Dear Young-In,
Apologies for the delay in responding to your standard names proposals.
The names surface_longwave_emissivity and radiation_frequency were also
proposed in the mailing list thread 'Proposal of standard names for
cloud/precip properties' and have been accepted for inclusion in the
standard name table. Your proposal for surface_microwave_emissivity,
along with the details of the frequencies that you have previously
provided is now also accepted. It will be added to the standard name
table at the next update.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre Fax: +44 1235 446314
Rutherford Appleton Laboratory Email: alison.pamment at stfc.ac.uk
Chilton, Didcot, OX11 0QX, U.K.
> -----Original Message-----
> From: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-
> bounces at cgd.ucar.edu] On Behalf Of Won, Young-In (GSFC-610.2)[RSIS]
> Sent: 03 February 2009 00:21
> To: Jonathan Gregory; cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Emissivity not found in the current
> standardnametable
>
> Dear All,
>
> I would like to propose two (three for the dimension) new standard
> names
> as follows.
>
> 1. name: surface_longwave_emissivity
> canonical unit: 1 ( unitless number between 0 and 1)
> definition: The ratio of energy radiated by the Earth's surface to
> energy radiated by a black body at the same temperature in longwave
> region.
>
> 2. surface_mircrowave_emissivity
> canonical unit: 1 ( unitless number between 0 and 1)
> definition: The ratio of energy radiated by the Earth's surface to
> energy radiated by a black body at the same temperature in microwave
> frequency region.
>
> 3. name: radiation_frequency (alias: electromagnetic_frequency)
> canonical unit: hertz;
> definition: The radiation frequency can refer to any
> electromagnetic
> frequency, such as light, heat radiation and radio waves
> (copied and modified from "radiation_wavelength". I need
> "radiaton_frequency" because the emissivity in our data set is given
at
> specific frequency).
>
> Thanks,
>
> Young-In
> ----------------------------------------------------
> Young-In Won, Ph.D.
> NASA Goddard Space Flight Center
> Mail stop: 610.2
> Greenbelt, MD 20771
> (301) 614 6749 (O)
> (301) 614 5268 (F)
> young-in.won at nasa.gov
>
>
> -----Original Message-----
> From: Won, Young-In (GSFC-610.2)[RSIS]
> Sent: Monday, February 02, 2009 4:01 PM
> To: 'Jonathan Gregory'; cf-metadata at cgd.ucar.edu
> Subject: RE: [CF-metadata] Emissivity not found in the current
standard
> nametable
>
>
> Dear Jonathan,
>
> The Surface microwave emissivity is for 1 x1 degree gridded data at
> three different wavelengths (23.8, 50.3 and 89.0 GHz). So, I suppose
it
> can be written as (in CDL form, assuming the variable name "EmisMW"
> and
> its dimension "MWEmisLvls"),
>
> dimensions:
> lat = 180 ;
> lon = 360 ;
> MWEmisLvls =3 ;
>
> variables:
> float MWEmisLvls(MWEmisLvls)
> MWEmisLvls:standard_name="radiation_wavelength"; cannot
> find
> radiation_frequency, but should be O.K.
> MWEmisLvls:units="GHz";
>
> float EmisMW(MWEmisLvls, lat, lon) ;
> EmisMW: _FillValue=-9999.f;
> EmisMW: long_name="Microwave spectral emissivity";
> EmisMW: standard_name="surface_microwave_emissivity";
> data:
> MWEmisLvls = 23.8, 50.3, 89.0;
>
> (I skippped lat, lon as those are straitforward)
>
> Young-In
>
>
> -----Original Message-----
> From: cf-metadata-bounces at cgd.ucar.edu
> [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Jonathan
Gregory
> Sent: Friday, January 30, 2009 3:53 AM
> To: cf-metadata at cgd.ucar.edu
> Subject: [CF-metadata] Emissivity not found in the current standard
> nametable
>
> Dear Young-In
>
> Yes, by analogy with surface_albedo, I think surface_emissivity would
> be
> fine.
>
> > - surface_ir_emissivity (or surface_longwave_emissivity)
> It should be longwave, for consistence with other names.
>
> > - surface_microwave_emissivity,
> I think microwave would be OK; it would need a definition. You could
> also have plain surface_emissivity and provide a (perhaps scalar)
> coordinate variable of radiation_wavelength with bounds to specify the
> range to which it applies precisely.
>
> Cheers
>
> Jonathan
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Received on Fri Jun 05 2009 - 06:52:57 BST
