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 <[email protected]> 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 <[email protected]> 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: [email protected] >>> _______________________________________________ >>> CF-metadata mailing list >>> [email protected] >>> 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: [email protected] > _______________________________________________ > CF-metadata mailing list > [email protected] > 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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