The wind speed dependence of the concentrations of airborne particulate matter and NOx |
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| Authors: | Alan M Jones Roy M Harrison J Baker |
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| Institution: | 1. Democritus University of Thrace, Department of Forestry and Management of the Environment and Natural Resources, GR-68200 Orestiada, Greece;2. University of Ioannina, Department of Physics, GR-45110 Ioannina, Greece;1. Department of Chemical and Environmental Engineering, The University of Arizona, Tucson, AZ 85721, United States;2. School of Natural Resources and the Environment, The University of Arizona, Tucson, AZ 85721, United States;3. Departamento de Ciencias Básicas, Universidad Autónoma de Ciudad Juárez, 32538 Juárez, Chihuahua, Mexico;4. Department of Atmospheric Sciences, The University of Arizona, Tucson, AZ 85721, United States |
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| Abstract: | The wind speed dependence of concentrations of PM10, chloride, sulphate, nitrate, organic carbon, elemental carbon, particle number and NOx has been determined at three separate sites, Marylebone Road (kerbside), North Kensington (urban background) and Harwell (rural). The data are best described by a general dilution term multiplied by up to three separate source-related terms which we interpret as representing long-range transport sources, discrete local (including area) sources and marine sources respectively. Using this approach, the various particulate metrics can be quantitatively disaggregated according to the contributions of the three source types. The behaviour of nitrate is anomalous, probably due to an influence of wind speed upon the dissociation of ammonium nitrate. |
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