wrf physics

Hi. I am a PhD Student doing research on methane plumes detection using satellite imagery. I want to run a methane simulation on WRF LES. Can anyone help me on this? A step by step guide or a tutorial link would be very helpful. Thank You

Hello, I have a question about the physics in wrf 4.5 , i noticed that exist an accelarted version of some physics like wsm-3 and wsm-5 but wsm-6 not, why wsm-6 haven't an accelarate version ?

Hello WRF community, I am new to WRF and this forum, but I believe (after some searching) that this particular question was not asked. I wish to simulate KH waves (scale of several kilometers) over some fairly complex terrain; I wish to run the model at 333 m resolution which necessitates 4...

Hello everyone, Sorry for my English. You'll see, I've run WRF with the default distribution of vertical layers (in my case, e_vert=35). For a better resolution in the lower layers, I set up the following distribution: eta_levels = 1.000, 0.998, 0.994, 0.990, 0.988, 0.982...

Hi, I'm using the acc_phy_tend=1 option to analyze my potential temperature results. The default outputs for accumulated theta tendency are ATHMPTEN, ATHCUTEN, ATHSHTEN, ATHBLTEN, ATHRATENLW, and ATHRATENSW. Following advice from other threads, I've modified source codes to include the tendency...

Hello, This is just a general question. I have been simulating typhoon induced precipitation over an area that includes a mountain (bottom figure). This was run at 5x5 km with IC from ERA5. Unfortunately, despite trying all combinations of the cumulus, microphysics, and PBL schemes, the best...

I run WRF-ARW with ERA5 as an output, with two nested domains over Alaska (12 and 4 km). I use sf_lake_physics = 1 and use_lakedepth = 1 with MODIS lakes and the optional lake depth data. The snow inputs are also from ERA5, but with some custom pre-processing. Suffice it to say we've put a lot...

Hi, I was wondering if anyone can point me to the file which contains the list of what mp_physics schemes are associated with what number? I've seen conflicting lists online and so I wanted to see what WRF's list is to avoid any mistakes. To confirm, what I mean is where is the file which...

Hi all, I'm employing WRF-CLM (v3.81, sf_surface_physics = 5) to examine the impacts of land use and land cover change on regional climate. The control simulation uses the default land use, and the land use frictions (LANDUSEF) and dominant index (LU_INDEX) of future ones are modified following...

I am calculating downward short wave flux using WRF. I found a variable called SWDOWN among the output variables, and I am curious whether this variable is instantaneous or averaged according to history_interval. I would like to know whether the value of SWDOWN is the instantaneous value of...

Dear WRF community, I have a question about soil moisture in the green roof option. I would highly appreciate it if someone could help me. For single layer UCM (SLUCM), how can I change the initial soil moisture of green roofs? While green roof properties for SLUCM are specified in...

Hello, I'd like to test YSU CRN = 2.5 as Vaughan and Fovell did in "https://journals.ametsoc.org/view/journals/mwre/149/3/MWR-D-20-0264.1.xml". I've found "363 brcr_ub = 0.0,brcr_sb = 0.25,cori = 1.e-4" in "wrf/phys/module_bl_ysu.F at master · yyr/wrf". is it the correct to change brcr_ub to 2.5?

Greetings, everyone. I want to calculate net surface heat flux from WRF output. Is it alright if I calculate the net surface heat flux by using the formula, net HF = SWDOWN + GLW + LH + HFX_FORCE. The details of the variables can be found in the variable list which I have added here for...

Dear all, I am new to urban climate simulations and I have recently run two simulations using ERA5 data and WRF version 4.5.0. One of the simulations is done using the bulk scheme and the other with SLUCM. The thing is that over urban areas I get average seasonal values of w10=sqrt(u10^2+v10^2)...

Running ERA5 Data from ECMWF Model stops with this error: I tried changing dt to 3*dx and the error went away but the model stopped. I have attached the namelists, rsl files. Any help would be appriciated.

Hello, I understand that setting icloud=0 turns off the cloud effect on optical depth for shortwave radiation and longwave radiation (options 1,4); however, I am not seeing any way to turn off the cloud effect for just solar or just IR. Any help is greatly appreciated!

I used BEP+BEM (urban setting=3) to simulate the urban environment, and want to answer the question: AC scenarios effect on urban heat environment. However, I met a problem. There is a parameter of AC settings to adjust the AC using time. I want to simulate AC opening from 18:00 to 8:00 of next...

Hello When I call the pavement module (RUC, Pleim-Xiu) with WRF4.5, there are some problems, can you help me with guidance. The following are the errors and namelist.input...

I try to start a WRF-LES simulation. 3 domains starting from 3/1km/333/ and the two last one 111/33. it works very slowly when I just start 4 domains but does not go further (but does not crash) when I add the last domain. I have no idea what is the reason. I tested a few combinations but it...

I am currently in the process of upgrading from WRF 3.8 to WRF 4.5.1. The transition has been fairly painless, up to this point. I have tried several configurations and everything has worked fine on the first try. However, when I run the configuration below (Goddard SW/LW and Morrison...