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AGU journal highlights -- March 25, 2009
Date:3/25/2009

er complicated by its proximity to the ocean. Nitryl chloride, a compound created by the reaction of sea salt with an oxide of nitrogen produced in urban atmospheres, can photodissociate into nitrogen dioxide and chlorine atoms. The former is a pollutant, and the latter has been shown to increase ground-level ozone formation. During the summer of 2006, nytril chloride mixing ratios of more than 1 part per billion (ppb) were measured in the Houston urban area. Through photochemical modeling, the authors find that nytril chloride increases the total reactive chlorine mass by 20 to 40 percent in the atmosphere of southeastern Texas. The nytril chloride caused widespread increases in ozone concentrations over Houston of 1 to 2 ppb; vertical dispersion and local atmospheric composition moderated the effect of nytril chloride on ozone mixing ratios.

Title: Modeling the impact of nitryl chloride on ozone formation in the Houston area

Authors: H. Simon: Center for Energy and Environmental Resources, University of Texas at Austin, Austin, Texas, U.S.A.; now at Atmospheric Modeling and Analysis Division, National Exposure Research Laboratory, Environmental Protection Agency, Research Triangle Park, North Carolina, U.S.A.;

Y. Kimura, G. McGaughey, and D. T. Allen: Center for Energy and Environmental Resources, University of Texas at Austin, Austin, Texas, U.S.A.;

S. S. Brown, J. M. Roberts: Chemical Sciences Division, Earth System Research Laboratory, NOAA, Boulder, Colorado U.S.A.;

H. D. Osthoff: Chemical Sciences Division, Earth System Research Laboratory, NOAA, Boulder, Colorado U.S.A.; now at Department of Chemistry, University of Calgary, Calgary, Alberta, Canada;

D. Byun: Department of Earth and Atmospheric Sciences, University of Houston, Houston, Texas, U.S.A.; now at Air Resources Laboratory, Office of Ocean and Atmospheric Research, NOAA, Silver Spring, Maryland, U.S.A.;

D. Lee: Department of Earth
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Contact: Maria-Jose Vinas
mjvinas@agu.org
202-777-7530
American Geophysical Union
Source:Eurekalert

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