wrf physics

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...

We are using GFS/GDAS at 0.25 degree resolution as primary input for WRF simulations in forecast mode for the next 3-4 days. While the regional simulations at 20 and 25 km resolutions are looking good, the precipitation patterns for coastal regions when downscaled to 3km are consistently...

Good day colleagues, Out of curiosity, I have been trying to print out the values of SAG (Solar radiation absorbed by ground) and SAV (Solar radiation absorbed by vegetation) in the VEGE_FLUX and BARE_FLUX subroutines within the MODULE_SF_NOAHMPLSM using WRITE (6, *) 'SAV=', SAV, 'SAG=', SAG ...

Hi, I came across segfault for WRF 4.5 using the new modis-lcz dataset under SLUCM urban physics. The segfault always happen at 1 of the 72 cores in Cheyenne. From the error log it seems that the segfault happens during avgflx at solve_em.F. I cannot pinpoint how it happens without any...

Hello, I want to analyse contributions to hail tendency (in the MY microphysical scheme) of conversion rates of cloud, rain, ice ect., but I'm not successful with WRF-wrfout. Can anyone help?

I am seeing unusual tiling in the precipitation field simulated by WRF aerosol microphysics scheme of Song and Zhang, 2011, i.e., mp_physics = 40, which is used together with cu_physics = 11. I have 3 domains in my simulations and tiling is happening in all three domains. I am using WRF V4.4...

Dear WRF community, I have extracted 3D cloud fraction (CLDFRA) from my WRF output files. However, I got weird values, like 0.00239 for some hours. can I use the obtained values or I should transform them? Thank you

Hi, everyone. Recently I have a question. That is, if I have a gridded dataset of urban building height. How can I use it when I run a WRF simulation? As I know, we re allowed to replace the land use and land cover (LULC) data. Is there a similar way to deal with urban 3D data? Now only...

Hi all, I am trying to run the aerosol-aware version with mp_physics = 28 option under WRF V4.4. Following all the instructions, the metgrid.exe ran well after adding the following line: &metgrid constants_name = 'QNWFA_QNIFA_QNBCA_SIGMA_MONTHLY.dat' The B_WIF_*、 I_WIF_* 、 W_WIF_* have been...

Hello everyone, I'm having difficulties running WRF V4.3 with ERA5 data and BEP-BEM urban parameterization. My goal is to simulate the whole 2022, and before that I'm testing running the first 10 days of January. However, at day 4 and 04h the simulation stops with the following error: d01...

Hello all, I'm running WRFV4.5 with sf_urban_physics=1 (i.e., SLUCM), unfortunately, the model stopped after integrating several hours. The error information which I got is as follows: [ib0414:86410:0:86410] Caught signal 11 (Segmentation fault: address not mapped to object at address...

Dear all, I experienced a bug in TSLB_MOSAIC, SMOIS_MOSAIC and SH2O_MOSAIC output when using the option sf_surface = 1 with Noah LSM and mosaic_cat=3. The figure "TSLB_MOSAIC_t0_mosaic0" shows a 2D color plot of TSLB_MOSAIC 45 minutes after the simulation start time, in the first mosaic layer...

Hello all, My name is Young. I'm a grad student who just started learning WRF. My goal is to analyze Urban Heat Island effect with WRF, and I recently installed WRF-ARW 4.5 in my Linux successfully i. I'm still figuring out the next step- preparing an LCZ map of my ROI and others that is...

Hello. I'm trying to run the latest version of the WRF model by implementing the hybrid 100-m global land cover coupled with the BEP urban parameterization. I have 3 nested domains with 12 km, 4km, and 1km horizontal resolution, respectively. Unfortunately, during the simulation of the first...

Hi all, I am trying to fully coupled SNICAR snow albedo shemes in WRF/Noah-MP(online). The SNICAR has been Coupled in WRF/CLM already and I am planning to ake out the SNICAR fortran subroutine from CLM model code and create a new physics option in Noah-MP. Now I have the problem that the SNICAR...

Greetings, I am using WRF 4.4.2 with ghg_input = 1 for long term regional climate simulations. I notice that when I restart the model, say, 7 years into the simulation (2106), that my GHG values in the rsl files are still for the initial date (2009). I'm assuming that this is an issue with...