wrf physics

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 Is the users guide's table just out of date or does it have an error?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

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...

Hello, I have couple of questions regarding the mp_physics = 28 option. I want to observe the differences in temperature when i run the model with "use_aero_icbc=.true." and "=.false.". 1) I didn't understand when "use_aero_icbc=.true." option is used, where the real-time/time-varying aerosol...

I find the WSM5 microphysics scheme in the Weather Research and Forecasting (WRF) model has two versions: the normal version 'module_mp_wsm5.F' and the accelerated version 'module_mp_wsm5_accel.F'. Is there an explanation of the differences and how to use the accelerated version?

Dear colleague, I hope this message finds you well. I am encountering an issue with the WRF model where after running the real.exe, the LU_INDEX representing lakes in the met_em file is 21, but it changes to LU_INDEX=17 in the wrfinput file. I have seen in previous discussions that this might...

I have been test a wrf example like this:ARW OnLine Tutorial. in Nested Domain (2-way, 2 Input Files): Metgrid I setted the namelist.wps as &share wrf_core = 'ARW', max_dom = 2, start_date = '2018-12-01_00:00:00','2018-12-01_00:00:00', end_date =...

I made modifications to the physical parameterization scheme and added one variable 'ALBOLD'. I added the new variable in Registry.EM_COMMON as follows: I have made changes to the original variable ‘SNOALB’ and the new variable ‘ALBOLD’ in the ‘wrfrst’ file after the spin-up time, but the...

I have carried out sensitivity experiment on sensible heat flux by modifying module_sf_sfclayrev.F file, and succeeded. But when I modify this file, LH*0.75, it doesn't change anything.

Hi WRF-forum, I am trying to understand how WRF treats its boundary condition over the ocean. I have a couple of questions listed below. Which variable does WRF use to compute heat fluxes in planetary boundary layer schemes, SST or skin temperature? Does WRF have an internal algorithm to...