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Community Multiscale Air Quality Modeling System (CMAQ)

CMAQ Inputs and Test Case Data

Benchmark Test Case Downloads

Input and benchmark comparison data to test the build of both the base and the coupled models are  available from the CMAS Center Data Warehouse Google Drive.  The coupled model data are also posted on EPA's anonymous FTP server.  The base model benchmark data set is a 14 day CMAQ simulation (July 1 -14, 2016) over the Southeast U.S. (80 row x 100 col) using a 12km grid size.  An annual set of model inputs for 2016 for the continental U.S. (CONUS) are also available to download.

The following links exit the site Exit

File type File name (DOI or Download Link) File Size
CMAQv5.3 Base Model Southeast Benchmark (including reference output for CMAQ-ISAM)
Two day input data CMAQv5.3_Benchmark_2Day_Input.tar.gz (10.15139/S3/IQVABD) 5Gb
Two day output data CMAQv5.3_Benchmark_2Day_Output.tar.gz (10.15139/S3/PDE4SS) 563Mb
Two week input data CMAQv5.3_Benchmark_2Week_Input.tar.gz (10.15139/S3/IQVABD) 30Gb
Two week output data CMAQv5.3_Benchmark_2Week_Output.tar.gz (10.15139/S3/PDE4SS) 4Gb
CMAQv5.3 Base Model CONUS Input Data
2016 input data Input data is organized into 5 folders: surface, misc, met, icbc, emis (10.15139/S3/MHNUNE)  
CMAQv5.2 DDM-3D
Single day input data CMAQv5.2_Benchmark_SingleDay_Input_09_12_2017.tar.gz (Google Drive Link) 1.9Gb
Single day output data CMAQv5.2_DDM-3D_Benchmark_SingleDay_Output_09_12_2017.tar.gz (Google Drive Link) 7.6Gb
Multi-day input data CMAQv5.2_Benchmark_MultiDay_Input_09_05_2017.tar.gz    (Google Drive Link) 16Gb
Multi-day output data CMAQv5.2_DDM-3D_Benchmark_MultiDay_Output_09_12_2017.tar.gz (Google Drive Link) 108GB
Coupled WRF4.1.1-CMAQ5.3
Single day input data twoway_w411-c53_hemi_sample_input_data.tar.gz (Google Drive Link; Anonymous FTP Link) 4Gb
Single day output data nf_case.tar.gz   - simulation with no aerosol feedback  (Google Drive LinkAnonymous FTP Link) 650MB
Single day output data  sf_case.tar.gz  - simulation with aerosol feedback (Google Drive LinkAnonymous FTP Link) 650MB

Additional Input Data

Use the following links to download additional input data depending on the needs of your CMAQ simulation.

The National Emissions Inventory (NEI) Modeling Platforms

Fire Emissions

Fire emissions require fire location, burned areas, and detailed fuel load information.  Examples of where to find these types of datasets are proved below.  All of these information sources can be used to estimate fire emissions. An example of a tool that can be used to generate fire emissions is the US Forest Service BlueSky modeling framework.  BlueSky modularly links a variety of independent models of fire information, fuel loading, fire consumption, fire emissions, and smoke dispersion.  SmartFire Version 2 is one component of the BlueSky modeling framework used to reconcile fire information from multiple sources.  Using these tools and estimating fire emissions can be quite complex so datasets of fire emissions have been created for the community. Examples of these datasets is the Fire Inventory from the National Center for Atmospheric Research or the Global Fire Emissions Database.

Processing Spatial Data 

Information on how to create consistent geospatial data for CMAQ inputs using the Spatial Allocator (SA) utility.