Vijayan Gv

7 Questions 3 Answers 0 Followers

Questions related from Vijayan Gv

How to change the initial conditions while running WRF?

Hi, I would like to run a few numerical experiments with WRF where I change some initial conditions, for eg. the wind shear and study the effects it has on the simulation of various atmospheric...

29 March 2022 2,700 4 View

What are the considerations to be made while deciding domain configurations?

Hi, I am trying to run WRF with three nested domains of resolutions 18km, 6km and 2km. I need the extent of the outermost domain to be 80 degrees longitudinally, ie from east to west, and 55...

28 December 2021 850 4 View

How to generate ensemble forecasts to be used with WRF genbe to generate background error?

Hi, I would like to generate background error using ensemble perturbation method. I am using WRF's genbe module. I am fairly new to modeling and I have no idea how to generate the ensemble...

02 September 2021 7,236 1 View

No change in background fields after assimilation (4dvar) of gps ztd data, even for singleob test. How to fix this?

Hi, I am trying to assimilate gps ztd data using 4dvar and cv option 3. WRF var runs successfully and wrfvar_output is created but there aren't any increments at all. To check if wrfda is working,...

04 August 2021 4,319 0 View

How do we decide the eta levels we should use?

Hi, I am trying to set up WRF model and I would like to specify explicit eta levels. My study will primarily be focused on storms and the boundary layer, so ideally, I would like to have very...

23 March 2021 1,881 4 View

What should be the QC index for the radar data file used for WRFDA?

Hi, I am trying to do radar data assimilation using WRF 3DVar. I would like to know how to decide what the QC index should be set to. Please help me out. Thankyou.

31 May 2020 7,165 0 View

Is the daily IMD gridded rainfall data, the accumulated precipitation from 00 UTC or 03 UTC?

I am using IMD gridded daily rainfall data (0.25 deg x 0.25 deg resolution) that has been made freely downloadable. Is the daily accumulated precipitation measured / calculated from 00UTC on that...

03 May 2020 9,600 1 View