wrf physics

I am a graduate student currently studying WRF. I would like to perform LES simulations, but I’ve run into some difficulties, so I’m here to ask for your help. I would like to know the specific steps involved in running an LES simulation. Do I simply need to adjust the parameters corresponding...

Dear all, I am trying to run WRF-Chem with WRF-4.1.1, but I got segmentation fault like rsl.error.0000. I found that when I change the ra_lw_physics and ra_sw_physics, WRF-Chem goes wrong. And sf_sfclay_physics should be 91 or it goes wrong when it was set to 1. The other scheme is OK, but once...

Hi all, I'm writing to see if anyone has any idea what is going on with this error I am having running wrf.exe. Currently I am running a 1 day test for my setup using BEP+BEM. I am able to run WPS and real.exe with no issue but wrf.exe gives me this error: "FATAL ERROR... singular matrix in...

I've been using WRF v4.4.2 to run a 5-month simulation with 3-hour, 5-km resolution over North China, with Unified Noah LSM, mosaic option on, and single-layer urban canopy model (SLUCM, sf_urban_physics=1). The urban canopy parameter is from GloUCP (Liao et al, 2025), and the urban fraction...

I'm running WRF 4.7.1 with climatological aerosol data (QNWFA_QNIFA_QNBCA_SIGMA_MONTHLY.dat), I set qna_update=1 to update time-varying sfc aerosol emission, then file 'wrfqnainp_d01' was generated after real.exe, wrf.exe can successfully run till the end. But I found some warnings in rsl.error...

Hi, I'm adding microphysics source/sink terms to WRF output by modifying: Registry/Registry.EM_COMMON - Added variables (EPRDO, EPRDGO, etc.) phys/module_mp_morr_two_moment.F - Calculated variables in microphysics scheme phys/module_microphysics_driver.F - Passed variables through driver...

I am running the WRF model for an event using the urban physics scheme=1 and getting the below error. WRF model version: 4.5.2 Simulation period: 22/05/2024_00 to 27/05/2024_18 Timing for Writing wrfout_d02_2024-05-22_00:00:00 for domain 2: 0.52564 elapsed seconds Tile Strategy is...

Hello WRF community, I'm recently trying to run a simulation using Local Climate Zones (LCZ) using the CGLC_MODIS_LCZ_global (https://www2.mmm.ucar.edu/wrf/src/wps_files/cglc_modis_lcz_global.tar.gz) in WRF v4.4.3 and WPS v4.5. I used WPS v4.5, because only this version can read the CGLC, and...

Dear Community, I am encountering a persistent issue while running WRF v4.1 for tropical cyclone vortex tracking simulations. The model runs successfully with the WSM6 or WDM6 microphysics schemes, but crashes immediately upon execution when I switch to the Thompson microphysics scheme...

I run em_tropical_cyclone, and when I used grep "cfl" rsl.error.*, I encountered this error. Could you please tell me how to improve or fix it? Here is my namelist.input and rsl.error.0027. Thank you very much!

Dear all, I’m trying to run a WRF-Chem simulation to study the interaction between dust and ozone. My goal is to simulate both dust emissions and ozone chemistry in the same run and analyze their coupling effects. From previous posts, I’ve seen that it might be possible to activate both by...

Hello professor, I find the following lines in Registry.EM_COMMON: state real ZNT ij misc 1 - i3r "ZNT" "TIME-VARYING ROUGHNESS LENGTH" "m" state real CK ij misc 1 - r...

Hi, I am running a simulation over 3 domains (9-,3-,1-km) to examine the role of cloud radiative feedback on coastal convection. Following other threads, I have included the following: 1) icloud = 0 2) cu_rad_feedback = .false.,.false.,.false. 3) shallowcu_forced_ra = .false.,.false.,.false...

As a freshman, I am using WRF to process data and NCL to display 6h rainfall. However, the system shows 0mm of rainfall, which is actually incorrect. So I would like to know how to correctly display this data.

Hello all, I'm using WRF-Solar shcu_physics=5 (Deng) to simulate the shortwave radiation conditions over the whole China, but got a "segmentation fault" error, it seems like this error is related to the Deng shallow cumulus scheme. I'm not sure if I might have missed some parameter settings...

Hi, I've been researching the snow albedo effect recently and would like to turn it off by modifying module_sf_noahlsm.F. Do you have any suggestions, or is there detailed documentation about module_sf_noahlsm.F that I could refer to? Thank you very much!

Hello WRF community, I'm recently trying to run a short simulation using Local Climate Zones (LCZ) using the CGLC_MODIS_LCZ_global (https://www2.mmm.ucar.edu/wrf/src/wps_files/cglc_modis_lcz_global.tar.gz) in WRF v4.5.2. I have 3 domains, whose info in shared in the namelist files. I have...

I am currently interested in running an experiment that alters HFX and LH by a scalar via windspeed. For example, I want to add a scalar value to the windspeed that calculates the surface flux values, and to do this, I dug into module_sf_sfclay.F file and found where QFX/LH and HFX are...

real.exe runs successfully, but when I try to run wrf,exe gets the following error. Please help me to resolve this issue INITIALIZE THREE Noah LSM RELATED TABLES Input data is acceptable to use: WRF NUMBER OF TILES FROM OMP_GET_MAX_THREADS = 1 Tile Strategy is not specified. Assuming 1D-Y...

I am using WRF-BEP-BEM to simulate heatwave events. Case 1 uses double nesting, with resolutions of 9km and 3km respectively, and can operate normally. When Case 2 uses triple nesting, the simulation process crashes. The simulation area of Situation 2 is the same as that of Situation 1, except...