WRDDA does not assimilate radar observations

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sekluzia
Posts: 187
Joined: Mon Oct 15, 2018 12:42 pm

WRDDA does not assimilate radar observations

Post by sekluzia » Tue Feb 26, 2019 6:35 pm

Dear Colleges,

I am trying to assimilate radar observations with WRFDA v4.0. I have radar observations in ascii format, our radar measures only radar reflectivity, and I assigned the reflectivity observational errors with 2.0 dBZ constant value (ob.radar file is attached). The namelist file is also attached. You can see in my log.out file (attached) that the WRFDA does not show any error, but no radar observations is assimilated. The format of ob.radar file should be correct. Could you please check? If there are wrong settings in my namelist file, please, let me know.
You can upload the fg file (fg.nc) from:

https://figshare.com/s/7e8f7464a4c0e1bdc1a4

Artur
Attachments
namelist.input.txt
(2.59 KiB) Downloaded 54 times
log.out.txt
(3.3 KiB) Downloaded 46 times
ob.radar.txt
(2.47 MiB) Downloaded 52 times

sekluzia
Posts: 187
Joined: Mon Oct 15, 2018 12:42 pm

Re: WRFDA does not assimilate radar observations

Post by sekluzia » Mon Mar 11, 2019 7:10 pm

Dear Colleges,

I managed to perform the radar assimilation with WRFDA-3DVAR.
However, after radar assimilation, the WRFDA shows humidity only around the radar reflectivity observation points, while showing zero humidity for the other part of the entire domain. Please, find attached the QVAPOR variable after radar assimilation at model level 25 (the same pattern is also for other model levels).
Please, also find attached my input and output files of radar assimilation.

Artur
Attachments
QVAPOR_in_wrfvar_output.jpg
radar_assimilation.tar.gz
(171.8 MiB) Downloaded 45 times

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