Evaluation of a number of chemical mechanisms for their application in models describing the formation of photochemical ozone in Europe |
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| Institution: | 1. Department of Ophthalmology, the First Affiliated Hospital of Zhejiang University, Hangzhou 310003, China;2. Eye Hospital of Shandong First Medical University (Shandong Eye Hospital), Eye Institute of Shandong First Medical University, State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Jinan 250299, China;3. School of Ophthalmology, Shandong First Medical University, Jinan 250118, China;1. Laboratorio Universitario de Química y Contaminación del Aire ((L.U.Q.C.A), Institute for Research in Physical Chemistry of Córdoba (I.N.F.I.Q.C.), Department of Physical Chemistry, Faculty of Chemical Sciences, National University of Córdoba, University City, Córdoba 5000, Argentina;2. Institute for Atmospheric and Environmental Research, University of Wuppertal, Wuppertal DE-42097, Germany;1. School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China;2. Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu 241000, China;3. School of Geography and Tourism, Anhui Normal University, Wuhu 241000, China;4. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;5. CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China |
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| Abstract: | A series of 24 chemical mechanisms from the literature are compared against each other using harmonized emissions, photolysis rate coefficients for simple inorganic chemistry and life cycle data for ozone, PAN and H2O2. The evaluation sought to understand the impact of parameterizing hydrocarbon oxidation on the peak concentrations of photochemically-generated secondary pollutants. Only seven of the 24 chemical mechanisms gave peak concentrations of ozone, PAN and H2O2 simultaneously in their respective central ranges. PAN and H2O2 were generally calculated with a much lower precision compared to ozone. Only 11 mechanisms out of 24 gave responses to both 50% hydrocarbons and NOx emissions controls in their respective central bands. The lack of coordinated ozone, PAN and hydrogen peroxide measurements across Europe currently limits the adequacy of model comparisons and hence the confidence which may be placed in assessments of likely impacts of future control strategies. |
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