Hardware For topics related to hardware recommendations, cluster configurations, processor speeds, etc. Infrastructure For topics on how CMAQ is currently organized and distributed on github, maintained on EPA compute servers and shared with the CMAS Community. Land Surface For issues/questions related to land surface modeling algorithms in CMAQ. Benchmark Issues and Errors Share your questions and experience in using CMAQ input and output benchmark datasets, including run-time results, and quality assurance of output data, and impact of libraries and compilers. Chemistry and Aerosols For deep diving into the Chemistry and Aerosol formulations of the CMAQ model. Ancillary Inputs Use this category to report issues with using ancillary inputs (other than Emissions or Meterology) to CMAQ. Meteorology For topics related to CMAQ meteorology. CMAQ-PREP Category to discuss issues related to tools in the CMAQ/PREP directory ICON BCON MCIP Documentation We welcome questions and suggestions on CMAQ documentation. Within the CMAQ GitHub repository (, this includes the CMAQ User’s Guide, Tutorials, Developer’s Guide and Release Notes found under the DOCS folder as well as sample scripts and files that are provided throughout the code base. Run Time Errors and Issues Having trouble running CMAQ? Review existing topics that have been posted under this category, and if you can’t find something similar, create a new topic and attach your log file and run configuration settings to get help. Post-processing For topics related to CMAQ post-processing tools and software (AMET, Python, R). Compiling For topics related to compiling CMAQ and the libraries that it depends on including MPI, netCDF, I/O API.
Topic Replies Activity
About the CMAQ category 2 March 11, 2019
CMAQv5.3.1 KZMIN Controls PURB Variable 1 February 21, 2020
CMAQv5.3.1: SOILINP File and INITIAL_RUN Settings 1 February 21, 2020
CMAQ-DDM saprc07tc species run error 2 February 21, 2020
Does old emission input data work with new version of CMAQ-5.3.1? 3 February 21, 2020
Issues with M3DRY "NEGATIVE or UNDEFINED Dry Deposition Velocity" 1 February 18, 2020
CMAQ-WRF online 3 February 12, 2020
Seeking docs on integrated reaction rate (IRR) set up in CMAQ process analysis 2 February 12, 2020
NetCDF error in CMAQ5.3.1 6 February 10, 2020
Global emission files for year 2019 3 February 6, 2020
Error when running ICON run script 18 February 6, 2020
CCTM Compile Error 4 February 4, 2020
Error when running ICON and BCON 2 January 31, 2020
Turning off emissions sources in CMAQ 5.3 9 January 30, 2020
BCON m3conc from CCTM outputs 10 January 30, 2020
DDM for CMAQ 5.3? 3 January 28, 2020
CCTM run at less than 1 hour timestep 8 January 27, 2020
Simulation of ozone concentration is low 2 January 23, 2020
Creating BCON from concentration 3 January 21, 2020
LUFRAC_CRO error in CMAQv5.3 7 January 10, 2020
CMAQ5.3 run. / run_cctm_2010_4calif1.csh error not seen CSQY_DATA_saprc07tic_ae7i_aq 2 January 10, 2020
Combine run Error 9 January 10, 2020
MPI_ABORT CMAQ v5.3.1 13 January 9, 2020
CCTM compilation 50 January 9, 2020
Maximum AQCHEM total iterations exceeded 8 September 3, 2019
ICON and BCON data source 4 January 6, 2020
CMAQ5.3 subroutine gridded_files_se 14 January 6, 2020
Twoway model configuration error 3 January 6, 2020
Incorrect timestepping for elevated point source emissions 2 January 6, 2020
The calculation mechanism of ASO4s 5 January 3, 2020