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    WRF CHEM 4.4.2 -- Simulation stops when using Single Layer Urban Canopy Model (forrtl: severe: SIGSEGV, segmentation fault occurred)

    Dear community, I have been trying to run WRF CHEM simulation using the single layer UCM (sf_urban_physics = 1), like the title says. However, no matter what I try the simulation stops after some period of time. I have conducted successful simulations using no urban (sf_urban_physics = 0) or...
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    How to add heating rate as a variable in the WRF output file

    Hello all, I want to add atmospheric heating rate as a variable in the WRF output files (i.e., 'wrfout_d0*' files). I have gone through a previous forum conversation (Output the atmospheric heating rate) and after considering the suggestions available in that conversation, I made a iofields file...
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    Add new reactions in the gas phase in WRF-Chem (for example in WRF/chem/KPP/mechanisms/saprc99/)

    Dear all, I have problems in how to add new reactions in the gas phase in WRF-Chem? I want to add new reactions in saprc99.eqn. What revisions should I make? Are some revisions made automatically by the KPP methods in WRF-Chem? Could someone with relevant experiences help me with this problem...
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    compilation error in building WRF-chem within COAWST

    Dear all, I'm using COAWST v3.7 (WRF v4.1) and want to compile WRF-chem and KPP, howerver I have problems in buiding executables. I've successfully ran WRF without chem. Here is the log file, Additionally, here are part of my enviroment settings in bashrc file: ### flex export...
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    WRF-Chem 3.7.1 vs 4.4

    I am new to running WRF-Chem. I want to know how different WRF-Chem v3.7.1 and v 4.4 are. Are there any references about it?
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    What is "t_phy" from?

    Merry Christmas to all. I know the "t_phy" in chem code is the air temperature in the middle of each layer. But I don't know which variable in wrfout file represent it. Is it "T"? Thanks in advance.
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    Failed run WRF-Chem with LCZ and urban canopy scheme.

    Hi all, I tried to run WRF-Chem with LCZ and urban canopy scheme, but it failed. The attachments are namelist.input, namelist.wps, and rsl.error.* files. Please note that: 1. I tried to run WRF-Chem with default land use and it was successful. 2. I tried to run WRF-Chem with LCZ land use...
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    WRF-Chem produce extremely low NH3 gas when using chem_opt=132 (cb05_sorg_vbs_aq_kpp)

    Hello, I am using WRF-Chem v3.7.1 to look at the gas concentrations during Mar 2022. The model with chem_opt=132 produced very low NH3 gas concentration whic is obviously wrong. However, the resutls from some other options (e.g. chem_opt=131) makes more sense in terms of the magnitude and...
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    Errors related to points exceeded cfl=2 and gasodesolver_lsodes failure in running WRF-Chem using CBMZ-MOSAIC chemical mechanisms

    Dear all, I am performing WRF-Chem v3.9.1 simulations using the CBMZ-MOSAIC chemistry option (chem_opt=32). My parent domain simulation was completed successfully. But, after using ndown to generate boundary conditions for the nested domain files, I gave a run for the nested domain, and the...
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    Errors when compiling WRF-Chem using the source code WRFV3.6.1 and WRFV3-Chem3.5.1

    I met a problem when compiling WRF-Chem on Cheyenne. There are some errors when compiling WRFV3.6.1 with Chem3.5.1. The log file is attached named compile.log.zjm. The other one is configure.wrf. BTW, I have succeeded to compile WRFV4.2 with chemistry before, so I guess it seems like a problem...
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    If WRF-Chem is capable of modeling halogen chemistry?

    Hello,everyone! I read an article (Importance of reactive halogens in the tropical marine atmosphere: a regional modelling study using WRF-Chem) which used WRF-Chem to model the halogens and said MOZART-4 mechanism has been extended to include bromine, chlorine and iodine chemistry. Then I...
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    WRF-Chem stop when aerosol radiation feedback is open (aer_ra_feedback=1)

    Dear all, I have been stacked on this problem for half a year, I am gateful that if someone could help me solve this problem. My situation is that the WRF-Chem V3.9.1.1 is always stopped after photolysis driver (rsl.error.000?) and it also happens in latest version (WRF-Chem V4.5.1). The stop...
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    Does wrf-chem provide input and output data for benchmark test cases?

    Hello everyone! I just finished compiling wrf-chem and I'd like to know if it provides downloadable input and output examples? Just like wrf-cmaq in this URL: Let me test if it works successfully. In fact, I pay attention to the output of...
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    Understanding SOA

    Hello, I am currently engaged in a comprehensive inquiry into the methodology employed by WRF-Chem for SOA (Secondary Organic Aerosol) calculations. In my current configuration, I have MOSIAC integrated with MOZART, utilizing the chem_opt parameter set to 201, corresponding to...
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    Query regarding the calculation of Aerosol-Cloud Interaction using WRF-Chem

    Dear all, I have a small query regarding the computation of the perturbation in atmospheric variables due to aerosol-cloud interaction (ACI) using the WRF-Chem model. In the case of aerosol-radiation interaction (ARI), the perturbation in atmospheric parameters can be computed by taking the...
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    WRF does not generate wrfout files after running for a period of time

    Dear all, I am running WRF-Chem-3.8.1 with chem_opt=9. I have been running WRF since 0:00 on July 15, 2016. Everything was fine at first, but by 17:00 on July 17, there were no wrfout files generated and everything seemed to be stuck. But I looked at the log file and there was nothing...
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    wrf-chem tutorial exercise 1:after running real.exe,when l used nvciew viewing wrfinput_d01,the value of dust_1 is all 0.

    i wonder why this happens ?how can i solve this problems? namelist.input is below. thank you very much!
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    “WRF-chem”-Website tutorial-“exercise1”-Insufficient variable problem

    after finishing DUST1,there is “ncview wrfinput_d01”,but in my view has not sufficient variable.l really wanna know why?anbody can help me?(sorry,my engish is not good) thank you very much!
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    Are the SW Accumulated and Instantaneous Fluxes variables not printed in the WRF-Chem output file while considering Goddard SW Radiation Scheme?

    Dear all, I used the Goddard scheme for SW Radiation and the RRTMG scheme for LW Radiation while running WRF-Chem using RADM2-MADE/SORGAM chemistry options. I want to calculate the net SW radiative flux in the atmosphere using this formula:ΔFatm = ΔFTOA - ΔFsurf However, I noticed that only the...
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    Converting the cam-chem dataset to WRF-Chem's initial and boundary chemical fields

    Hi everyone, I want to convert cam-chem dataset to WRF-Chem's initial and boundary fields following saprc99 chemical mechanism, but there is no saprc99.inp in mozbc. I already knew that cam-chem dataset following mozart mechanism, here is VOC species mapping between MOZART and saprc99 mechanism...