I find that text an improvement, though I expect the pattern CF will look for is one that can appear anywhere 'due_to_' appears. Perhaps something like (this still needs improving)
The phrase 'due_to_x' means this specific quantity may be considered one contributor to the general quantity that appears before the due_to phrase.
john
On Jan 10, 2014, at 10:34, Gary Meehan <gmeehan at aer.com> wrote:
> Dear CF Board,
>
> I wish to close the loop on this subject held a few weeks back, in which I proposed amending the definition
> to the standard name, atmosphere_optical_thickness_due_to_cloud, by introducing the following clarification
> sentence:
>
> "Cloud" means the component of extinction owing to the presence of liquid or ice water particles.
>
> John Graybeal affirmed this proposal, but I am not sure if this is considered to still be an open issue. John raised
> an excellent point, questioning if 'cloud' should be considered to be a process. Perhaps this can be circumvented
> by amending the last sentence to read:
>
> The quantity named may be considered a single term in a sum of terms which, together, compose the general quantity,
> atmosphere_optical_thickness.
>
> Thus, removing the concept of a process, altogether.
>
> Sincerely,
>
> Gary Meehan
>
> On 12/19/2013 1:59 PM, John Graybeal wrote:
>> All of this makes sense to me.
>>
>> It prompts me to ask: Is 'cloud' actually a process? Or should the standard due_to definition clause be updated to include process or substance?
>>
>> John
>>
>> On Dec 19, 2013, at 09:49, Gary Meehan <gmeehan at aer.com> wrote:
>>
>>> Dear CF board,
>>>
>>> I would like to close the loop on a question posed this past April pertaining to the definition associated with the standard name,
>>> atmosphere_optical_thickness_due_to_cloud. At the time, it was observed by the original poster that the definition of this standard
>>> name does not make a connection to the presence of cloud contributing to the atmosphere optical thickness quantity. As a result, it was
>>> proposed that the definition of this standard name be amended by introducing the sentence "Cloud means the component
>>> of extinction owing to the presence of liquid or ice water particles." The definition of this standard name, in its entirety, would thus read as follows:
>>>
>>> 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.
>>>
>>> The goal of re-posting this question to the Board is to inquire if it feels that an update to the definition is warranted, and if
>>> the proposed wording is thus acceptable. Updating the definition in this manner would make it consistent with the definitions
>>> of the other atmosphere_optical_thickness_due_to_<process> standard names.
>>>
>>> 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: gmeehan at aer.com
>>> _______________________________________________
>>> CF-metadata mailing list
>>> CF-metadata at cgd.ucar.edu
>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>
>> ------------------------------------
>> John Graybeal
>> Sr. Data Manager, Metadata & Semantics
>>
>> M +1 408 675-5445
>> skype: graybealski
>> Marinexplore
>> 920 Stewart Drive
>> Sunnyvale 94085
>> California, USA
>> www.marinexplore.com
>>
>
>
> --
> 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: gmeehan at aer.com
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
------------------------------------
John Graybeal
Sr. Data Manager, Metadata & Semantics
M +1 408 675-5445
skype: graybealski
Marinexplore
920 Stewart Drive
Sunnyvale 94085
California, USA
www.marinexplore.com
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