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Variation in ozone exposure in the landscape of southern Sweden with consideration of topography and coastal climate

Journal article
Authors Jenny Klingberg
Per Erik Karlsson
Gunilla Pihl Karlsson
Yumei Hu
Deliang Chen
Håkan Pleijel
Published in Atmospheric Environment
Volume 47
Pages 252-260
ISSN 1352-2310
Publication year 2012
Published at Department of Earth Sciences
Department of Plant and Environmental Sciences
Pages 252-260
Language en
Links dx.doi.org/10.1016/j.atmosenv.2011....
Keywords Diurnal ozone range, Diurnal temperature range, Temperature inversion, Local topography, Southern Sweden
Subject categories Meteorology and Atmospheric Sciences, Biological Sciences

Abstract

Ozone concentrations ([O3]) and meteorological parameters were measured with a mobile monitoring station at two coastal and five inland sites in southwest Sweden. Three of the five inland sites were located topographically low and two high compared to the surrounding landscape. In addition, [O3] data from six permanent monitoring stations in southern Sweden were analysed in relation to the positions of the measurement sites in the landscape. [O3] was also measured with passive diffusion samplers at two other sites. Both the diurnal temperature range (DTR) and the diurnal [O3] range (DOR) were to a large extent explained by the strength of the nocturnal temperature inversions at the sites. To investigate the influence of topography, the relative altitude of the sites was defined as the average altitude within a 3 km radius subtracted from the altitude of the site. Statistically significant relationships were obtained for average [O3] as well as DOR with relative altitude. Inland low sites experienced stronger nocturnal temperature inversions, lower average [O3] and larger DOR compared to inland high and coastal sites. Relative altitude was found to be superior to site altitude in explaining the variation of average [O3] and DOR in the landscape. This study underlines the importance of including local topography, as well as vicinity to the coast, in modelling [O3] and in O3 environmental risk assessments.

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