Future year ozone source attribution modeling study using CMAQ-ISAM

Journal of the Air & Waste Management Association
Susan ColletTejas Shah

Abstract

To achieve the current United States National Ambient Air Quality Standards (NAAQS) attainment level for ozone or particulate matter, current photochemical air quality models include tools to determine source apportionment and/or source sensitivity. Previous studies by the authors have used the Ozone and Particulate Matter Source Apportionment Technology and Higher-order Decoupled Direct Method probing tools in CAMx to investigate these source-receptor relationships for ozone. The recently available source apportionment for CMAQ, referred to as the Integrated Source Apportionment Method (ISAM), was used in this study to conduct future year (2030) source attribution modeling. The CMAQ-ISAM ozone source attribution results for selected cities across the U.S. showed boundary conditions were the dominant contributor to the future year highest July maximum daily 8-hour average (MDA8) ozone concentrations. Point sources were generally larger contributors in the eastern U.S. than in the western U.S. The contributions of on-road mobile emissions were around 5 ppb at most of the cities selected for analysis. Off-road mobile source contributions were around 20 ppb or nearly 30%. Since boundary conditions play an important role in future ...Continue Reading

References

Mar 25, 2014·Journal of the Air & Waste Management Association·Susan ColletPrakash Karamchandani
Apr 6, 2017·Journal of the Air & Waste Management Association·Susan ColletJaegun Jung
Mar 16, 2016·Geophysical Research Letters·Daniel L GoldbergRussell R Dickerson

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Citations

Aug 25, 2018·Journal of the Air & Waste Management Association·Samuel L AltshulerJohn G Watson
Jun 6, 2020·Journal of Environmental Management·Willian Lemker AndreãoTaciana Toledo de Almeida Albuquerque

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Software Mentioned

MOVES2014
SMOKE
GEOS
Chem
CMAQ
MOVES
CAMx
MEGAN
PSAT
Sparse Matrix Operator Kernel Emissions ( SMOKE )

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