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The Sensitivity of Modeled Ozone to the Temporal Distribution of Point, Area, and Mobile Emissions in the Eastern US

dc.contributor.authorCastellanos, Patricia
dc.contributor.authorEhrman, Sheryl H.
dc.contributor.authorStehr, Jeffrey W.
dc.contributor.authorDickerson, Russell R.
dc.date.accessioned2009-03-04T17:37:23Z
dc.date.available2009-03-04T17:37:23Z
dc.date.issued2009
dc.identifier.citationThe Sensitivity of Modeled Ozone to the Temporal Distribution of Point, Area, and Mobile Emissions in the Eastern US, P. Castellanos, S. H. Ehrman, R. R. Dickerson, J. W. Stehr, Atmos. Environ., submitted, 2009.en
dc.identifier.urihttp://hdl.handle.net/1903/8946
dc.description.abstractOzone remains one of the most recalcitrant air pollution problems in the US. Hourly emissions fields used in air quality models (AQMs) generally show less temporal variability than corresponding measurements. In order to understand how the daily cycle of estimated emissions affects modeled ozone, we analyzed the effects of altering all anthropogenic emissions’ temporal distributions by source group 2 on 2002 summer-long simulations of ozone using the Community Multi-Scale Air Quality Model (CMAQ) v4.5 and the carbon bond IV (CBIV) chemical mechanism with a 12 km grid. We find that when mobile source emissions were made constant over the course of a day, 8-hour maximum ozone predictions changed by ±7 parts per billion by volume (ppbv) in urban areas on days when ozone concentrations greater than 80 ppbv were simulated in the base case. Increasing the temporal variation of point sources resulted in ozone changes of +6 and –6 ppbv, but only for small areas near sources. Changing the daily cycle of mobile source emissions produces substantial changes in simulated ozone, especially in urban areas at night; implications for abatement strategy are discussed.en
dc.format.extent580755 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.publisherElsevieren
dc.subjectair pollutionen
dc.subjectemissionsen
dc.subjectair qualityen
dc.subjectozoneen
dc.titleThe Sensitivity of Modeled Ozone to the Temporal Distribution of Point, Area, and Mobile Emissions in the Eastern USen
dc.typeArticleen
dc.relation.isAvailableAtCollege of Computer, Mathematical & Physical Sciencesen_us
dc.relation.isAvailableAtAtmospheric & Oceanic Scienceen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.rights.licensehttp://www.elsevier.com/wps/find/journaldescription.cws_home/246/description#description


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