wrf physics

Dear all, I'm running several exps with WRF (v. 4.4.1) + WRF-HYDRO (v. 5.2) and I'm facing some issues related to the evaluation of the 2 meter temperature in a specific region of Europe (Balkan area in details). My simulations show a difference of more than 10˚ over this region with respect...

Hi, I was wondering about the wavelength at which radiation data for SWDNB and SWDOWN variables are provided. Is it provided at a particular wavelength or is it the total radiation over a range of wavelengths? Similarly for the longwave variables. Kindly refer me to the sources of it, if...

Hi, I have run WRF with the SLUCM and I am just interested in understanding the variable urban canopy Temperature (TC_URB)? and whether the 2m temperature is calculated the same way as without the urban canopy model?

hi, is there some special tricks done in the top layers of wrf to avoid energy leakage? and if yes does this affect the top two layers or the top 5 or ?? and how does this affect the physics there?

Hi all, I have some trouble when running WRF 4.3.3 with Mibrandt & Yau 2-moment (mp=9). It crashing but doesn't make an error report in rsl file and doesn't kill task. When using the same namelist for other mp scheme (Thompson 08, Morrison 10), WRF can complete full cycle run, with some extreme...

Hi all, I am running WRF model (version 4.2.2) using aerosol-aware thompson scheme (mp_physics=28) with use_aero_icbc = .false. In fact, I want to use this microphysics scheme in the context of a very low aerosol number concentration. Thus, I modify the naCCN0, naCCN1, naIN0 and naIN1 in...

Add up the layers directly?

Hi, experts!!! I want to run WRF V4.0 to assess the surface parameterization schemes including the unified Noah, CLM4, Pleim-Xiu, and SSiB, which driven by era5 datasets. The fomer 3 of them, the unified Noah, CLM4, Pleim-Xiu, are running well. However, the last one, SSiB, always take error...

Hi, I experienced a segmentation fault in my LES simulation using the NBA option with sfs_opt = 1 or 2. When I turn off the option (sfs_opt = 0), the code runs to the end. Is there any known issue about NBA model ? I didn't investigate so deeply the error since I may run without NBA model but...

Hi all, Can anyone please help me to get cloud effective radius in wrfout for Morrisson 2 moment scheme ( mp_physics=10) Thanks in advance Anas

Hi all, I am attempting a simulation with WRFV4.4 with the Shinhong PBL Scheme (11), however, I keep getting some errors relating to the surface physics. The current setup is tried with both Noah and NoahMP land surface models, but the model keeps crashing after a few hours into the...

Hi! I'm planning a sensitivity test. I've already made a control simulation, now I need to make a simulation with modified roughness length. I understand that usually the roughness length for seaice is set a constant, and it is straight forward to modify it into a new constant value. However, in...

Hi all, I recently computed a four domain (25km, 5km, 1km, 200m) simulation and received realistic output. However, after looking through the guidelines I came across the following: "PBL schemes can be used for most grid sizes when surface fluxes are present; however, at grid size dx << 1 km...

I want to run the model using the shallow cumulus scheme = 5. From the user manual, it says this one will work with MYNN and MYJ PBL. So I tried both schemes, but I kept getting errors Here I show what I get when I use the MYJ. It confuses me because the icloud_bl is supposed to be for the MYNN...

I tried to run SL-UCM model by putting sf_urban physics value as 0,0,0,1 in a 4 domain model. The model ran successfully, but whe I ran the same model with urban physics as 0,0,0,0; and removing the use_wudapt lcz from the model, the result came out to be same as previous. Kindly, tell the...

Hi, I wanted to ask anyone who has experience using the Milbrandt & Yau Multimoment Scheme. I'm looking at rain. I'm wondering what are realistic values for lambda and N_0 and what order of magnitude should I expect? I have input values of: N_T=200000kg-1 q=0.001kgkg-1 I'm trying to do a...

Hello all, I am currently using the aerosol-aware thompson scheme to do some simulation work. But I have some doubts. I want to compare the effect of aerosols on meteorological elements (such as precipitation and temperature, etc.), so I need to carry out two experiments, one with aerosols...

Hello, I'm running WRF 4.4.1 and want to activate sf_urban_physics options. I have read about CGLC-MODIS-LCZ dataset with 100m resolution and 60 land use categories. I have successfully run WPS and real.exe, but when running wrf.exe I find the following error: I activated wudapt option in the...

Hello, I was running the the ./real.exe after the metgrid program and was surprised to see the unrealistic range of values in the temperature, Can any one please help me with this, my output files and input are by the name , " files_kgeo.tar " in the upload. i have tried many things to fix...

Dear Sir or Madam, I looked in the code of subroutine moist_physics_finish_em in module_big_step_utilities_em.F file. According to the code, moist theta is updated by summation of the following terms: pre-microphysics moist theta, theta tendency times (1+1.61*post-microphysics Qv) and 1.61...