[CF-metadata] New reflectance standard names

From: Jonathan Gregory <j.m.gregory>
Date: Thu, 24 Jan 2019 22:16:00 +0000

Dear Jonathan

I'm not familiar with the Lambertian equivalent albedo. Probably this was
explained when we discussed it before and I have forgotten! However what you
write makes sense to me and the names look OK, apart from a minor point that
I think cosine_of would be better, like square_of, derivative_of and other
phrases naming functions.

I expect the previous discussion got overlooked accidentally. Sorry about that.
If no-one has any concerns now, Alison will consider the names for inclusion in
the next release of the table, in due course - she does this quite frequently.

Best wishes

Jonathan

----- Forwarded message from Jonathan Wrotny - NOAA Affiliate <jonathan.wrotny at noaa.gov> -----

> Date: Thu, 24 Jan 2019 15:46:46 -0500
> From: Jonathan Wrotny - NOAA Affiliate <jonathan.wrotny at noaa.gov>
> To: "Kennelly, Edward" <ekennell at aer.com>, j.m.gregory at reading.ac.uk
> Cc: cf-metadata at cgd.ucar.edu
> Subject: [CF-metadata] New reflectance standard names
>
> Hello Jonathan Gregory (and CF board):
>
> I work for the GOES-R satellite project, and I have been revisiting some
> proposed standard names that were previously submitted by people who work
> for GOES-R but the proposals did not reach the final stage to be approved
> as new or modified standard names. One of these proposal was for two
> standard names submitted by Ted Kennelly:
>
> ?toa_lambertian_equivalent_albedo?
>
> ?Albedo is the ratio of the outgoing to the incoming power per unit area
> (irradiance). A coordinate variable can be used to specify the radiation
> wavelength or frequency. ?toa? means top of atmosphere.
> ?lambertian_equivalent? means the quantity is evaluated for a diffusely
> reflecting surface.?
>
> canonical units = 1
>
>
> ?toa_lambertian_equivalent_albedo_multiplied_by_cosine_solar_zenith_angle?
>
> ?Albedo is the ratio of the outgoing to the incoming power per unit area
> (irradiance). A coordinate variable can be used to specify the radiation
> wavelength or frequency. ?toa? means top of atmosphere.
> ?lambertian_equivalent? means the quantity is evaluated for a diffusely
> reflecting surface. ?multiplied_by_cosine_solar_zenith_angle? means that
> the quantity has normalized to remove the angular dependence of the
> incoming shortwave irradiance?
>
> canonical units = 1
>
> Based on my review of the CF metadata archive, there was some discussion
> about the two new proposed names between Ted and Jonathan Gregory and some
> agreement between them that they were valid proposed names, but I'm not
> seeing any additional comments be other members of the community. These
> discussions were also back in 2013.
>
> What else is required for these two proposed names to be approved? Thank
> you. Sincerely,
>
> Jonathan

----- End forwarded message -----
Received on Thu Jan 24 2019 - 15:16:00 GMT