title: Decomposing the profile of PM in two low polluted German cities--mapping of air mass residence time, focusing on potential long range transport impacts.
abstract: This paper aims to decompose the profile of particulates in Karlsruhe and Potsdam (Germany), focusing on the localization of PM potential transboundary sources. An air mass cluster analysis was implemented, followed by a study of air mass residence time on a grid of a 0.5° × 0.5° resolution. Particulate/gaseous daily air pollution and meteorological data were used to indicate PM local sources. Four Principal Component Analysis (PCA) components were produced: traffic, photochemical, industrial/domestic and particulate. PM2.5/PM10 ratio seasonal trends, indicated production of PMCOARSE (PM10-PM2.5) from secondary sources in Potsdam during warm period (WP). The residing areas of incoming slow moving air masses are potential transboundary PM sources. For Karlsruhe those areas were mainly around the city. An air mass residence time secondary peak was observed over Stuttgart. For Potsdam, areas with increased dwelling time of the arriving air parcels were detected particularly above E/SE Germany.
authors.affiliation: Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Dimitriou
authors.affiliation: Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece. Electronic address: pkassom@uoi.gr.
authors.forename: Pavlos
authors.initials: P
authors.lastname: Kassomenos
mesh_terms: D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000706:statistics & numerical data; D001272:Atmosphere / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D005858:Germany; D052638:Particulate Matter / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter
keywords: Air mass trajectories; Air quality; Cluster analysis; Germany; PM(10); PM(2.5); Residence time