[CF-metadata] New standard name request for FAPAR

From: Jonathan Gregory <j.m.gregory>
Date: Thu, 7 May 2015 16:17:39 +0100

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]" <martin.claverie at nasa.gov> -----

> Date: Wed, 6 May 2015 17:50:01 +0000
> From: "Claverie, Martin (GSFC-6190)[Science Collaborator]"
> <martin.claverie at nasa.gov>
> To: Jonathan Gregory <j.m.gregory at reading.ac.uk>, "cf-metadata at cgd.ucar.edu"
> <cf-metadata at cgd.ucar.edu>
> 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 [j.m.gregory at reading.ac.uk]
> Sent: Wednesday, May 06, 2015 1:30 PM
> To: cf-metadata at cgd.ucar.edu
> 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 -----
Received on Thu May 07 2015 - 09:17:39 BST