les

Hello, I have been digging through the source code and looking for the answer to this question, but I have been unable to find what I am looking for. Maybe someone here knows where this is occurring. Okay, so I am running a WRF-LES simulation with NOAH-MP and BEP. I want to determine how...

Hi, I'm trying to run the ideal testcase test/em_les in v4.6.1. When I run the testcase in this folder (mpirun -n 1 ideal.exe), it throws an error related to WRF fire, see attached file. However, to my understanding this should not be called in this example. Explicitly added the following to...

Hi, I have completed a 4-nested simulation with resolutions of 12150-4050-1350-450m using WRF 4.0, and used ndown to make the driving file for 150m. However, when continuing the 2-nested simulation with 150m and 50m resolutions, I encountered "Segmentation fault" in module_sf_sfclay. This error...

This is a unique situation that most people will not encounter, but I thought I would bring it up regardless. If you are running WRF-LES at sub-100 m resolution, be aware that the lat/lon precision (0.001~111m) used by default in the tslist is insufficient to pinpoint the correct grid cell...

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.

This might not be a very specific question, but does anybody know if it is possible to couple WRF-LES with a land model (e.g., CLM 5) for high-resolution simulation (grid resolution a few meters or so), so that a canopy could be explicitly modeled over several vertical layers (modeling energy...

Hello I am trying to complete my 100m LES runs for a case from the SNOWIE field campaign. To save some computational costs, I have an hour and 30 minutes of simulation left to complete the wrf les run which I want to complete these restart runs with adaptive time stepping option. However, it...

Hi everyone, Recently I'm trying to adapt LES into our domain, I followed all the instructions mentioned in Prof. Dudhia's WRF physics slides but the model always crushs at the beginning of the first tile, with no information given. I also tried shorten the time step but it barely helps. I...

Dear all： when compiling the ideal model in em_ Les,I chose sf_ Surface_ Phycics=2, and then an error is reported as： -------------- FATAL CALLED --------------- FATAL CALLED FROM FILE: <stdin> LINE: 1959 Land Use Dataset '' not found in VEGPARM.TBL. So I'm confused about when compiling...

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...

Hello everyone, I would like to know how to select the Subgrid Scale type when simulating small-scale regions in WRF-LES? Is it in the namelist. input file? Looking forward to and thank you very much for your answers!

Hello, I've been trying to run some WRF-LES simulations at 50-25m resolution but seem to be having some trouble getting around some cfl violations. I am able to run a 200x300 point domain with 100m resolution no problem, but anything lower than that causes a stream of CFL violations. I have...

Hello everyone, I want to know if you have a relatively complete WRF-LeS tutorial. Or is it better to apply to LES? I found a lot of documents, but there is no specific setting. I am a novice, so I need some hand-to-hand solutions. If it can have a namelist reference, it is even better. It needs...