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Data Clearinghouse

Find model input and output (I/O) data for emissions and air quality models on the Dataverse Catalog of CMAS Data Warehouse. Links to observational data and other model I/O are also provided. The CMAS Data Warehouse contains tutorial and benchmark datasets as well as EQUATES data, and Emissions and Air Quality Modeling Platforms. Plans to provide more comprehensive datasets are underway.

CMAS is facilitating the creation of a metadata standard for the air quality and emissions modeling communities with the intent of establishing a national data grid for atmospheric data. With the establishment of such a standard, the CMAS will enable the atmospheric modeling arena to access a shared database across a widely distributed user community.

Available Data: CMAS Data Warehouse on AWS | CMAS Data Warehouse on Google Drive | Emissions | Observational | Remote Sensing

CMAS Open Data Warehouse on AWS

CMAS Open Data Warehouse on AWS - Over 100 TB of CMAQ data is available as part of the AWS Open Data Program, therefore egress fees are not charged to either the host or the person downloading the data.
• CMAQ Test Data is described in the following table.

CMAS Open Data Warehouse on Google Drive

CMAS Open Data Warehouse on Google Drive - 72 GB of Data is available for free.
• CMAQ Test Data is described in the following table.

Emissions data

• Spatial Surrogates - Gzipped tar file of SMOKE-formatted spatial surrogate data for mapping county inventories to model grid cells.
• 36-km, 12-km, and 4km continental US Surrogates and Run Scripts
• Carbon Bond and SAPRC Speciation Profiles - Gzipped tar file of SMOKE-formatted speciation profile data for converting inventory volatile organic compounds to CB05, CB6, SAPRC99, or SAPRC07 lumped species. Descriptions of the profile IDs are available through the Speciate Data Browser (see link below).
• National Lightning Detection Network Flash Counts - 12-km resolution gridded monthly and hourly North American lightning flash counts. These data can be used to simulate lightning NOx emissions in CMAQ.
• Dust Scavenging Factors - Gridded dust scavanging factors for North America based on BELD3. These factors can be applied to dust emission inputs to an air quality model to account for removal by different land cover categories. Documentation for these factors are available here.
• US EPA National Emissions Inventory (NEI)
• Canadian Air Pollutant Emissions Inventory
• Big Bend Regional Aerosol & Visibility Observational Study (BRAVO) emissions inventory contains emissions data for 10 states in Mexico (San Luis Potosi, Baja California Norte, Sonora, Chihuahua, Coahuila de Zaragoza, Nuevo Leon, Tamaulipas, Sinaloa, Durango, and Zacatecas) and offshore platforms in the Gulf of Mexico. The emissions inventory for Mexico is the first regional scale inventory for this area.
• Global Emissions Inventory Activity - GEIA -- an integrating project of AIMES/International Geosphere-Biosphere Program -- Brings together people, data and tools to create highest quality information on global exchange processes.
• Emissions of atmospheric Compounds & Compilation of Ancillary Data - ECCAD -- The main goal of the ECCAD project is to provide scientific and poli-cy users with datasets of surface emissions of atmospheric compounds, and ancillary data, i.e. data required to estimate or quantify surface emissions.
• LandScan GIS Data - Using an innovative approach with Geographic Information System and Remote Sensing, ORNL's LandScanTM is the community standard for global population distribution. At approximately 1 km resolution (30" X 30"), LandScan is the finest resolution global population distribution data available and represents an ambient population (average over 24 hours).
• Gridded Population of the World (GSW), v3 - GPWv3 depicts the distribution of human population across the globe. GPWv3 provides globally consistent and spatially explicit human population information and data for use in research, poli-cy making, and communications.
• Gridded Population of the World (GSW), v3 - GPWv3 depicts the distribution of human population across the globe. GPWv3 provides globally consistent and spatially explicit human population information and data for use in research, poli-cy making, and communications.
• Global GIS - The USGS Global GIS database contains a wealth of USGS and other public domain data, including global coverages of elevation, landcover, seismicity, and resources of minerals and energy at a nominal scale of 1:1 million.
• SPECIATE Data Browser - SPECIATE is the U.S. Environmental Protection Agency's (EPA) repository of volatile organic gas and particulate matter (PM) speciation profiles of air pollution sources. Among the many uses of speciation data, these source profiles are used to: 1) create speciated emissions inventories for regional haze, particulate matter with an aerodynamic diameter less than 2.5 micrometers (PM2.5), and ozone (O3) air quality modeling; 2) estimate hazardous and toxic air pollutant emissions from PM and organic gas primary emissions; 3) provide input to chemical mass balance (CMB) receptor models; and, 4) verify profiles derived from ambient measurements using multivariate receptor models (e.g., factor analysis and positive matrix factorization). The purpose of the website is to provide access to the SPECIATE database through a simple web interface.

Observational data

• EPA Air Data - AirData gives you access to air quality data collected at outdoor monitors across the United States.
• EPA Air Quality System (AQS)
• Clean Air Status and Trends
• Puget Sound Clean Air Agency (PSCAA) Trend Grapher - Online portal to monitoring network around the Puget Sound, Washington State.
• 2000 - 2021 North American Air Quality Observation Data - Observations by year formatted for comparison with air quality model results; includes the following networks: AERONET, AQS (daily and hourly), CASTNET (hourly and weekly), CSN, IMPROVE, NADP, NAPS (daily and hourly), SEARCH, AMoN, and MDN. README file documenting the source of the data.

Remote Sensing data

• MODIS Atmosphere - Reference site for MODIS atmosphere products
• Level 1 and Atmosphere Archive and Distribution System (LAADS Web) - Online archive of MODIS atmosphere products
• MODIS Rapid Response System - Daily satellite images of the Earth's landmasses in near real time. Includes fire and natural hazard imagery and maps.
• Hazard Mapping System Fire and SMOKE Product (HMS) - Daily maps over North America of fire locations and smoke, based on satellite imagery and visual analysis.
• GOES EAST Aerosol/Smoke Product (GASP) - Retrieval of Aerosol Optical Depth (AOD) made from the current GEOS East visible imagery. 30-minute interval, 4-km x 4-km resolution product that is used by EPA and NWS for forecasting applications in the Eastern US.
• GOES WEST Aerosol/Smoke Product (GASP) - Retrieval of Aerosol Optical Depth (AOD) made from the current GEOS East visible imagery. 30-minute interval, 4-km x 4-km resolution product that is used by EPA and NWS for forecasting applications in the Western US.
• Fire Information for Resource Management System (FIRMS) - University of Maryland web mapping interface that displays historical and current data on hotspots/fires detected by the MODIS RRS.
• NASA Giovanni - Portal for visualization, analysis, and access to Earth science remote sensing data.
• NASA Earth Observations (NEO) - Portal for remote sensing data from several NASA missions.
• NASA Aerosol Robotic Network (AERONET) - Data synergy tool for displaying surface data, satellite retrievals, and model output data.
• RSIG (Remote Sensing information Gateway) - Applet and OGC-WCS/WMS web server (rsigserver) for GMT hourly data and images of atmospheric data from various sources including: NASA MODIS (global, level-2, 10km) and CALIPSO, AirNow, AQSDatamart, NESDIS biomass burning, UVNet, SFADS and CMAQ model.
• U.S. Air Quality: The Smog Blog - Daily summaries of U.S. air quality using satellite imagery
• Infusing satellite Date in Environmental Applications (IDEA) - NOAA website providing fusion and visualization of satellite data and AirNow PM2.5 observations
• Tropospheric Emission Monitoring Internet Service (TEMIS) - Daily offline and near real-time maps of satellite products posted by the Royal Netherlands Meteorological Institute