,

The average of W126 which is a weighted measure of chronic (lower level) ozone exposure within a landscape analysis unit. Updated through 2018. Data used are sourced from the EPA's Air Quality System Data Mart: https://aqs.epa.gov/aqsweb/airdata/download_files.html

The average of N100 which is the sum of hours over 100 ppb in a given month and captures peak events of high exposure or acute exposure. Updated through 2018. Data used are sourced from the EPA's Air Quality System Data Mart: https://aqs.epa.gov/aqsweb/airdata/download_files.html

Data include public CMAQv5.3-5.4 code, the exact CMAQ code used in the accompanying manuscript, chemistry box model (F0AM) inputs, and CMAQ predictions of ozone at AQS sites. Ozone units are ppb unless otherwise indicated.

Data include public CMAQv5.3-5.4 code, the exact CMAQ code used in the accompanying manuscript, chemistry box model (F0AM) inputs, and CMAQ predictions of ozone at AQS sites. Ozone units are ppb unless otherwise indicated.

Files containing daily maximum 8-hr ozone mixing ratio observations and WRF/CMAQ simulations that were contributed by EPA/ORD/CEMM/AESMD researchers to the manuscript “Assessing the manageable portion of ground-level ozone in the contiguous United States”. This dataset is associated with the following publication: Luo, H., M. Astitha, C. Hogrefe, R. Mathur, and S.T. Rao. Assessing the manageable portion of the ozone problem in the contiguous United States. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION. Air & Waste Management Association, Pittsburgh, PA, USA, 70(11): 1136-1147, (2020).

Files containing daily maximum 8-hr ozone mixing ratio observations and WRF/CMAQ simulations that were contributed by EPA/ORD/CEMM/AESMD researchers to the manuscript “Assessing the manageable portion of ground-level ozone in the contiguous United States”. This dataset is associated with the following publication: Luo, H., M. Astitha, C. Hogrefe, R. Mathur, and S.T. Rao. Assessing the manageable portion of the ozone problem in the contiguous United States. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION. Air & Waste Management Association, Pittsburgh, PA, USA, 70(11): 1136-1147, (2020).

The Nonattainment Area - 8 hr Ozone (1997) dataset was designated on June 15, 2004 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset provides detailed information about areas identified in the U.S. where ground-level ozone have not met the National Ambient Air Quality Standards (NAAQS) established in 1997 for ground-level ozone and have been designated "nonattainment areas (NAA)". This dataset also shows the nonattainment areas at the time of the 8-Hour Ozone (1997) National Ambient Air Quality Standards (NAAQS) revocation on April 6, 2015. These data are weekly from an OAQPS internal database. However, that does not necessarily mean the data have changed. For more information about this non-attainment area, please see the website https://www.epa.gov/green-book/green-book-8-hour-ozone-1997-area-information-naaqs-revoked.

This dataset contains the data contributed by EPA/ORD/NERL/CED researchers to the manuscript "Seasonal ozone vertical profiles over North America using the AQMEII group of air quality models: model inter-comparison and stratospheric intrusions" led by Dr. Marina Astitha of the University of Connecticut. This dataset is associated with the following publication: Astitha, M., I. Kioutskioukis, G.A. Fisseha, R. Bianconi, J. Bieser, J. Christensen, O. Cooper, S. Galmarini, C. Hogrefe, U. Im, B. Johnson, P. Liu, U. Nopmongcol, I. Petropavlovskikh, E. Solazzo, D. Tarasick, and G. Yarwood. Seasonal ozone vertical profiles over North America using the AQMEII3 group of air quality models: model inter-comparison and stratospheric intrusions. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, GERMANY, 18(19): 13925-13945, (2018).

This dataset contains the data contributed by EPA/ORD/NERL/CED researchers to the manuscript "Seasonal ozone vertical profiles over North America using the AQMEII group of air quality models: model inter-comparison and stratospheric intrusions" led by Dr. Marina Astitha of the University of Connecticut. This dataset is associated with the following publication: Astitha, M., I. Kioutskioukis, G.A. Fisseha, R. Bianconi, J. Bieser, J. Christensen, O. Cooper, S. Galmarini, C. Hogrefe, U. Im, B. Johnson, P. Liu, U. Nopmongcol, I. Petropavlovskikh, E. Solazzo, D. Tarasick, and G. Yarwood. Seasonal ozone vertical profiles over North America using the AQMEII3 group of air quality models: model inter-comparison and stratospheric intrusions. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, GERMANY, 18(19): 13925-13945, (2018).