wrf_physics

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...

I want to study sea-land breeze in different thermodynamic case. case 1 : sea-land temperature difference is 5 degree C. case 2 : sea-land temperature difference is 10 degree C. it isn't correctly '5' or '10' degree C, but I want to see the difference of wind, snow in different sea-land breeze...

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...

Hello, I am interested in using the spp_lsm scheme for the RUC land surface model using WRFv4.5, however when I look through module_sf_ruclsm.F I don't see where the perturbations are applied to the parameterization. It seems like the perturbations are supposed to be added in the subroutine...

Hi All, How do I compute the net radiation at the ground surface? Do I just sum the SWDOWN ("DOWNWARD SHORT WAVE FLUX AT GROUND SURFACE") and the GLW ("DOWNWARD LONG WAVE FLUX AT GROUND SURFACE"), or there is more variables and some equation to consider? Thanks in advance for your help...

I have a few questions about NOAHMP 1. Do you have to change the geogrid file link from geogrid.arw to geogrid.arw.noahmp to use noahmp? 2. Which optional or supplementary files are needed to use noahmp for geography 3. If you don't call the noahmp geogrid file and you put the noahmp commands...

I am trying to calculate wind gusts using an equation from a research paper. In the paper you need to calculate wind speed at the pblh. However, When I print out the pblh values they are all 0 (wrf-python) workhorse@workhorse-MS-7D91:/media/workhorse/1774-7AEE/Python Charts/python charts...

Hi, running on a debug compiled WRF v4.5.1, I step into a floating point exception right at the beginning of the simulation with the Grell-Freitas cumulus scheme: (...) WRF NUMBER OF TILES = 1 [irene2054:3782323:0:3782323] Caught signal 8 (Floating point exception: floating-point invalid...