[Met_help] [rt.rap.ucar.edu #88303] History for UNIT mismatch in grib file for APCP and netcdf file for Observation of precipitation by TRMM

[John Halley Gotway via RT]

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  Initial Request
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Sir,
I tried to run mode with the help of python script provided earlier.
This ran successfully. But in the .ps file I am getting a difference
in units for APCP( as kg/m^2) while it is mm( mentioned as NA) in
precipitation observed by TRMM for daily
(https://disc.gsfc.nasa.gov/information/glossary/58ac98c7cac5244b115f80e7/giovanni-parameter-definitions#TRMM_3B42_Daily_7_precipitation)
and pcp for 3 hourly
(https://disc.gsfc.nasa.gov/datacollection/TRMM_3B42_7.html).
.ps file is attached herewith for diagnosis.
Will there be any mistake If I proceed with the results with units mismatch.

-- 
Thanking You
With Best Regards
________________________
Dr. BIRANCHI  KUMAR  MAHALA
Asst. Prof., Mathematics
*Kalinga Institute of Industrial Technology,*
*Deemed to be University, Bhubaneswar*
*Mobile- 09861182688*


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  Complete Ticket History
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Subject: UNIT mismatch in grib file for APCP and netcdf file for Observation of precipitation by TRMM
From: Tara Jensen
Time: Wed Dec 26 08:51:54 2018

Biranchi,

I see you have concerns about the units displayed in the .ps file.
All MET
tools merely pass through whatever units are included in the field
metadata.  In Grib files, kg/m2 is the official units of precipitation
and
is equivalent to mm of water.  Therefore, the fields are in the same
units.

What question are you trying to address with running MODE?  If it is
how
well is the model predicting large scale precipitation patterns, then
you
configuration settings are possibly meaningful.  If it is how well is
the
model predicting the location and amount of locally heavy rainfall,
then I
would suggest decreasing the convolution radius to somewhere in the 1-
3
range and increase the convolution threshold to 5 or 6 (or higher).

Best Regards, Tara

On Sun, Dec 23, 2018 at 6:41 AM Biranchi Mahala via RT
<met_help at ucar.edu>
wrote:

>
> Sun Dec 23 06:41:03 2018: Request 88303 was acted upon.
> Transaction: Ticket created by biranchimahala at gmail.com
>        Queue: met_help
>      Subject: UNIT mismatch in grib file for APCP and netcdf file
for
> Observation of precipitation by TRMM
>        Owner: Nobody
>   Requestors: biranchimahala at gmail.com
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=88303 >
>
>
> Sir,
> I tried to run mode with the help of python script provided earlier.
> This ran successfully. But in the .ps file I am getting a difference
> in units for APCP( as kg/m^2) while it is mm( mentioned as NA) in
> precipitation observed by TRMM for daily
> (
>
https://disc.gsfc.nasa.gov/information/glossary/58ac98c7cac5244b115f80e7/giovanni-
parameter-definitions#TRMM_3B42_Daily_7_precipitation
> )
> and pcp for 3 hourly
> (https://disc.gsfc.nasa.gov/datacollection/TRMM_3B42_7.html).
> .ps file is attached herewith for diagnosis.
> Will there be any mistake If I proceed with the results with units
> mismatch.
>
> --
> Thanking You
> With Best Regards
> ________________________
> Dr. BIRANCHI  KUMAR  MAHALA
> Asst. Prof., Mathematics
> *Kalinga Institute of Industrial Technology,*
> *Deemed to be University, Bhubaneswar*
> *Mobile- 09861182688*
>
>

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tara Jensen
Project Manager II
NCAR RAL and DTC
PO Box 3000, Boulder, Colorado 80307 USA
+1 303-497-8479          jensen at ucar.edu

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