a7fd531c-b6ed-4edd-8b6d-20a28d71270f eng utf8 dataset Brian Stitt U.S. Environmental Protection Agency, Office of Air and Radiation-Office of Air Quality Planning and Standards EDG Steward 919-541-3757 109 T.W. Alexander Drive Research Triangle Park NC 27709 stitt.brian@epa.gov https://www.epa.gov/aboutepa/oei.html distributor 2021-06-17 NAP - Metadata 1.2 2012 and 2013 Air Quality Fused Surface for the Conterminous U.S. Map Service 2016-06-15 publication U.S. EPA Office of Air and Radiation (OAR) - Office of Air Quality Planning and Standards (OAQPS) Research Triangle Park, NC publisher US Environmental Protection Agency originator This web service contains a polygon layer that depicts fused air quality predictions for 2012, 2013, and 2014 for census tracts in the conterminous United States. Fused air quality predictions (for ozone and PM2.5) are modeled using a Bayesian space-time downscaling fusion model approach described in a series of three published journal papers: 1) (Berrocal, V., Gelfand, A. E. and Holland, D. M. (2012). Space-time fusion under error in computer model output: an application to modeling air quality. Biometrics 68, 837-848; 2) Berrocal, V., Gelfand, A. E. and Holland, D. M. (2010). A bivariate space-time downscaler under space and time misalignment. The Annals of Applied Statistics 4, 1942-1975; and 3) Berrocal, V., Gelfand, A. E., and Holland, D. M. (2010). A spatio-temporal downscaler for output from numerical models. J. of Agricultural, Biological,and Environmental Statistics 15, 176-197) is used to provide daily, predictive PM2.5 (daily average) and O3 (daily 8-hr maximum) surfaces for 2012, 2013, and 2014. Summer (O3) and annual (PM2.5) means calculated and published. The downscaling fusion model uses both air quality monitoring data from the National Air Monitoring Stations/State and Local Air Monitoring Stations (NAMS/SLAMS) and numerical output from the Models-3/Community Multiscale Air Quality (CMAQ). Currently, predictions at the US census tract centroid locations within the 12 km CMAQ domain are archived. Predictions at the CMAQ grid cell centroids, or any desired set of locations could be provided if needed. Predictions are not provided on December 31st of any year because complete daily CMAQ output are not available on those days after conversion of GMT to local eastern time. completed Brian Stitt U.S. Environmental Protection Agency, Office of Air and Radiation-Office of Air Quality Planning and Standards EDG Steward 919-541-3757 109 T.W. Alexander Drive Research Triangle Park NC 27709 stitt.brian@epa.gov https://www.epa.gov/aboutepa/oei.html publisher United States place EPA Place Names 2015-01-31 publication Air theme EPA GIS Keyword Thesaurus 020:072 theme Federal Program Inventory 2013-09-16 publication None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. EPA Public Domain License https://edg.epa.gov/EPA_Data_License.html licenseUnrestricted https://edg.epa.gov/EPA_Data_License.html unclassified http://project-open-data.github.io/schema/#accessLevel Standard Technical Controls eng utf8 Publication date 2012-01-01 2014-01-01 -138.21454852 -12.68151645 6.65223303 61.7110157 Brian Stitt U.S. Environmental Protection Agency, Office of Air and Radiation-Office of Air Quality Planning and Standards EDG Steward 919-541-3757 109 T.W. Alexander Drive Research Triangle Park NC 27709 stitt.brian@epa.gov https://www.epa.gov/aboutepa/oei.html distributor https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/Fused_AQ_Predictions_Downscaling/MapServer webMapService dataset Tests for integrity have not been performed. Features represented have not been tested for completeness Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at http://epa.gov/geospatial/policies.html) Web service published 2016-06-14T00:00:00 Brian Stitt U.S. Environmental Protection Agency, Office of Air and Radiation-Office of Air Quality Planning and Standards EDG Steward 919-541-3757 109 T.W. Alexander Drive Research Triangle Park NC 27709 stitt.brian@epa.gov https://www.epa.gov/aboutepa/oei.html processor unknown 2022-03-08