wrf physics

Hi! I have run a real case with BEP/BEM model (sf_urban_physics=3). however, I cannot find the urban state variable like CM_AC_URB3D in the wrfout files. Only 2-4 variables including EP_PV_URB3D and DRAINGR_URB3D are included. What should I do to include those variables in the wrfout? Thanks...

Hi, dear administer. My WRF version is 4.4.1. My outermost domain is east China and running time is three months. Amounts of processors for running is 48 (I think it may be enough). At first, I follow the rule to set time_step=54 (6 x dx ,my dx is 9000). However, CFL error happened after 1 hour...

I've used mp_physics=28 in previous versions of WRF with no problem, but now I'm getting errors from real with V4.4. Namelist.input contains: wif_input_opt = 1, num_wif_levels = 30, mp_physics = 28, 28, 28, use_aero_icbc...

Hi everyone, In my recent task, 2 sets of WRF experiments are designed. One is set with sf_urban_physics=1 and sf_surface_physics=2 to run with UCM coupling with Noah, and the other one having all urban land replaced with cropland with sf_urban_physics=0 (UCM closed), aiming at comparing 2 sets...

Hello! We are doing some work with the WRF urban canopy models and are currently post-processing the simulation files for analysis. Our simulations make use of the default modis_landuse_30s_with_lakes land cover as well as an updated and reclassified land cover for 2018 that includes the low...

Dear Sir, At the time of using the Isfflx option Zero (0) or Two (2), Is it a thumb rule to put the PBL option as Zero? If we use other PBL options (instead of zero), Is it any problem? Thanks and Regards, Srinivas

Dear members, Sorry, I'm very new to WRF-LES modeling. According to my observation data, I'm using WRFV4.3 to simulate the cumulus cloud that occurred over Naqu site on a specific day. I'm applying WRF-LES in real case simulation. I am supposed to use the stochastic cell perturbation method...

Hello, the YSU PBL scheme has the diffusivity coefficient Km scaling with (1 - z/h_pbl) where h_pbl is the diagnosed boundary layer height. What happens when z > h_pbl, say for shallow boundary layers? How is turbulent mixing modeled above the boundary layer? Thanks!

Hi, Im trying to determine whether WRF output variable "T2" is computed using the radiation schemes or heat fluxes/PBL schemes? If it is computed using the PBL schemes then would it be correct to say that it incorporates the effects of greenhouse gases emissivities since radiation is driving the...

Hi all, I am running WRF ARW 4.4.1 model in 3km resolution with wind farm parameterization option. I am running two runs with same configuration but one with turbines and one without in order to compare the results. When looking at difference in the wind speed, turbines causes strange noise in...

Dear WRF users I am using WRF version 4.0 and I am trying different PBL schemes. All of the schemes work except for QNSE scheme. The model crashes with a segmentation fault error when the radiation scheme is called. Seems like no issue with the radiation scheme, but more likely, that’s where...

Hello Everyone, After the WRF upgrade from V4.3.1 to V4.4.1, I get an unrealistic cold temperature pattern when heavy rains occur. The pattern is shown on the attached document. I have put on the cloud a complete set of files called "Saved_4.4.1-10-20-2022.tar.bz2" including namelists and the...

Dear all, I am wondering whether the AH in SLUCM includes industry and traffic. If not, what does the AH include in WRF then? Does anyone know where the code is? Also, in the URBPARM.TBL. The AH is 20/50/90 for Low-dens Res, Hi-dens Res, and Commercial. Are those numbers based on some specific...

Dear WRF community, I am using WRF4.4with NCEP-GFS data(3hrly-0.25*0.25) was taken as input with a two domain and is testing with various physics options microphysics = 6(WSM6) ; ra _lw=3(CAM) ; ra_sw=3(CAM) pbl=5(MYNN2.5) sf_phy=7(Pleium-Xie) the error came as like this (which I couldnt able...

Hello everyone, I run wrf model v 4.3 and using MYNN level 2.5 pbl scheme , i am interested in tke_pbl but it is showing zero values for every level and i tried with different cases, again it gives zero values. what is the reason for this? &physics mp_physics = 6, 6, 6, ra_lw_physics = 1...

Hello, I'm working with WRF in a domain placed in Central America with a 160x100 cell grid of 5 km x 5 km resolution, two way nested with a smaller domain of 1 km x 1 km resolution. I want to use CONUS parameterization in both domains, but have questions about cu_physics, since Tidke option...

Dear WRF community, I am using WRF4.4 and is testing with the urban options. I have two domains and intend to use urban only for the nested domain. My made three tests: For test1: sf_urban_physics = 0, 0, For test2: sf_urban_physics = 0, 1, For...

Hello, My objective is to compare WRF-Urban optimum configuration for a tropical city. I was able to run WRF-BEP, WRF BEP/BEM and WRF-slab with fixed physics configurations. However, I encountered the error stated below in my WRF-SLUCM run. Pasted below is my rsl.error tail rrtm: TBOUND exceeds...

I have two problems that I can't seem to figure out (using BEP and BEP+BEM). First, I want to add building data into the wrfinput file overwriting the data taken from the land use index (I am using NLCD). However, I can't get all the variables I need to overwrite to output in that file or the...

I am trying to put SST and ocean current data into WPS for the Gulf of Mexico, and then let the WRF model run to equilibrium. So, I don't want the systems to evolve. 1. How would I set this up in terms of time steps and boundary conditions? So they don't evolve? 2. Any physics recommendations...