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RSIG-Related Downloadable Data Files

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

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. 

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. 

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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.

However, there are other input data files used to run CMAQ that are not viewable in RSIG2D/3D such as:
  • 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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