Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

The WRF model is unable to capture the regional precipitation

L

linhai

New member
I am encountering an issue with my WRF simulation where it fails to produce any precipitation. I have configured and run the model for a specific domain of interest. Upon checking the output files, I found that the values for both RAINC and RAINNC are consistently zero throughout the simulation period.

However, a comparison with ERA5 reanalysis data for the identical time and location indicates significant precipitation. This discrepancy suggests a problem in my setup or configuration.I would be grateful for any insights into the possible causes of this problem.
 

Attachments

  • namelist.input
    4 KB · Views: 3
  • namelist.wps
    753 bytes · Views: 0
  • precipitation.png
    precipitation.png
    137.2 KB · Views: 2
  • wps_content.png
    wps_content.png
    286 KB · Views: 2
Based on your namelist, I suppose you run this case using ERA5 as input. Please let me know if I am wrong.

Since you turn off cumulus scheme, it is expected that RAINC==0. However, RAINC should not be zero.

Which version of WRF did you run? Is it WRF-ARW?
 
Ming Chen said:
Based on your namelist, I suppose you run this case using ERA5 as input. Please let me know if I am wrong.

Since you turn off cumulus scheme, it is expected that RAINC==0. However, RAINC should not be zero.

Which version of WRF did you run? Is it WRF-ARW?
Click to expand...
Thank you for your reply.

I am using WRF-ARW version 4.5, driven by ERA5 data. The results indeed show that both RAINC and RAINNC are zero. I have tried running the simulation with a cumulus scheme enabled, but the result was still the same: both RAINC and RAINNC remain zero.

For your reference, here is the list of input variables I selected from the ERA5 data:

Pressure-Level Data Selection for Initial Fields:

  • U-component of wind
  • V-component of wind
  • Temperature
  • Specific humidity
  • Geopotential
Single-Level Data Selection for Initial Fields:

  • 10m u-component of wind
  • 10m v-component of wind
  • 2m dewpoint temperature
  • 2m temperature
  • Mean sea level pressure
  • Sea surface temperature
  • Skin temperature
  • Surface pressure
  • Soil temperature level 1-4
  • Volumetric soil water layer 1-4
  • Snow density
  • Snow depth
  • Land-sea mask
  • Sea-ice cover
 
You must log in or register to reply here.
Top