wrf_physics

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...

Hello everyone, I am interested in precipitation output from WRF. Currently I am defining my domains and I would like to ask if nested domains of 15km and 5km are a suitable choice for precipitation? Additionally, I am unsure if I need to activate the cumulus scheme for both domains, or only for...

Hi there, I have been trying to find the variable for Specific Humidity (sph) at single level/ pressure levels from the output files. Does it come with any specific parameterization schemes.? Although I tried some combinations and have not been able to find it Thank you so much for your time...

Hello, I understand that wrf.getvar will give both the speed (dim 0) and the direction (dim 1) V1 = wrf.getvar(ncdin, "uvmet10_wspd_wdir", units="m s-1",timeidx=wrf.ALL_TIMES,meta=False)[1,...] But, I would like to ask about the way that direction is provided by the package. 0 degrees is wind...

Dear WRF Community, I am trying to run a case by turning off Surface Sensible Heating (HFX) from the simulation. I use the Revised MM5 for the surface layer physics (option 1 in namelist.input). I got some ideas from this previous thread. I modify module_sf_sfclay.F file I changed the line...

Hi! I was making an LES simulation over ocean and seaice grids. While analyzing the outputs, I found that the sea surface roughness length (ZNT) is in correlation with the wind speed (checked for various heights up to 50m from the surface). Although the correlation is not precisely 1, I was...

Hello, I need helping running the WRF-Solar model. When I execute the WRF-Solar model without the shcu_physics, it compiles successfully. However, upon adding the shcu_physics, I encounter the following message: 'Tile Strategy is not specified. Assuming 1D-Y WRF TILE 1 IS 1 IE 100...