Dear Jonathan,

Thank you for your input to resolve these proposed standard names. I agree with you that only one
of the proposals is appropriate for consideration as a standard name.
There are many existing standard names which use the phrase clear_sky for
a cloud-free area; to be consistent I would suggest clear_sky_area_fraction.
This is presumably 1-cloud_area_fraction.
As a follow up, then, we would like to propose the standard name, clear_sky_area_fraction, the definition
for which would be:

"X_area_fraction" means the fraction of horizontal area occupied by X. "X_area" means the horizontal area occupied by X within the grid cell. The clear_sky area fraction is for the whole atmosphere column, as seen from the surface or the top of the atmosphere.

Sincerely,

Gary

--
Gary Meehan
Senior Staff Scientist
Atmospheric and Environmental Research
131 Hartwell Avenue, Lexington, MA 02421-3126
Tel (781) 761-2228 .  Fax (781) 761-2299
e-mail: [email protected]

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