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Atmosphere 2018, 9(9), 354; https://doi.org/10.3390/atmos9090354

Future-Year Ozone Isopleths for South Coast, San Joaquin Valley, and Maryland

1
Toyota Motor Engineering and Manufacturing North America, Inc., Ann Arbor, MI 48105, USA
2
Toyota Motor Corporation, Shizuoka 410-1198, Japan
3
Ramboll U.S. Corporation, Novato, CA 94998, USA
*
Author to whom correspondence should be addressed.
Received: 24 August 2018 / Revised: 11 September 2018 / Accepted: 12 September 2018 / Published: 14 September 2018
(This article belongs to the Special Issue Air Quality Prediction)
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Abstract

Many areas of the United States are working toward achieving the 2015 ozone National Ambient Air Quality Standard (NAAQS) attainment level. The objective of this study was to develop future-year (2030) volatile organic compounds and nitrogen oxides (VOC-NOx) isopleth diagrams of the 4th highest maximum daily 8-h average ozone design value concentrations at monitors of interest in the South Coast Air Basin (SoCAB) and San Joaquin Valley (SJV) in California, and in Maryland. The simulation results showed there would be attainment of the 2015 ozone NAAQS in 2030 without further controls at the selected monitors: 27% in SoCAB, 57% in SJV, and 100% in Maryland. The SoCAB ozone isopleths developed in this study were compared with those reported in the South Coast Air Quality Management District 2016 Air Quality Management Plan. There are several differences between the two modeling studies, the results are qualitatively similar for most of the monitors in the relative amounts of additional emission reductions needed to achieve the ozone NAAQS. The results of this study provide insight into designing potential control strategies for ozone attainment in future years for areas currently in non-attainment. Additional photochemical modeling using these strategies can then provide confirmation of the effectiveness of the controls. View Full-Text
Keywords: ozone; attainment; isopleth; empirical kinetic modeling approach; EKMA; South Coast Air Basin; San Joaquin Valley; Maryland ozone; attainment; isopleth; empirical kinetic modeling approach; EKMA; South Coast Air Basin; San Joaquin Valley; Maryland
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Collet, S.; Kidokoro, T.; Karamchandani, P.; Shah, T. Future-Year Ozone Isopleths for South Coast, San Joaquin Valley, and Maryland. Atmosphere 2018, 9, 354.

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