Questions tagged [wrf]
The Weather Research & Forecasting Model
52 questions
2 votes
0 answers
219 views
How to calculate precipitation rate (mm/hr) from WRF model output variable?
I want to calculate the precipitation rate (mm/hr) from the WRF model output. After searching online, I learned from this conversation (Calculate precipitation from WRF model output) that I need to ...
- 21
2 votes
0 answers
93 views
Providing wind direction with wrf-python package
I understand that wrf.getvar will give both the speed (dim 0) and the direction (dim 1) V1 = wrf.getvar(ncdin, "uvmet10_wspd_wdir", units="m s-1",timeidx=wrf.ALL_TIMES,meta=False)[...
1 vote
0 answers
116 views
Error message in metpy function interpolate_to_isosurface for relative humidity variable from wrf
I want to extract relative humidity at a specific pressure level (850 hPa) using metpy. Earlier, I tried with wrf-python function 'wrf.interplevel' and it worked successfully. But, I was getting some ...
- 11
2 votes
0 answers
191 views
Calculating vertical vapor flux divergence from WRF model output using NCL
I want to find the vertical vapour flux divergence (1/g * ∂(qw)/∂z) as mentioned in section 3.3 of this paper https://acp.copernicus.org/articles/20/5559/2020/#section5 From few discussions here, I ...
- 21
1 vote
0 answers
141 views
Which way is the more computationally efficient for running WRF-Chem with one way nesting: (a) by setting feedback to '0' or (b) using ndown.exe?
I want to run WRF-Chem with one-way nesting because of the limitations of my system (a linux server with 378 GB of RAM and 32 processors). I have gone through the WRF user guide, which explained how ...
- 31
2 votes
1 answer
95 views
Can historical emissions data be used for a future WRF-Chem model run?
I am new to running the WRF-Chem model, so this question maybe a little elementary. I wanted to perform an year-long simulation of certain chemical species for 2019 and for that, is it sufficient to ...
2 votes
1 answer
629 views
Is spin-up really required to run the WRF-Chem model and if so, what determines the time period of the spin-up?
For example, I am interested in making a simulation for some chemical species for 2019. I am planning to provide NCEP/GDAS FNL meteorological data at 0.25 degree and CAM-Chem chemical boundary layer. ...
4 votes
0 answers
321 views
Calculating layer thickness in python
I have calculated the $∂θ_\varepsilon/∂z$ with 'Height', 'Latitude', 'Longitude' dimensions. ...
- 41
1 vote
1 answer
297 views
Why are all the variables ( DRY_DEP_FLUX and WET_DEP_FLUX) zero in a wrf model output in all the time steps
I am working on WRF_GHG, I would like to calculate dry and wet deposition in the dry and wet seasons for CO2 and CH4 gases. However, when I check the wrf output, I see that all the variables (...
- 311
2 votes
1 answer
609 views
How to find the top level of the planetary boundary layer in WRF?
I am working on WRF_Chem, I would like to calculate the concentration of CO2 just in the Planetary boundary layer(I mean, I want to calculate CO2 from surface to top of PBL).in WRF How can I calculate ...
- 311
2 votes
1 answer
189 views
regeride netcdf file to template netcdf file resoulution
how can I regrid my NetCDF file into another NetCDF file resolution? change the file number 1 or 2 or 3 (file1.nc,file2.nc,file3.nc ) into resolution template file (wrfinput_d01.nc) . I have attached ...
- 311
1 vote
0 answers
203 views
wrf_chemi file with 30 time steps
I creat wrfchemi file for my wrf-chem, my wrfchemi file has 30 time step, frames_per_auxinput5 = 30, 30, auxinput5_inname = "wrfchemi_d", auxinput5_interval_m = 60, 60, ...
- 311
1 vote
1 answer
187 views
Wind speed data plot contains blank gaps
I am relatively new to Python, and I am having trouble plotting some data. Specifically, I am plotting wind speed data on a 2-D plot that I grabbed from the Weather Research & Forecasting (WRF) ...
- 55
1 vote
0 answers
435 views
Providing Edgar emission using prep_chem_source for tracers (CO2-CH4)
I am working on CO2 and CH4 by WRF-CHEM, for providing my anthropogenic emission from Edgar data base, I'm going to use the Prep_chem_source App. I would like to use Edgar data emission (as my ...
- 311
5 votes
0 answers
1k views
Wind rose WRF-PYTHON
I'm trying to plot a windrose but I don't know how to get the variables ws and wd. Is there any variable in the wrf output that can be used to make a windrose? I tried with 'wspd' et 'wdir' but I ...
