[CF-metadata] Direct radiation standard name

alison.pamment at stfc.ac.uk alison.pamment at stfc.ac.uk
Tue Feb 7 06:13:11 MST 2017


Dear Henry,

Thank you for your standard name proposals. I agree with Jonathan that these names fit will with existing ones and the definitions look fine.

direct_downwelling_shortwave_flux_in_air (canonical units: W m-2)
'Downwelling radiation is radiation from above. It does not mean "net downward". "Direct" (also known as "beam") radiation is radiation that has followed a direct path from the sun and is alternatively known as "direct insolation". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "shortwave" means shortwave radiation.'

surface_direct_downwelling_shortwave_flux_in_air (canonical units: W m-2)
'Downwelling radiation is radiation from above. It does not mean "net downward". "Direct" (also known as "beam") radiation is radiation that has followed a direct path from the sun and is alternatively known as "direct insolation". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The surface called "surface" means the lower boundary of the atmosphere. "shortwave" means shortwave radiation.'

These names are accepted for publication in the standard name table and will be added in the February update.

Best wishes,
Alison

------
Alison Pamment                                                       Tel: +44 1235 778065
Centre for Environmental Data Analysis         Email: alison.pamment at stfc.ac.uk
STFC Rutherford Appleton Laboratory     
R25, 2.22
Harwell Campus, Didcot, OX11 0QX, U.K.



> -----Original Message-----
> From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
> Jonathan Gregory
> Sent: 08 January 2017 21:32
> To: cf-metadata at cgd.ucar.edu
> Subject: [CF-metadata] Direct radiation standard name
> 
> Dear Henry
> 
> These seem fine to me, since there are existing names of exactly this form
> with "diffuse" instead of "direct".
> 
> Thanks
> 
> Jonathan
> 
> ----- Forwarded message from "Odbert, Henry"
> <henry.odbert at metoffice.gov.uk> -----
> 
> > Date: Fri, 6 Jan 2017 07:39:55 +0000
> > From: "Odbert, Henry" <henry.odbert at metoffice.gov.uk>
> > To: "'cf-metadata at cgd.ucar.edu'" <cf-metadata at cgd.ucar.edu>
> > Subject: [CF-metadata] Direct radiation standard name
> >
> > Dear all,
> >
> > I have been unable to find appropriate standard names for Direct (aka 'beam')
> shortwave radiation. Diffuse and Global SW radiation are listed already.
> >
> > Unless I've missed something, I suggest the following additions:
> >
> > direct_downwelling_shortwave_flux_in_air<javascript:void(0)> (unit: W m-2)
> > Downwelling radiation is radiation from above. It does not mean "net
> downward". When thought of as being incident on a surface, a radiative flux is
> sometimes called "irradiance". In addition, it is identical with the quantity
> measured by a cosine-collector light-meter and sometimes called "vector
> irradiance". In accordance with common usage in geophysical disciplines, "flux"
> implies per unit area, called "flux density" in physics. "shortwave" means
> shortwave radiation. "Direct" (also known as "beam") radiation is radiation that
> has followed a direct path from the sun and is alternatively known as "direct
> insolation".
> >
> > surface_direct_downwelling_shortwave_flux_in_air<javascript:void(0)> (unit:
> W m-2)
> > Downwelling radiation is radiation from above. It does not mean "net
> downward". "Direct" (also known as "beam") radiation is radiation that has
> followed a direct path from the sun and is alternatively known as "direct
> insolation". When thought of as being incident on a surface, a radiative flux is
> sometimes called "irradiance". In addition, it is identical with the quantity
> measured by a cosine-collector light-meter and sometimes called "vector
> irradiance". In accordance with common usage in geophysical disciplines, "flux"
> implies per unit area, called "flux density" in physics. The surface called
> "surface" means the lower boundary of the atmosphere. "shortwave" means
> shortwave radiation.
> >
> >
> >
> > Thank you
> > Henry
> >
> >
> > Dr Henry Odbert  Senior Post Processing Scientist
> > Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB  United Kingdom
> > Tel: +44 (0)1392 885164  Direct: +44 (0)7770 645044
> > Email:
> henry.odbert at metoffice.gov.uk<mailto:henry.odbert at metoffice.gov.uk>
> Website: www.metoffice.gov.uk<http://www.metoffice.gov.uk/>
> >
> 
> > _______________________________________________
> > CF-metadata mailing list
> > CF-metadata at cgd.ucar.edu
> > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
> 
> 
> ----- End forwarded message -----
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