wrf physics

Dear WRF Community, I’m currently troubleshooting a persistent crash in WRF v4.5 that consistently occurs after the third model day, with the following error: I'm running at 15 km resolution, using Noah-MP (sf_surface_physics=4) and the following physics setup: What I’ve Tried and Observed...

Hello all, I want to use mosaic landuse categories, firstly I tried Noah LSM and run wrf.exe successfully. But the results were not very good. So I want to test RUC LSM, but I got this following error: d01 2024-10-21_00:00:00 No average surface temperature for use with inland lakes Assume...

Hi all, I'm working on a WRF case study for the Huang-Huai-Hai Plain (China) and found that the simulated T2 (2m temperature) consistently shows significant errors compared to observed monthly mean values, with RMSE ranging from 2 to 4°C. Here are the cases that I have tested. Forced with ERA5...

integer,intent(in) :: nz !Maximum number of vertical levels in the urban grid real,intent(in) :: bl !Building length [m] real,intent(in) :: bw !Building width [m] real,intent(in) :: albr !albedo of the roof (ext.) real,intent(in) :: emr...

I wanted to add a new term in this parameterization. subroutine hsfluxpv(nz,n,bl,bw,albr,rs,swddif,emr,rl,tr,tair,sigma,hspv,eppv,pv_frac_roof,uout,vout,tpv,dt) ! implicit none ! ! Input variables ! integer,intent(in) :: nz !Maximum number of vertical levels in the urban...

Hello, I am wondering if there are prescribed aerosols value in WRF model (not WRF-Chem, WRF-Solar or WRF-ACI). If yes, where I could find those species & values, and is there an option that i can run the model without aerosols? When I use mp_physics_opt = 8, and RRTMG scheme for radiation, is...

Quick question about the WRF physics suite 'tropical' According to the users guide online bl_pbl_physics = 1 YSU; only works with sf_sfclay_physics=1 But for the tropical suite we are using sf_sfclay_physics=91. Is the users guide's table just out of date or does it have an error? Thanks

How do we use the LES mode in WRF. If we compile em_les, then we are unable to run real cases. And what are the output variables that are explicitly in WRF-L?

Dear WRF Support Team, I have a question regarding the temporal distribution of anthropogenic heat emissions (AHE) when using gridded AHE input from WPS versus AHE data specified in URBPARM.TBL. Specifically, do both methods adopt the same diurnal profile for AHE distribution? In the...

Hello! I am currently learning how to run an assimilation experiment of indirect soil nudging with the Pleim-Xiu Land Surface Model in WRFv4.4.2. There is very little information available online about soil nudging. I have only found a document related to the PX...

Hello! I'm currently trying to do parameterization on my WRF runs by editing certain constants in specific .F files inside the WRF/phys folder. The files I'm editing are: module_sf_sfclay.F module_cu_kfeta.F module_ra_sw.F module_ra_rrtm.F module_sf_noahlsm.F module_mp_wsm6.F module_bl_ysu.F...

Dear WRF Experts, In the earlier version of WRF, the constants and parameters are declared in the .F codes. For example, for the YSU PBL scheme: Link to YSU Physics module real,parameter :: xkzmin = 0.01,xkzmax = 1000.,rimin = -100. real,parameter :: rlam = 30.,prmin = 0.25,prmax =...

Hello, I recently went through the process of adding new variables to the registry from the thompson microphysics code. The variables I added are prr3d_sml, prr3d_gml, and prv3d_rev. These are 3-dimensional variables based off the prr_sml, prr_gml, and prv_rev one-dimensional variables that...

Hello all, In URBPARM_LCZ.TBL,we use IRHO((from 0 to 1 for each hour of the day): it allows to turn on drip irrigation over the roof, for the hours of the day desired. The value of 1 correspond to an irrigation of 25 L/m2/week, and lower values to its fraction.) to describe the irrigation in...

I am conducting BEP/BEM simulations in WRF and wondering whether increasing domain resolution (e.g., sub-kilometer) will significantly enhance the accuracy of key urban processes. Specifically, will higher resolution improve: Shading and Solar Radiation: Better capture of PV and building...

Hello everyone, I hope you are doing well. I have two questions about soil parameters. 1) Which namelist.input variables activate the use of soil parameters, or are they always used? I have been thinking that only some of the sf_surface_physics models use soil parameters. 2) In SOILPARM.TBL...

I am getting extreme negative values of ground heat flux when i simulate 100% PV. I have atatched my Urban file and namelist.input

Hi, I’m running WRF with the multi-layer urban scheme (BEP+BEM) using WUDAPT data to analyze the impact of urbanization for an Indian city. Since I don’t have specific urban morphology data for this city, I’m relying on the default parameters in the model. The estimated AC usage in this city...

Hi, I am trying to run the WRF_UCM model using the 41 MODIS land use categories. However, I encountered the following error while running geogrid.exe: marjan@Marjan:~/Models/WRF-CMAQ/WPS-4.5$ ./geogrid.exe Parsed 50 entries in GEOGRID.TBL Processing domain 1 of 3 ERROR: Could not open...

Hi, I am trying to run WRF-UCM for the 3 domains. After running the following command, it created geo_em.d01_41.nc, ..., geo_em.d03, geo_em.d03_NoUrban.nc, geo_em.d03_LCZ_extent.nc, geo_em.d03_LCZ_params.nc files. python /home/marjan/w2w/w2w/main.py -l 1...