wrf physics

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...

I want to set the solar radiation from convective cloud tops to a fixed value (such as 800w). But I didn't know how to set parameters. whether can I set the constant value through modifying the namelist.input. thank you！

I ran a case in WRFv4.4.2, which was a 15 km run using Noah-MP land surface model. Simulation for SF_URBAN_PHYSICS = 1, Single-layer UCM in the Southeast United States. Simulation started from 2015-08-02 00Z and plan to end at 2015-08-10 00Z The run crashed at 2015-08-03_14:30:00Z due to NaN...

I am currently using WRF 4.5 to perform regional climate simulations over the Tibetan Plateau. However, I consistently encounter an error when running wrf.exe: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x151d5f527ad0 in ??? #1...

Hi all, Im trying to use the WUDAPT LCZ to upgrade the urban landuse in WRFV4.5. According to the recent update log, the lu_index from 31-41 is changed to 51-61. So I used w2w to generate the LCZ geo files and then modified the lLU_INDEX in the geo_em.d0*. The metgrid.exe and real.exe is...

Dear WRF team, I am using WRF to simulate the cooling effect of green roofs in the city, but I found that I can only set the same green roof coverage for a certain category of LCZ separately in URBPARM_LCZ.TBL. This does not meet my needs because the green roof coverage may also be different...

Hello everyone, My simulation would run successfully without the Urban turned on, but when I turn on the Urban using BEP_BEM, it wont run and I get this error: At line 2372 of file module_sf_urban.f90 Fortran runtime error: Bad real number in item 1 of list input

Dear @Ming Chen, I am sorry for disturbing you. I want to get global radiation from the wrfout files. I saw your thread that it can be obtained SWDDIR and SWDDIF A question about SWDOWN (DOWNWARD SHORT WAVE FLUX AT GROUND SURFACE). However, I don't have these variables in the wrfout file, but...

I want to study the effect of black carbon aerosol radiation feedback on O3, so I want to design an experiment to only turn off its radiation feedback. It seems that this cannot be done just by modifying namelist. What should I do?

Dear WRF Users! How can I activate hail in Fast-SBM microphysics parameterization? I can run my simulations with graupel, using the same parameterization with 33 bins input. In this case, the hail is 0 for all grid points. I read that the hail can be simulated with 43 bins, but I do not know...

Hi everyone! I'm currently working on a research to study how irrigation can influence some climate parameters in Egypt. I've already conducted a control, basic run using WRF v4.1.3. Now, I would like to introduce irrigation into the model. What my mentor is saying we could modify the Noah...

Dear WRF community, I would appreciate it if someone could explain me the differences in using the simple 3 urban classes and WUDAPT generated LCZ. I understand that WUDAPT provides more detailed information about urban area providing around 10 urban classes. However, I would like to...