Influence of synoptic and mesoscale meteorology on ozone pollution potential for San Joaquin Valley of California

作者: Scott Beaver , Ahmet Palazoglu

DOI: 10.1016/J.ATMOSENV.2008.12.034

关键词: OzoneKatabatic windEnvironmental scienceAir quality indexClimatologyAir pollutionSan JoaquinMesoscale meteorologySynoptic scale meteorologyAtmospheric dispersion modeling

摘要: Abstract The distribution of historical ozone levels for a region is tabulated as function its prevailing synoptic and mesoscale influences. Meteorological patterns are determined sequentially from extended records hourly surface wind measurements sampling relevant low-level flows. A visualization method presented to readily indicate the likelihoods exceedances occur under variety meteorological conditions. study domain San Joaquin Valley (SJV) California, which divided into three subregions (North, Central, South). Each day May–October 1996–2004 labeled using (single-day) (intra-day) patterns. Emissions assumed roughly constant this period following introduction reformulated gasoline California. Synoptic motions largely control regional SJV pollution potential; same single-day identified all subregions. Additionally, unique flow feature in each subregion that strongly affects levels: flows through minor Coast Range gaps N-SJV, Fresno Eddy C-SJV, Mojave Pass S-SJV. strength characterized 1-h u or v components explain local potentials.

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