Folks:
resending a post hoping someone can help me. see below.
very respectfully,
randy
On Apr 18, 2013, at 2:01 PM, rhorne at excaliburlabs.com wrote:
>
>
> Folks:
>
> The current definition for "atmosphere_optical_thickness_due_to_cloud" in the current standard name table is:
>
> The optical thickness is the integral along the path of radiation of a
> volume scattering/absorption/attenuation coefficient. The radiative flux
> is reduced by a factor exp(-optical_thickness) on traversing the path. A
> coordinate variable of radiation_wavelength or radiation_frequency can
> be specified to indicate that the optical thickness applies at specific
> wavelengths or frequencies. The atmosphere optical thickness applies to
> radiation passing through the entire atmosphere. The specification of a
> physical process by the phrase due_to_process means that the quantity
> named is a single term in a sum of terms which together compose the
> general quantity named by omitting the phrase.
>
>
> There are other "atmospheric_optical_thickness_due_to_<process>" standard names in the table, and they all have a clarifying sentence about the "<process>" part. The definition for "atmosphere_optical_thickness_due_to_cloud" does not have a clarifying sentence for what a cloud means.
>
> Is this a mistake ?
>
> If so, maybe the following changes should be made to the standard name table:
>
> (1)
> Add a standard_name "atmosphere_optical_thickness" and use the current definition for "atmosphere_optical_thickness_due_to_cloud" as identified above.
>
> (2)
> Change the definition of "atmosphere_optical_thickness_due_to_cloud" to be:
>
> The optical thickness is the integral along the path of radiation of a
> volume scattering/absorption/attenuation coefficient. The radiative flux
> is reduced by a factor exp(-optical_thickness) on traversing the path. A
> coordinate variable of radiation_wavelength or radiation_frequency can
> be specified to indicate that the optical thickness applies at specific
> wavelengths or frequencies. The atmosphere optical thickness applies to
> radiation passing through the entire atmosphere. "Cloud" means the
> component of extinction owing to the presence of liquid or ice water
> particles. The specification of a physical process by the phrase
> due_to_process means that the quantity named is a single term in a sum
> of terms which together compose the general quantity named by omitting
> the phrase.
>
> very respectfully,
>
> randy
>
>
>
>
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____________________________________
Randy C. Horne (rhorne at excaliburlabs.com)
Principal Engineer, Excalibur Laboratories Inc.
voice & fax: (321) 952.5100
url:
http://www.excaliburlabs.com
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Received on Mon Apr 29 2013 - 12:37:45 BST
