This page links to supplemental downloadable data files related to RSIG.

This page is intended for users experienced with air quality modeling using the EPA's Fused Air Quality Surfaces Using Downscaling Tool and the Community Multiscale Air Quality (CMAQ) model.

• Fused Air Quality Surface Using Downscaling (FAQSD) Files
  • Input files
  • Output files
• CMAQ Input Files

Fused Air Quality Surface Using Downscaling (FAQSD) Files

A Bayesian space-time downscaler model is based on statistical modeling research in the development of fused space-time predictive surfaces for air quality.

A Bayesian space-time downscaler model is used to "fuse" daily ozone (8-hr max) and fine particulate air (24-hr average) monitoring data from the National Air Monitoring Stations/State and Local Air Monitoring Stations (NAMS/SLAMS) with 12 km gridded output from the Models-3/Community Multiscale Air Quality (CMAQ) model.

Daily predictions are available at the 2010 US Census Tract centroid locations for 2002-2013. The 2002-2008 downscaling outputs were run on 2002-2008 inputs using 2010 Census Tracts to be comparable across the years with the 2009-2013 downscaler output.  

For more information, refer to the FAQSD technical documentation. 

Disclaimer: The PDFs on this page are not completely formatted for screen readers or other assistive technology. For help with a document, contact Adam Reff, Air Quality Analysis Group, US EPA/OAR/OAQPS/AQAD. 

• Downscaling Input files:
  • 2002: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2002 - Annual Report (PDF, 168 pp, 15 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2002_12km.zip (ZIP, 288 MB)
    • CMAQ Ozone, 36-km resolution grid, CMAQ_DS_O3_2002_36km.zip (ZIP, 72 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2002_12km.zip (ZIP, 301 MB)
    • CMAQ PM2.5, 36-km resolution grid, CMAQ_DS_PM25_2002_36km.zip (ZIP, 75 MB)
    • AQS Ozone, ds.input.aqs.o3.2002.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2002.csv (CSV, 6 MB)
  • 2003: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2003 - Annual Report (PDF, 168 pp, 15 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2003_12km.zip (ZIP, 288 MB)
    • CMAQ Ozone, 36-km resolution grid, CMAQ_DS_O3_2003_36km.zip (ZIP, 72 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2003_12km.zip (ZIP, 302 MB)
    • CMAQ PM2.5, 36-km resolution grid, CMAQ_DS_PM25_2003_36km.zip  (ZIP, 75 MB)
    • AQS Ozone, ds.input.aqs.o3.2003.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2003.csv (CSV, 7 MB)
  • 2004: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2004 - Annual Report (PDF, 168 pp, 15 MB).
    • CMAQ Ozone, 12-km resolution grid, CMAQ_DS_O3_2004_12km.zip (ZIP, 288 MB)
    • CMAQ Ozone, 36-km resolution grid, CMAQ_DS_O3_2004_36km.zip (ZIP, 72 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2004_12km.zip (ZIP, 302 MB)
    • CMAQ PM2.5, 36-km resolution grid, CMAQ_DS_PM25_2004_36km.zip (ZIP, 75 MB)
    • AQS Ozone, ds.input.aqs.o3.2004.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2004.csv (CSV, 7 MB)
  • 2005: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2005 - Annual Report (PDF, 168 pp, 15 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2005_12km.zip (ZIP, 288 MB)
    • CMAQ Ozone, 36-km resolution grid, CMAQ_DS_O3_2005_36km.zip (ZIP, 72 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2005_12km.zip (ZIP, 301 MB)
    • CMAQ PM2.5, 36-km resolution grid, CMAQ_DS_PM25_2005_36km.zip (ZIP, 75 MB)
    • AQS Ozone, ds.input.aqs.o3.2005.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2005.csv (CSV, 7 MB)
  • 2006: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2006 - Annual Report (PDF, 168pp, 15 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2006_12km.zip (ZIP, 287 MB)
    • CMAQ Ozone, 36-km resolution grid, CMAQ_DS_O3_2006_36km.zip (ZIP, 72 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2006_12km.zip (ZIP, 301 MB)
    • CMAQ PM2.5, 36-km resolution grid, CMAQ_DS_PM25_2006_36km.zip (ZIP, 75 MB)
    • AQS Ozone, ds.input.aqs.o3.2006.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2006.csv (CSV, 6 MB)
  • 2007: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2007 - Annual Report (PDF, 298 pp, 11 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2007_12km.zip (ZIP, 592 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2007_12km.zip (ZIP, 617 MB)
    • AQS Ozone, ds.input.aqs.o3.2007.csv (CSV, 15 MB)
    • AQS PM2.5,  ds.input.aqs.pm25.2007.csv (CSV, 7 MB)
  • 2008: For descriptions of the input data, refer to the Hierarchical Bayesian Model (HBM)-Derived Estimates of Air Quality for 2008 - Annual Report (PDF, 192 pp, 6 MB).
    • CMAQ Ozone, 12-km resolution grid,  CMAQ_DS_O3_2008_12km.zip (ZIP, 592 MB)
    • CMAQ PM2.5, 12-km resolution grid,  CMAQ_DS_PM25_2008_12km.zip (ZIP, 619 MB)
    • AQS Ozone, ds.input.aqs.o3.2008.csv (CSV, 15 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2008.csv (CSV, 7 MB)
  • 2009
    • 8-Hour Ozone Maximum CMAQ, oz82009ctymsa.csv (8.36 MB)
    • 8-Hour Ozone Maximum Monitor, oz82009monitor.csv (3.36 MB)
    • PM 2.5 CMAQ, p252009ctymsa.csv (4.5 MB)
    • PM 2.5 Monitor, p252009monitor.csv (14 MB)
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2009.zip (ZIP, 751.7 MB)
    • Full Grid CMAQ PM25, ds_input_cmaq_pm25_2009.zip (ZIP, 762.8 MB)
  • 2010
    • 8-Hour Ozone Maximum CMAQ, oz82010ctymsa.csv (8.58 MB)
    • 8-Hour Ozone Maximum Monitor, oz82010monitor.csv (34.5 MB)
    • PM 2.5 CMAQ, p252010ctymsa.csv (4.32 MB)
    • PM 2.5 Monitor, p252010monitor.csv (13.36 MB)
    • Full Grid CMAQ Ozone,  ds_input_cmaq_ozone_2010.zip (ZIP, 752.5 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2010.zip (ZIP, 762.2 MB)
  • 2011
    • 8-Hour Ozone Maximum CMAQ, oz82011ctymsa.csv (9 MB)
    • 8-Hour Ozone Maximum Monitor, oz82011monitor.csv (36.3 MB)
    • PM 2.5 CMAQ, p252011ctymsa.csv (4 MB)
    • PM 2.5 Monitor, p252011monitor.csv (12.28 MB)
    • Full Grid CMAQ Ozone,  ds_input_cmaq_ozone_2011.zip (ZIP, 535.4 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2011.zip (ZIP, 543 MB)
  • 2012
    • 8-Hour Ozone Maximum CMAQ, oz82012ctymsa.csv (9.2 MB)
    • 8-Hour Ozone Maximum Monitor, oz82012monitor.csv (37.1 MB)
    • PM 2.5 CMAQ, p252012ctymsa.csv (3.87 MB)
    • PM 2.5 Monitor, p252012monitor.csv (11.77 MB)
    • Full Grid CMAQ Ozone,  ds_input_cmaq_ozone_2012.zip (ZIP, 536.7 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2012.zip (ZIP, 544.5 MB)
  • 2013
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2013.zip (ZIP, 751 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2013.zip (ZIP, 763.5 MB)
    • AQS Ozone, ds.input.aqs.o3.2013.csv (17.2 MB)
    • AQS PM 2.5, ds.input.aqs.pm25.2013.csv (5.1 MB)
  • 2014
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2014.zip (ZIP, 717 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2014.zip (ZIP, 728 MB)
    • AQS O3,  ds.input.aqs.o3.2014.csv (19 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2014.csv (11 MB)
  • 2015
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2015.zip (ZIP,  521.6 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2015.zip (ZIP, 530.5 MB)
    • AQS O3,  ds.input.aqs.o3.2015.csv (19 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2015.csv (11.8 MB)
  • 2016
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2016.zip (ZIP,  510 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2016.zip (ZIP, 519 MB)
    • AQS O3,  ds.input.aqs.o3.2016.csv (18.9 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2016.csv (12.2 MB)
  • 2017
    • Full Grid CMAQ Ozone, ds_input_cmaq_ozone_2017.zip (ZIP,  510 MB)
    • Full Grid CMAQ PM25,  ds_input_cmaq_pm25_2017.zip (ZIP, 519 MB)
    • AQS O3,  ds.input.aqs.o3.2017.csv (18.9 MB)
    • AQS PM2.5, ds.input.aqs.pm25.2017.csv (12.2 MB)

Disclaimer: The PDFs on this page are not completely formatted for screen readers or other assistive technology. For help with a document, contact Adam Reff, Air Quality Analysis Group, US EPA/OAR/OAQPS/AQAD. 

• Downscaling Output files (files compressed in gzip format):
  • 2002 (CONUS)
    • 8-Hour Ozone Daily Maximum (350 MB)
    • PM 2.5 Daily Average (345 MB)
  • 2003 (CONUS)
    • 8-Hour Ozone Daily Maximum (350 MB)
    • PM 2.5 Daily Average (345 MB)
  • 2004 (CONUS)
    • 8-Hour Ozone Daily Maximum (350 MB)
    • PM 2.5 Daily Average (346 MB)
  • 2005 (CONUS)
    • 8-Hour Ozone Daily Maximum (350 MB)
    • PM 2.5 Daily Average (345 MB)
  • 2006 (CONUS)
    • 8-Hour Ozone Daily Maximum (349 MB)
    • PM 2.5 Daily Average (344 MB)
  • 2007 (CONUS)
    • 8-Hour Ozone Daily Maximum (425 MB)
    • PM 2.5 Daily Average (419 MB)
  • 2008 (CONUS)
    • 8-Hour Ozone Daily Maximum (425 MB)
    • PM 2.5 Daily Average (419 MB)
  • 2009 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2009 Annual Report (PDF, 122 pp, 13.6MB).
    • 8-Hour Ozone Daily Maximum (469 MB)
    • PM 2.5 Daily Average (457 MB)
  • 2010 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2010 Annual Report (PDF, 98 pp, 7.5 MB).
    • 8-Hour Ozone Daily Maximum (470 MB)
    • PM 2.5 Daily Average (457 MB)
  • 2011 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2011 Annual Report (PDF, 108 pp, 6 MB).
    • 8-Hour Ozone Daily Maximum (470 MB)
    • PM 2.5 Daily Average (458 MB)
  • 2012 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2012 Annual Report (PDF, 110 pp, 6.6 MB).
    • 8-Hour Ozone Daily Maximum (481 MB)
    • PM 2.5 Daily Average (471 MB)
  • 2013 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2013 Annual Report (PDF, 114 pp, 11.3 MB). See also the supplemental spreadsheet for the 2013 report showing 2013 Emissions Totals by Sector (24 tabs, 903 KB, April 2017).  
    • 8-Hour Ozone Daily Maximum (481 MB)
    • PM 2.5 Daily Average (471 MB)
  • 2014 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2014 Annual Report (PDF, 120 pp, 11 MB).
    • 8-Hour Ozone Daily Maximum (446MB)
    • PM 2.5 Daily Average (446 MB)
  • 2015 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2015 Annual Report (PDF, 124 pp, 14 MB).
    • 8-Hour Ozone Daily Maximum (465 MB)
    • PM 2.5 Daily Average (459 MB)
  • 2016 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2016 Annual Report (PDF, 124 pp, 14 MB).
    • 8-Hour Ozone Daily Maximum (465 MB)
    • PM 2.5 Daily Average (459 MB)
  • 2017 (CONUS) -- For descriptions of the data, refer to the Bayesian space-time downscaling fusion model (downscaler) - Derived Estimates of Air Quality for 2017 Annual Report (PDF, 124 pp, 14 MB).
    • 8-Hour Ozone Daily Maximum (465 MB)
    • PM 2.5 Daily Average (459 MB)

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CMAQ Input Files

The EPA CMAQ model-gridded meteorology, emissions, depositions, and concentrations data subsets can be viewed and saved using RSIG2D/RSIG3D applications.

• Sector Emissions Files
• Initial Conditions / Boundary Conditions (ICBC) Files

The CMAQ files that are currently downloadable (sector emissions) can range in size from 5 MB to 500 MB for each simulation day. Also, there are hundreds of files per product, totalling thousands of files. If all the relevant files were combined into a single compressed file, the file would be too large to download from a web site before timing out.

However, if you require such files, you can obtain them in one of two ways:

1) Download and run a custom C-Shell script titled downloader. The downloader script lists all such available data "products" and downloads sets of files from an EPA server to your computer (which should be a Linux workstation you use to run CMAQ, with several terabytes of available disk space).

2) Use the File Oriented Downloader feature of RSIG3D (on the RSIG Web tab).

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