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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/165897

The Impact of Iodide-Mediated Ozone Deposition and Halogen Chemistry on Surface Ozone Concentrations Across the Continental United States

AutorGantt, B.; Sarwar, G.; Xing, J.; Simon, H.; Schwede, D.; Hutzell, W.T.; Mathur, R.; Saiz-Lopez, A.
Fecha de publicación2017
EditorAmerican Chemical Society
CitaciónEnvironmental Science and Technology 51: 1458- 1466 (2017)
ResumenThe air quality of many large coastal areas in the United States is affected by the confluence of polluted urban and relatively clean marine airmasses, each with distinct atmospheric chemistry. In this context, the role of iodide-mediated ozone (O) deposition over seawater and marine halogen chemistry accounted for in both the lateral boundary conditions and coastal waters surrounding the continental U.S. is examined using the Community Multiscale Air Quality (CMAQ) model. Several nested simulations are conducted in which these halogen processes are implemented separately in the continental U.S. and hemispheric CMAQ domains, the latter providing lateral boundary conditions for the former. Overall, it is the combination of these processes within both the continental U.S. domain and from lateral boundary conditions that lead to the largest reductions in modeled surface O concentrations. Predicted reductions in surface O concentrations occur mainly along the coast where CMAQ typically has large overpredictions. These results suggest that a realistic representation of halogen processes in marine regions can improve model prediction of O concentrations near the coast.
Identificadoresdoi: 10.1021/acs.est.6b03556
issn: 1520-5851
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