Dear Jonathan,
Thank you for your insight.
Here is how I would like to propose the definition for this new standard
name. Summarizing:
Standard_Name: radius_of_tropical_cyclone_central_dense_overcast_region
Canonical_Units: m
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 brightness temperature at top of atmosphere limit. The
threshold applied should be recorded
in a coordinate variable having the standard_name of
toa_brightness_temperature. A coordinate
variable of radiation_wavelength,
sensor_band_central_radiation_wavelength, or radiation_frequency
may be specified to indicate that the brightness temperature applies at
specific wavelengths or frequencies.
Sincerely,
Gary
On 4/23/2014 11:30 AM, Jonathan Gregory wrote:
> Dear Gary
>
> In your new definition, the threshold is not stated, and I agree that it better
> in principle. However it would be informative to record the threshold used, I
> imagine. This could be done like this:
>
>> 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.
> The threshold applied should be recorded in a coordinate variable having the
> standard_name of air_temperature_threshold.
>
> It could be a scalar or a size-one coordinate variable.
>
> Best wishes
>
> Jonathan
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--
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 25 2014 - 08:35:49 BST
