wrf physics

Hello everyone, We are trying to run a couple of simulations using WRF v 4.6.0 to evaluate the impact of green roof. We are using default (MODIS) as static land data and CFSv2 as dynamic weather data. We were able to run the model perfectly (in parallel mode) for the base case and validate the...

I am using sf_urban_physics=3 and i dont get values for TR_URB. Attached are the imagaes for all 3 domains

Hello, I am looking for the following equation in the wrf model: According to this paper, Robinson and Businger 2019, this is how the lowest-level vertical motion in WRF is calculated. Can anyone point me to the fortran module that computes this? Thank you in advance! I'll appreciate any help!

Hello everyone, I am carrying out an experiment with WRF to study the role of a mountain in South America on the precipitation of the surrounding region.. For this, I have run a control simulation with the mountain in the topography, and an experiment simulation where I have modified the...

Hi, I am using WRF 5.3 with CGLC data set. With MUCM (sf_urban_physics=3). For TC_Urban my values are not changing and it shows me almost plain grid values (graph attached). While LH_URB captures data fine.

Hi, I want to add some new variables related to the orography to WRF pbl scheme for caculation, the dimensions are same as the Model terrain height. But I don't know how to operate. At which step should I add them ? Should I add them in WPS geo_em.d0*.nc ? Looking forward to answers! Best...

For a previous version of Noah-MP LSM there was a specific model configuration to run the model as a single cell model (forcing for one point location and output for only this point location) here is the link to this model...

Hi, I am trying to reproduce the total LH calculation from SFCLAY using the WRF model output. I modified the EM_COMMON registry to have the coefficient FLQC and QSFC in the model output and now I am having trouble understanding the meaning of the variable QX. If I understand it (my FORTRAN...

Hi, WRF Community: I'm running the sensitivity experiments on surface roughness. The method I found in WRF Forums is to change the values (Z0MIN and Z0MAX) in VEGPARM.TBL, however, the surface roughness would be modified across the entire model domain if we take this way. So my questions are, is...

Hi all, I am using the "sf_sfclay_physics = 1" option in WRF. I am aware of the relevant reference for the surface latent heat flux formula when this option is enabled, but I am not sure whether the latent heat of vaporization used in this formula is constant, or if there is a formula for 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...

Hello everybody If urban landuse does exist in the model domain(1 in USGS and 13 in MODIS),how wrf recognize 1-Low density residential, 2-High density residential, and 3- Commercial in the area? is it defined in land use?I would be grateful if anybody can help.

Could you guide me on explicitly prescribing the diurnal variation of sensible heat, latent heat, and friction velocity profiles for simulating a PBL evolution using the WRF-LES model? I have observational data available and don't want to use the inbuilt heat flux calculation schemes.

Hello, I'm running a model with WRF version 4.5.2, but it can't proceed any further due to an error. What is unusual is that if I set the domain to nesting d02, it runs normally, but if I set it to d01, the model does not run. Also, even when set to one domain, it performs well if I change...

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...

Hello beautiful community, I have tried using WRF to run pseudo-idealized simulations. Basically, what I did was: Fetch some boundary and initial conditions (e.g., ERA5) Replace them with fields uniform in (x, y) space, effectively replacing the input data with a height-dependent sounding...

Hello everyone, I am new to the WRF irrigation module, and I have some confusion about the irrigation settings in the Noah LSM. In the WRF user guide's section on Surface Irrigation Parameterization, it is mentioned that "irr_ph" regulates the spatial activation of irrigation (with irr_freq...

i ve download from Copernicus Marine Service, Ocean mixed layer thickness and i want to add threm to WRF in namelist.input i've added the extra options sf_ocean_physics = 1, sftcflx = 1, oml_hml0 = 25 But hese values are fixed. How...

Dear all， I want to modify surface sensible heat flux in a specific small region in my simulation domain. I used the NOAH LSM, and I found that the i, j in the module_sf_noahdrv.F are in the tiles. How can I know the location of the grid so that I could only modify the HFX in the region I'm...

Hi all, I'm interested in some physical processes in thunderstorm modeling by WRF, include temperature term. Due to this artical ( How to output temperature tendency terms ), temperature tendency include 5 term: h_diabatic, RTHSHTEN, RTHCUTEN, RTHRATEN, RTHBLTEN. Did it included all processes...