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Environ Sci Technol

Title:		Modeling Ozone in the Eastern U.S. using a Fuel-Based Mobile Source Emissions Inventory
Author(s):		McDonald BC; McKeen SA; Cui YY; Ahmadov R; Kim SW; Frost GJ; Pollack IB; Peischl J; Ryerson TB; Holloway JS; Graus M; Warneke C; Gilman JB; de Gouw JA; Kaiser J; Keutsch FN; Hanisco TF; Wolfe GM; Trainer M;
Address:		"Cooperative Institute for Research in Environmental Sciences, University of Colorado , Boulder , Colorado 80309 , United States. Chemical Sciences Division , NOAA Earth System Research Laboratory , Boulder , Colorado 80305 , United States. Global Systems Division , NOAA Earth System Research Laboratory , Boulder , Colorado 80305 , United States. Department of Chemistry , University of Wisconsin , Madison , Wisconsin 53706 , United States. Atmospheric Chemistry and Dynamics Laboratory , NASA Goddard Space Flight Center , Greenbelt , Maryland 20771 , United States. Joint Center for Earth Systems Technology , University of Maryland Baltimore County , Baltimore , Maryland 21228 , United States"
Journal Title:		Environ Sci Technol
Year:		2018
Volume:		20180622
Issue:		13
Page Number:		7360 - 7370
DOI:		10.1021/acs.est.8b00778
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Recent studies suggest overestimates in current U.S. emission inventories of nitrogen oxides (NO (x) = NO + NO(2)). Here, we expand a previously developed fuel-based inventory of motor-vehicle emissions (FIVE) to the continental U.S. for the year 2013, and evaluate our estimates of mobile source emissions with the U.S. Environmental Protection Agency's National Emissions Inventory (NEI) interpolated to 2013. We find that mobile source emissions of NO (x) and carbon monoxide (CO) in the NEI are higher than FIVE by 28% and 90%, respectively. Using a chemical transport model, we model mobile source emissions from FIVE, and find consistent levels of urban NO (x) and CO as measured during the Southeast Nexus (SENEX) Study in 2013. Lastly, we assess the sensitivity of ozone (O(3)) over the Eastern U.S. to uncertainties in mobile source NO (x) emissions and biogenic volatile organic compound (VOC) emissions. The ground-level O(3) is sensitive to reductions in mobile source NO (x) emissions, most notably in the Southeastern U.S. and during O(3) exceedance events, under the revised standard proposed in 2015 (>70 ppb, 8 h maximum). This suggests that decreasing mobile source NO (x) emissions could help in meeting more stringent O(3) standards in the future"
Keywords:		*Air Pollutants Nitrogen Oxides *Ozone Southeastern United States Vehicle Emissions;
Notes:		"MedlineMcDonald, Brian C McKeen, Stuart A Cui, Yu Yan Ahmadov, Ravan Kim, Si-Wan Frost, Gregory J Pollack, Ilana B Peischl, Jeff Ryerson, Thomas B Holloway, John S Graus, Martin Warneke, Carsten Gilman, Jessica B de Gouw, Joost A Kaiser, Jennifer Keutsch, Frank N Hanisco, Thomas F Wolfe, Glenn M Trainer, Michael eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2018/06/06 Environ Sci Technol. 2018 Jul 3; 52(13):7360-7370. doi: 10.1021/acs.est.8b00778. Epub 2018 Jun 22"