Hi John,
Thank you for your feedback. Let me propose the following amended
definition.
The average radius of a central region of clouds in tropical cyclones
lacking well-defined eye features
which is computed by averaging the great circle distance in four
cardinal directions. The radius
in each direction is measured from the estimated storm center position
to a warm point that exceeds
a threshold temperature limit.
Sincerely,
Gary
On 4/16/2014 2:24 PM, John Graybeal wrote:
> Hi Gary,
>
> I get a little nervous about re-usability when I see specific numbers (like 300km and -30C) in a definition. They prompt two questions:
> 1) Is it clear that the community always uses these exact numbers (or so often that they are a de facto standard)?
> 2) Why is it necessary to say 'to pixels within 300km'? Why isn't the temperature limit enough?
>
> John
>
> On Apr 16, 2014, at 11:13, Gary Meehan<gmeehan at aer.com> wrote:
>
>> Dear CF Board,
>>
>> I would like to propose the following standard name.
>>
>> Standard Name: radius_of_tropical_cyclone_central_dense_overcast_region
>>
>> Dimensions: meter
>>
>> Definition:
>> The average radius of a central region of clouds in tropical cyclones
>> lacking well-defined eye features. The radius is computed by averaging
>> the great circle distance in four cardinal directions from the estimated
>> storm center position to pixels within 300km, where cloud top brightness
>> temperature first exceeds -30 Celsius.
>>
>> Sincerely,
>>
>> Gary Meehan
>>
>> --
>> 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
> Marine Data Manager
>
> M +1 408 675-5445
> skype: graybealski
> Marinexplore
> 920 Stewart Drive
> Sunnyvale 94085
> California, USA
> www.marinexplore.com
>
> _______________________________________________
> CF-metadata mailing list
> CF-metadata at cgd.ucar.edu
> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
--
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
Received on Fri Apr 18 2014 - 05:27:48 BST
