wrf_physics

Problem: I ran my WRF simulation with sf_urban_physics =1 and sf_urban_physics =0 and seems to show no difference in T2. I also got no errors,warning, or faults in my rsl file. I am using WRF v4.6.0. I think the urban canopy model (UCM) is not activating because it does not finds valid urban...

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...

Hi, I am studying the melting of snow cover over the coast of West Antarctica. In an attempt to find a heat source of melting during the case study I discovered that it was mainly produced by “Freezing rain latent heat flux” (variable FLX2) as an uncompensated part of surface heat budget. In my...

I am getting below error while running wrf.exe over Himalayan region. (Please find attached namelist.input file which I am using.) Kindly suggest the solution on this. Thanks. ERROR: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0...

Hi all, I find these package declarations in Registry.EM_COMMON, for example: package thompson mp_physics==8 - moist:qv,qc,qr,qi,qs,qg;scalar:qni,qnr;state:re_cloud,re_ice,re_snow or package myjpblscheme bl_pbl_physics==2 -...

I wanted to know U value of roof or thickness of roof when using sf_urban_physics = 3. and how we can change it

Recently I have some questions adding variables to the fast_sbm file, the density (rho_phy) unit in this file is [kg m-3], and rhocgs unit should be [g m-3] because there is a statement 'rhocgs(I,K,J)=rho_phy(I,K,J)*0.001' in this file. Now the problems are coming, an example...

I want to add heat flux as initial forcing in WRF-SCM. But I have no idea how to do it. Should I specify heat flux in files like GABLS_II_forcing.txt, make_scm_forcing.ncl, forcing_file.cdl, input_soundig? If anyone knows about this, please let me know! thank you!!

Hi everyone, I have a question that's been on my mind: Is the ideal WRF test case hill2d_x capable of modeling snow? Specifically, I'm wondering if this can be achieved by modifying the initial sounding or by changing the microphysics option. Has anyone experimented with this or have any...

Hi, I'm using WRF-Chem to simulate air quality near urban centers and getting confused with a physical definition. I'm wondering the difference between ZA (defined as first atmospheric level as a lowest boundary condition in module_sf_urban.F under ./WRF/phys) and (PH+PHB)/9.8. I learnt from...

Hi I'm running WRF for one Cyclone case. It is three nested domains. I have lots of questions about how the settings would be more appropriate From what I have been reading, the met_em files are used for all the running period for D01 and for the other domains uses only met_em files for the...

Hello everyone, I am currently using WRF_NoahMP to conduct irrigation experiments. Since my case is not in the United States, I need to prepare the crop data myself. My process is as follows: 1. I have 1km planting data for three types of crops, using this data to calculate the crop fraction in...

I am having problems running WRF-Hydro with NLDAS regridded data (with NAN values replaced) and it shows the following in the diag_hydro.00000 file: t0OutputFlag: 1 read forcing data at 2024-02-01_00:00:00 . /Forcing/2024020101.LDASIN_DOMAIN1 name = "T20" the job is stopped due to the fatal...

Hi all, I'm planning a long-term WRF simulation (about 20 years, 2000-2020) using six-hourly input data from ERA5. I am considering two options: Running annually with restart files. Running each year in parallel with additional spin-up time (e.g., 2 weeks). Given that my input data remains...

Hi all, I was just wondering is there a way to provide a timeseries of z0 for a specific grid which WRF would then update in it's simulation every 1hr or any other given timestep? Is there a possibility of using Run-Time IO to somehow provide custom derived z0 to be used by wrf instead of wrf...

Hi everyone, My collagues and I have been trying to run WRF 4.5.1 in a HPC. We've noticed that when we use the MYNN2.5 scheme for pbl an error occurs. The simulations stops within its first 10 seconds before any timestep calculation even happens. Has anyone reported this before? 1. We are...

Hello, I am having a noise istarting from the beginning of the simulation while using WFP , i have no idea how to resolve it, i tried all the physics i have ! Can any one please help me how to get rid of it, it is creating this disruptancy in my child domain. the plot shown below is a...

Hi all, I am trying to run a terrain-sensitive experiment, to extract the mechanical effect of terrain only and does not consider the moist process. So, I plan to run a dry WRF experiment and then modify the terrain, is it a correct solution?(which should be similar to what is done by...

I am performing a sensitivity study to see the effect of cumulus parameterization (KF Scheme). I am using two nested domains; 30km and 10km (study area). I am performing two experiments where in control, I am running the model with KF Scheme and in test, I am switching it off in both domain...