard name request for FAPAR > > Dear Martin > > OK. If that is the correct assumption, maybe your new quantity could be > called > > fraction_of_surface_downwelling_photosynthetic_radiative_flux_absorbed > _by_vegetation > > Best wishes > > Jonathan > > > ----- Forwarded message from "Claverie, Martin (GSFC-6190)[Science > Collaborator]" <[email protected]> ----- > > > Date: Wed, 6 May 2015 17:50:01 +0000 > > From: "Claverie, Martin (GSFC-6190)[Science Collaborator]" > > <[email protected]> > > To: Jonathan Gregory <[email protected]>, "cf- > [email protected] > > Subject: RE: [CF-metadata] New standard name request for FAPAR > > > > Dear Jonathan > > > > I think your assumption is correct : "the fraction of the > [surface_downwelling_photosynthetic_radiative_flux_in_air] which is > absorbed by the vegetation". > > > > However I need to check that > surface_downwelling_photosynthetic_radiative_flux_in_air is equivalent to > what we called in my community the "Photosynthetically active radiation". > > > > If so, we could mention > surface_downwelling_photosynthetic_radiative_flux_in_air variable in the > FAPAR definition. > > > > ********** > > definition: > > The fraction of incoming solar radiation in the photosynthetically active > radiation spectral region (equivalent to > surface_downwelling_photosynthetic_radiative_flux_in_air) that is > absorbed by a vegetation canopy. > > ********** > > > > best regards > > > > Martin > > ________________________________________ > > From: Jonathan Gregory [[email protected]] > > Sent: Wednesday, May 06, 2015 1:30 PM > > To: [email protected] > > Cc: Claverie, Martin (GSFC-6190)[Science Collaborator] > > Subject: Re: [CF-metadata] New standard name request for FAPAR > > > > Dear Martin > > > > > I am proposing the following standard name for Fraction of Absorbed > > > Photosynthetically Active Radiation (FAPAR), which is a GCOS Essential > > > Climate Variable (ECV). > > > > > > standard name: > > > fraction_of_absorbed_photosynthetically_active_radiation > > > > > > definition: > > > The fraction of incoming solar radiation in the photosynthetically active > > > radiation spectral region that is absorbed by a vegetation canopy. > > > > > > canonical units: > > > 1 > > > > We have an existing standard name of > > surface_downwelling_photosynthetic_radiative_flux_in_air > > and I assume your proposal means the fraction of this which is absorbed > by > > the vegetation. Is that right? If so, it would be better to add to this > > existing name (without in_air, I think) to make the new one. > > > > Best wishes > > > > Jonathan > > ----- End forwarded message ----- > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ------ Alison Pamment Tel: +44 1235 778065 NCAS/Centre for Environmental Data Archival Email: [email protected] STFC Rutherford Appleton Laboratory R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
