wrf physics

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...

I am currently studying the heat island of Bangkok, Thailand as part of a Southeast Asian urban climate research. This study uses WRF versions 4.2.2 and 4.3.3. Also, Noah LSM and Single layer UCM are used. I have run simulations on many cases, but the simulations do not reproduce the daytime...

I want to make some changes to the MP P3 scheme based on some literature review I see in the phys folder there are four files for this scheme: module_mp_p3.F module_mp_p3.f90 module_mp_p3.mod module_mp_p3.o I started modifying the module_mp_p3.F file and left the others untouched. After...

Looking to see if there are WRF namelist options that need to be enabled to have certain exports in the wrfout file. I am looking for these times of values: 1.) are there any icing or turbulence options at different altitudes from that model? 2.) are there any surface visibility forecast...

Hi everyone, I am trying to increase water friendly aerosol number concentration over the Great Barrier Reef to test the sensitivity of clouds to aerosol loading. The Thompson Aerosol Aware microphysical scheme is applied, and auxiliary aerosol climatology is used...

Hello everyone, As a sensitivity experiment, I would like to investigate the effects of long-wave radiation (specifically, cloud top radiative cooling and cloud base radiative heating) on the development of a mesocyclone. The first option that comes to mind is to simply turn off the long-wave...

Hi, I am trying to run an idealized WRF simulation with mp_phys option 28 (Thompson 'aerosol-aware' scheme). So far I have been successful at specifying a vertical profile (but horizontally homogeneous value) of CCN and IN in the model. Is it possible to vary the aerosol concentration in the...

Hello, I'm nesting a 1km reolution domain inside a 5km domain. Both 100 grid squares. Input data is GFS forcast. I'm running the simulation primarily to forcast weather for sailors so the main parameters I'm intersted are surface winds, rain, CAPE and a few upper level winds. Clouds possibly but...

Hello: I am conducting a WRF simulation using ERA5 reanalysis input data. I successfully ran all programs in WPS and generated met_em files that look as I'd expect. However, when I run real.exe, the wrfinput files that get produced have changes in the LANDMASK and LU_INDEX. Specifically, a...

I am running a case that and always seems to stop at the same time. Things I have tried: 1. Increased number of cores (8 to 16 using mpirun -np 16 ./wrf.exe) 2. Increased ptop (5000 to 3000) 3. Increased e_vert (45 to 50) 4. Decreased time_step (90 to 60) 5, Checked rsl files: I have...

Hi all - I'm attempting to set up a solar forecast instance using WRF 4.5.1 and the Deng shallow cumulus parameterization (shcu_physics=5), and I've been getting all kinds of errors. The latest is the "not allocated" error in the title of this posting. Since I'm not using the actual WRF-Solar...

I am having trouble using the single-layer UCM with WRF 4.5.1. WRF dies after about 1.5 hours with little diagnostic info. I’m running GEOGRID with geog_data_res = 'cglc_modis_lcz+modis_lai+modis_30s_lake+30s', … I’m using NoahMP and sf_urban_physics = 1, 1, 1 use_wudapt_lcz = 1 num_land_cat...

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...