Just a quick comment on the proposed standard name
distance_from_sun (m)
It seems ambiguous to me, as a distance implies a measurement between two points, and this specifies only one.
As an example, in our datasets, we have variables like distance_from_sun_to_earth and distance_from_sun_to_satellite.
If distance_from_sun is to be a new standard name and not an attribute attached to solar_irradiance, I think the name should be more descriptive and possibly more specifically linked for its use with solar_irradiance.
Regards,
Tim Patterson
-----Original Message-----
From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: Monday, June 01, 2015 6:39 PM
To: cf-metadata at cgd.ucar.edu
Cc: Odele.Coddington at lasp.colorado.edu
Subject: Re: [CF-metadata] New standard name requests for TSI and SSI
Dear all
Few opinions still have been given about whether we should change flux to flux_density in standard names, and those few are a majority against doing so.
Since the proposers aren't happy with "flux" for "irradiance" in W m-2, I think the best compromise is
solar_irradiance (W m-2)
solar_irradiance_per_unit_wavelength (W m-3)
where the definition should note that "irradiance" means the power per unit area (called radiative flux in other standard names), the area being normal to a vector from the Sun to the Earth, and the quantity applies outside the atmosphere, by default at a distance of one astronomical unit from the Sun, but a coordinate or scalar coordinate variable of distance_from_sun can be specified to replace the default.
distance_from_sun (m)
is therefore also required as a new standard name.
Best wishes
Jonathan
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Received on Tue Jun 02 2015 - 09:09:22 BST
