Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modeling potential ozone impacts from natural hydrocarbons—II. Hypothetical biogenic HC emission scenario modeling
Abstract A photochemical mechanism describing photooxidation of biogenic and anthropogenic hydrocarbons in the presence of NOx has been incorporated into a photochemical box model to study potential atmospheric O3 formation from natural hydrocarbon emissions. O3 predictions under worst-case meteorological conditions are reported for various combinations of natural and man-made emissions in rural and urban environments. Results from the study show O3 production by natural emissions in rural environments is small or negative due to the scarcity of NOx. However, downwind of isolated NOx sources, O3 production can be substantially enhanced by natural emissions. Similarly, the results show O3 production in urban areas can be slightly enhanced by upwind biogenic hydrocarbon emissions. Natural organic emission rates of 100 μg m−2 min−1 were found to produce isoprene concentrations at least a factor of two greater than ambient observations, whereas, emission rates of 20μg m−2 min−1 gave good agreement between predicted and observed ambient isoprene levels.
Modeling potential ozone impacts from natural hydrocarbons—II. Hypothetical biogenic HC emission scenario modeling
Abstract A photochemical mechanism describing photooxidation of biogenic and anthropogenic hydrocarbons in the presence of NOx has been incorporated into a photochemical box model to study potential atmospheric O3 formation from natural hydrocarbon emissions. O3 predictions under worst-case meteorological conditions are reported for various combinations of natural and man-made emissions in rural and urban environments. Results from the study show O3 production by natural emissions in rural environments is small or negative due to the scarcity of NOx. However, downwind of isolated NOx sources, O3 production can be substantially enhanced by natural emissions. Similarly, the results show O3 production in urban areas can be slightly enhanced by upwind biogenic hydrocarbon emissions. Natural organic emission rates of 100 μg m−2 min−1 were found to produce isoprene concentrations at least a factor of two greater than ambient observations, whereas, emission rates of 20μg m−2 min−1 gave good agreement between predicted and observed ambient isoprene levels.
Modeling potential ozone impacts from natural hydrocarbons—II. Hypothetical biogenic HC emission scenario modeling
Lurmann, Frederick W (Autor:in) / Lloyd, Alan C (Autor:in) / Bonnie, Nitta (Autor:in)
Atmospheric Environment ; 17 ; 1951-1963
12.01.1983
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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