wrf physics

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...

Model Code WRF 4.5.2 Noah-MP v4.5 Platform Linux x86_64 INTEL (ftn/icc): Cray XC (dmpar) Model Summary 4km SE USA Restart run starting from Oct. 1974 through Dec. 2020 Forced with ERA5 from the Copernicus CDS via python API Geogrid run with GEOGRID.TBL.ARW.noahmp Notable modules: Thompson MP...

I wanted to know U value of roof or thickness of roof when using sf_urban_physics = 3. and how we can change it

I am investigating options for obtaining values of parameterised convective updraft and downdraft mass flux values from WRF for use in the EMEP chemistry-transport model at global scales. From the registry, I was interested in the UDR_KF, DDR_KF, UER_KF and DER_KF variables for up/downdraft...

I try to run my wrf model over three months (MAM) using cfs data but i am have a problem ,which is in the wrfbdy file the dates stops in "2024-05-18_06:00:00"

Dear Support, In my idealized experiment, I added a land area with a terrain height of 2 meters and fixed soil moisture at 30%. The land surface scheme is Noah LSM, and the initial surface temperature is set to 301.65K (originally 280K in the code). However, when the model starts integration...

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 doesn't need to be correctly '5' or '10' degree C, but I want to see the difference of wind, snow in different...

Hi all; I am using wrf(v4.2) to run a case.And I have create 31-33 urban category in geo_em.d01.nc.The variable LU_INDEX and LANDUSEF also have the corresponding values.But when i run the case with the setting,it didn't work with the urban area.To sovle the problem,i use the same geo file...

I am having trouble understanding the dissipation term for turbulent kinetic energy in Boulac scheme. As per the the 1989 paper from Bougeault and Lacarrere the dissipation term is given by dissipation term = -ceps_b * te1**1.5 / dl1 . (assuming my understanding that te1 was the tke bounded by...

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...