Dear CF Board:
I'd like to follow up on the definition of the standard name,
tropical_cyclone_eye_brightness_temperature,
based on discussions that we have been having in recent days concerning
certain standard name
definitions related to hurricane-related metrics.
To summarize:
standard name: tropical_cyclone_eye_brightness_temperature
Canonical Units: K
Definition:
The warmest brightness temperature value in the eye region of a tropical
cyclone derived using the
Advanced Dvorak Technique, based on satellite observations.
Brightness_temperature of a body
is the temperature of a black body which radiates the same power per
unit solid angle per unit area.
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 2/25/2014 6:44 AM, Gary Meehan wrote:
One clarification on the units of this proposed standard name, and
that is that the units should be
Kelvin, not Celsius.
Thanks and regards,
Gary
On 2/24/2014 6:42 AM, Gary Meehan wrote:
Dear Jonathan,
Just to summarize, then, the proposed standard name would thus be
tropical_cyclone_eye_brightness_temperature
Units: Celsius
Definition:
"tropical_cyclone_eye_brightness_temperature" means the warmest
brightness temperature value in the eye region
of a tropical cyclone (0 - 24 km from the storm center) derived using
the Advanced Dvorak Technique, based on
satellite observations.
Thanks and regards,
Gary
On 2/21/2014 5:36 PM, Jonathan Gregory wrote:
Dear Gary
It is actually the pixel with the warmest brightness temperature as
measured in a single IR band.
Beyond that, I do not think that one could specifically identify it
as SST, air temperature, etc.
OK. It would be all right, and more informative, to say
brightness_temperature
in your new name. brightness_temperature is an existing stdname.
Cheers
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: [email protected]
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