Questions tagged [wrf]

The Weather Research & Forecasting Model

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Dig in the rationality of model evaluation of WRF with land-based station data

I use WRF (Weather research and forecasting) model for in regional scale meteorology simulation. And then, the WRF output files will be deemed as criterial input data applying for chemical transport ...
Han Zhengzu's user avatar
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5 votes
0 answers
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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 ...
Diana Arteaga's user avatar
5 votes
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337 views

How to transform the inventory data from degrees to kilometers

First all, my question was different from the question Converting grid resolution from degrees to kilometers. In chemical transport modeling, the pollutant source inventory was an essential input ...
Han Zhengzu's user avatar
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4 votes
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249 views

How to output slope parameter and shape parameter in WRF?

I'd like to ask if it's possible to output slope parameter and shape parameter of cloud hydrometeors in WRF? I'm calculating cloud effective radius and I'm using the formula found in Morrison scheme ...
cwmwl's user avatar
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4 votes
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How to convert eta level to pressure level in WRF model

I am working WRF outputl file and require to extract wind and temp values at 850 hPa, 700 hPa and 500 hPa pressure levels. As the WRF vertical coordinates are based on eta level, I am having trouble ...
sundar_ima's user avatar
4 votes
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146 views

Downscaling global meteorology data

Can some one explain me the basics of downscaling (interpolate to a smaller cell) a global meteorology data to a local scale (2 km × 2 km). IF would be very thankful if you provide a link at least. is ...
Anand Kakarla's user avatar
3 votes
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232 views

Calculating layer thickness in python

I have calculated the $∂θ_\varepsilon/∂z$ with 'Height', 'Latitude', 'Longitude' dimensions. ...
Kas's user avatar
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3 votes
0 answers
241 views

What is the general procedure to run WRF-chem with chen_opt=16

Is there anybody who has run WRF-chem with chem_opt=16 successfully to simulate the green house gases? According to the User guide, it can be done in this way. But ...
Allen Zhang's user avatar
2 votes
0 answers
19 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)[...
Dimitris Tsiaousidis's user avatar
2 votes
0 answers
74 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 ...
Anie's user avatar
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1 vote
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56 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 ...
Ankan Sarkar's user avatar
1 vote
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67 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 ...
Ankan's user avatar
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1 vote
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145 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, ...
sara's user avatar
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1 vote
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343 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 ...
sara's user avatar
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1 vote
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93 views

How to control output precision when running WRF?

I am very new in this area and wondering if anyone can answer my following questions: I am running WRF (4.0.3, ideal) to study rounding and truncation. I use the NCL (6.5.0) print command to access ...
Sara A's user avatar
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1 vote
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110 views

WRF: minimal list of variables required by coupling a land surface model to the whole system

We are trying to couple our land surface model into WRF. As a first step, we'd like to know what is the minimal list of variables required by such coupling?
sunt05's user avatar
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1 vote
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1k views

WRF I/O: Can any variable be output into the wrfout file-stream?

This question is related to the WRF (Weather Research and Forecasting) Model I read somewhere that a variable one wants to output, needs to be defined as state variable in the Registry like this (...
Lukas's user avatar
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1 vote
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639 views

SIGINT error WRF

I am trying to run WRF 3.8.1 using ncep2 but after a while the run stops and I get following error: ...
saurabh's user avatar
  • 141