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wrf output

  1. W

    Problem while running WRF-Chem V4.5 with chem_opt=301

    The program got stuck without any error message. No output or log entry appears even after 20 hr. I had to kill the program forcibly. The last few lines of the rsl.error file are: “d01 2024-04-01_00:00:00 calling conv transport for chemical species d01 2024-04-01_00:00:00 calling calc_het_n2o5...
  2. W

    boundary layer height (PBLH) calculate

    Dear all, I used the MYNN boundary layer scheme, and I noticed that the boundary layer height (PBLH) variable is output in WRF. How is it calculated? Thanks, Bingyao
  3. M

    Urban canopy parameters ingestion into WPS/ WRF

    I am trying to ingest city specific urban canopy parameters that I developed using buildings heights and footprints data. The UCPs I built were: 1) Mean Building Height, 2) Distribution of building heights for 5m bins, 3) Area weighted mean building height, 4) Standard deviation of building...
  4. Y

    Wind speed at 10 m height in tslist

    I have used tslist to output a time series of wind speeds at 10 m height, and when I compare the absolute values of U10 and V10 output in wrfout with the absolute values of the tslist's wind speed in the TS file at the same time, there are many times when the latter wind speed is smaller than...
  5. A

    V wind, pixel size and map factors

    Hello, I'm currently working on Tahiti Island in French Polynesia (approximately bounded by 154°W / 13°S to 145°W / 22°S) using the Mercator projection. I'm a bit lost. I've been reading about map factors in Skamarok et al., 2008 (working with WRF V3.6) and in the corresponding version of the...
  6. A

    WRF outputs time shifting with NCO

    I'll just leave this here, in case someone ever needs it; finding the solution is far from obvious. Because I cannot (yet) access some Python packages to post-process my data, I use NCO instead. However, dealing with time in WRF NetCDF format quickly becomes complicated. Nevertheless, the...
  7. J

    Standard Deviation of Wind Speed and Vertical Velocity?

    I have been perusing the WRF Registry and have found that it appears WRF is able to output the standard deviation of the wind speed at a 10 meter height in m/s. Does anyone know if WRF is able to output the standard deviation of the wind speed or standard deviation of the vertical velocity at...
  8. S

    Regridding / Convert Lambert projection of WRF outputs to Lat-lon projection + MASKING according to Shape file

    Hi, I have run the WRF simulation using Lambert projection. For verification, I have to convert the projection to lat-lon projection and have to mask it according to my shape file for ease of comparison. For this, I have used the rcm2rgrid function in NCL. where I can convert my grid, but...
  9. E

    WRF Running Help For New User

    I am a graduate student and I need to use the WRF model for my thesis entitled "Investigation of Wave Energy Potential on the Black Sea Coast". I will not use it for professional purposes, and I need to perform a simulation in the simplest way possible. I cannot provide more details since I am...
  10. Alfred-Jose

    How to derive Specific Humidity from WRF output ?

    Hi there, I have been trying to find the variable for Specific Humidity (sph) at single level/ pressure levels from the output files. Does it come with any specific parameterization schemes.? Although I tried some combinations and have not been able to find it Thank you so much for your time...
  11. L

    WRF-Chem running error, can not read wrfchemi

    Hi, everybody I use meic2wrf to make wrfchemi, but when I run WRF-ChemV4.5.2, I found that it reports an error Error trying to read metadata, and then it's still running normally after that, but only the information of the weather variable is in the wrfout, and I would like to know what I...
  12. O

    Query about Different Spatial-Temporal Patterns in 3-Hourly and 1-Hourly WRF Outputs with Adaptive Timestep

    I am currently working with the WRF model and have encountered an intriguing observation regarding the spatial-temporal patterns in the model outputs when using adaptive time step settings. In my simulations, I have noticed significant differences in the spatial-temporal patterns between the...
  13. S

    How do I understand Registry files?

    Hello, I am running WRFv4.4.2 and studying the registry to create only the variables I need in the output. There are numerous files in the ~/WRF/Registry directory, and from what I understand, the files used are different depending on the compilation options (em_real, or ideal, etc.), and there...
  14. pegwan

    Initialising em_tropical_cyclone for the southern hemisphere

    I am attempting to run an idealised tropical cyclone simulation for the southern hemisphere, however I am running into some trouble when initialising the vortex. In order to change the starting conditions, I am modifying 'module_initialize_tropical_cyclone.F' (user settings shown below)...
  15. T

    The result of WRF_Hydro is null when there is lake.

    Dear all, Would you give me some advices for the result of my wrf_hydro run is a blank value in the lake area, and it is also in the croton_NY_training_example_v5.2 example given by the official website For example, I show the Ground Temperature for the result.
  16. george_victor

    Surface roughness estimation over ocean grid points

    Hi! I was making an LES simulation over ocean and seaice grids. While analyzing the outputs, I found that the sea surface roughness length (ZNT) is in correlation with the wind speed (checked for various heights up to 50m from the surface). Although the correlation is not precisely 1, I was...
  17. L

    WRF p_lev_diags setting error

    Hello: I am trying to use the 'pressure level output' option in WRF4.5.2 To save U, V, T at some pressure levels.But according to my namelist output, the file contains variables such as U10, V10, T2, etc., and does not include variables such as U, V, T, dew point temperature, etc. My input...
  18. Q

    Variable 'SST' in the wrfout is strange

    Dear all I use ncview to check my wrfout, and variable 'SST' is very strange, I think something wrong I didn't realize happened. Here is the image of 'SST'. The datasets I use is GHRSST Level 4 GAMSSA_28km Global Foundation Sea Surface Temperature Analysis v1.0 dataset (GDS2), and I use this...
  19. A

    SST values in continental region

    Hello WRF community, I am running simulations with and without updating the sea surface temperature. When I plot the SST variable from the wrfout with and without SST updates, it has positive values over the continental region. I think it should be NaN or 0 values. Am I doing something wrong...
  20. William.Hatheway

    NOAHMP questions

    I have a few questions about NOAHMP 1. Do you have to change the geogrid file link from geogrid.arw to geogrid.arw.noahmp to use noahmp? 2. Which optional or supplementary files are needed to use noahmp for geography 3. If you don't call the noahmp geogrid file and you put the noahmp commands...
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