wrf physics

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...

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 -...

Hi everyone, I modified the wrfrst file to replace half of the ocean with land. While the parent grid results are normal, I’m seeing discontinuities in specific humidity and temperature in the boundary layer when the nested grid (child grid) moves over the land area. Attached are the specific...