Origin and influence of PM10 in urban and in rural environments

Other literature type English OPEN
Kerschbaumer, A. ; Lutz, M. (2008)

The paper presents an estimate of emission source influence on PM<sub>10</sub> concentrations in Berlin. Particulate matter less than 10 &mu;m in aerodynamic diameter (PM<sub>10</sub>) is a conglomerate of different chemical components related to distinct sources and physico-chemical processes in the atmosphere and lithosphere. Emission reduction thus has temporally and spatially varying effects on different scales. Urban PM<sub>10</sub> concentrations are heavily influenced by long range transport (up to 70%) from remote source areas, whereas rural air pollution is strongly determined by urban emissions. By means of emission reduction scenario simulations with a chemistry-transport-model it has been found that on average two third of the urban background concentrations in Berlin are due to Berlin-specific emissions. This percentage varies strongly considering primary and secondary components: only about 5% of secondary PM<sub>10</sub> concentrations are related to local emissions, while approximately 70% of primary concentrations stem from the urban sources. City related emissions influence homogenously the rural air-pollution concentrations, but with different ranges of influence.
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