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[CF-metadata] new standard_name: lwe_thickness_of_water_vapor

From: Jonathan Wrotny <jwrotny>
Date: Tue, 14 May 2013 11:04:49 -0400

Dear John,

Excellent. Thanks for your consideration. I'm cc'ing the "cf-metadata"
address so that our dialogue gets posted to the archive.

-Jonathan

On 5/13/2013 5:25 PM, John Graybeal wrote:
> Great by me, thanks!
>
> On May 13, 2013, at 13:53, Jonathan Wrotny <jwrotny at aer.com
> <mailto:jwrotny at aer.com>> wrote:
>
>> Dear John,
>>
>> I am taking over this thread from Randy Horne (with his permission).
>>
>> Thanks for your reply regarding this new proposed standard name. I
>> concur that I should not have replaced the 'X' with the phrase from
>> the standard name, and also that the sentence defining the surface is
>> not relevant since the word 'surface' is not directly part of the
>> standard name.
>>
>> Also, I will reword the sentence attempting to discuss the vertical
>> column. The motivation for this sentence is to highlight that the
>> vertical column may not extend from the surface to the TOA (and does
>> not in the case of the GOES-R product that is motivating this
>> standard name proposal), but instead may extend over some specified
>> layer (for which the coordinate variable "air_pressure" will be
>> used). I agree that the wording of this sentence may be a little
>> garbled. Does the following definition improve upon the original?
>>
>> "lwe" means liquid water equivalent. The construction
>> lwe_thickness_of_X means the vertical extent of a layer of liquid
>> water if all the X in a vertical column was condensed. A coordinate
>> variable of air_pressure can be specified to define the levels of the
>> vertical column.
>>
>> Sincerely,
>>
>> Jonathan
>>
>> *From*: "John Graybeal" <graybeal at marinemetadata.org>
>> *Sent*: Friday, May 10, 2013 2:07 PM
>> *To*: rhorne at excaliburlabs.com
>> *Subject*: Re: [CF-metadata] new standard_name:
>> lwe_thickness_of_water_vapor
>>
>> Two definition observations, I think both related to the 'lwe_'
>> contribution.
>>
>> "The construction lwe_thickness_of_X means the vertical extent of a
>> layer of liquid water if all the atmospheric water vapor." Where did
>> the X get replaced by something in that phrase? Perhaps it should
>> read "if all the X"?
>>
>> The definition goes on about something not particularly relevant for
>> this standard name, the vertical column, and more confusingly "the
>> surface referes to the lower boundary of the atmosphere". In this
>> particular case, I presume the vertical column verbiage is associated
>> with the 'lwe_' part, but sometimes it doesn't fit/should be
>> replaced. For example: "In this case the vertical column is
>> unspecified, and so extends from the bottom to top of the
>> atmosphere." could replace everything after "The vertical column."
>>
>> John
>>
>>
>> On May 10, 2013, at 10:56, "rhorne at excaliburlabs.com
>> <mailto:rhorne at excaliburlabs.com>" <rhorne at excaliburlabs.com
>> <mailto:rhorne at excaliburlabs.com>> wrote:
>>
>>> Folks:
>>> Would like to propose the following:
>>> standard_name:
>>>
>>> lwe_thickness_of_water_vapor
>>>
>>>
>>> definition:
>>>
>>> "lwe" means liquid water equivalent. The construction
>>> lwe_thickness_of_X means the vertical extent of a layer of liquid
>>> water if all the atmospheric water vapor in a vertical column was
>>> condensed. The vertical column may extend from the surface to the
>>> top of the atmosphere, or between levels of the atmosphere. The
>>> surface refers to the lower boundary of the atmosphere.A coordinate
>>> variable of air_pressure can be specified to specify levels of the
>>> atmosphere.
>>>
>>>
>>> units:
>>>
>>> m
>>>
>>> very respectfully,
>>>
>>>
>>> randy
>>>
>>> _______________________________________________
>>> CF-metadata mailing list
>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>
>>
>> ---------------
>> John Graybeal
>> Marine Metadata Interoperability Project: http://marinemetadata.org
>> <http://marinemetadata.org/>
>> graybeal at marinemetadata.org <mailto:graybeal at marinemetadata.org>
>>
>
>
> ---------------
> John Graybeal
> Marine Metadata Interoperability Project: http://marinemetadata.org
> graybeal at marinemetadata.org <mailto:graybeal at marinemetadata.org>
>
>
>
>

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