wrf physics

Hi all, I am using WRF-Chem v4.4.2 under a triple nested domain (36 km, 6 km, and 1 km) in August 2019. In 6 km and 1km simulations, there is a strange T2 cold bias after several hours of reinitialization. Consequently, simulations crash. I tested different versions of WRF from v4.1.4 to v4.5...

Greetings, I am trying to use the Noah-MP irrigation routines which require information generated in geogrid. This works fine for U.S.-specific domains. However, I have a grid that extends from upstream of Hawaii and downstream through Western Africa. Hence, geogrid crashes presumably because...

Good morning, Could someone please explain how to use e_Vert and the stretching variables? Like I have read the tutorials and I am still not sure how to use it properly. I have attached my namelist.input for someone to help me.

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!

I was searching for sf_ocean_physics at the Forum and I found this thread: problems running WRF with sf_ocean_physics option 2. Is mentioned that options 1 and 2 doesn't recognize the difference between land and sea. Mr @jcarlosgm solved that masking and using a conditional. Can someone give me...

I wonder how to use 3D ocean data for WRF-3DPWP. Although the method to activate had been mentioned in the WRF user's guide, it didn't provide the details about how to input 3D ocean data (for example, satellite-observed SST and HYCOM subsurface reanalysis data) for WRF-3DPWP. The current...

In practice does e_vert need to be larger than num_metgrid_levels or can they be the same?

Hi, I was actually facing difficulty in figuring out whether the CANICE(mm) output in WRF is incremental or cumulative(total ice accumulated from start till that particular time instant)? The reason why I am asking is because I ran a simulations for an ice storms and then after observing the...

I am running 24hr forecasts initialized from GFS with NoahMP. Over areas of snow there is a very strong cold bias. I suspect this is because when the model is started it considers this snow to be new snow, even though it has been there for many months. Is that possible? Is there a way to fix or...

Good morning, I saw in a post today that Noah_MP got updated to v.50 https://opensky.ucar.edu/islandora/object/technotes:599 Will this be added to the v4.5 of WRF?

Dear All, I am curious to know that the CLM4 is coupled with the WRF-ARW a long ago. Does it include the SNICAR (SNow and Ice Aerosol Radiation). It is mentioned in the official note that CLM4 is coupled with SNICAR (https://www2.cesm.ucar.edu/models/cesm1.0/clm/Short_CLM4_SciDescription.pdf)...

Greetings, I am able to stably run WRF version 4.1.3 for a full year with: sf_ocean_physics = 1, isftcflx = 1, oml_hml0 = 50 oml_gamma = 0.14. I can complete a full year simulation. However...

Hi, dear administer. My WRF version is 4.0. My outermost domain is Shanxi， China and running time is 12 hours. I failed to run wrf.exe when submitting to compute node. The rsl file shows the following error and cannot run after modifying sf_urban. How can I solve this problem? Looking forward to...

Hello, I am attempting to run nested (9km x 3km x 1km) urban simulations with the use of the mosaic landuse categories option. The simulation is stable and the output is realistic when I initialize and integrate the model forward in time. However, whenever my compute limit is reached and I...

I want to ask you whether you need to use the idea command when you use the ndown command in the WRF-LES process? In addition, I want to seek some tutorials about WRF-LES Thank you very much!

Dear colleagues, (1). Please, how can I ensure that my simulation has a fine vertical resolution? (Vertical height above the ground). The e_vert? (2). How can I ensure that the values of snowfall and snow coverage are reset to 0 before each integration? (3). How do I exclude un-needed...

Hi All, Significant differences were found in the SWDOWN calculation between WRF-4.3.1 and WRF-4.4.1. Compared with measured radiation data, WRF-4.4.1 shows much worse scores. Similar differences are in CLDFRA: compared to satellite observation WRF-4.4.1 underestimates the values of the...

Hi all, Based on the relies on this link: WRF energy and moisture budget?, I know the energy balance calculation is: (1-ALBEDO)*SWDOWN+EMISS*(GLW-STBOLT*TSK**4)+GRDFLX-HFX-LH I am not sure how WRF calculates T2, I am curious about which component's change in the energy budget explains my T2...

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...

Hi there, How do I calculate frost information from wrf simulation?