naa a22 4500 510749917 CHVBK 20180411083100.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11270-013-1603-4 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1603-4 Surface Ozone in the Marine Environment—Horizontal Ozone Concentration Gradients in Coastal Areas [Elektronische Daten] [Håkan Pleijel, Jenny Klingberg, Gunilla Pihl Karlsson, Magnuz Engardt, Per Karlsson] Spring/summer surface ozone concentrations, [O3], in coastal environments were investigated: (1) by comparison of coastal and inland monitoring stations with data from a small island >5km off the coast of southwest Sweden, (2) as a gradient from the coast towards inland in southernmost Sweden. Further, results from the chemical transport model MATCH were used to assess the marine influence on [O3]. It was hypothesised that [O3] is higher on the small island compared to the coast, especially during night and in offshore wind. Another hypothesis was that [O3] declines from the coast towards inland. Our hypotheses were based on observations that the deposition velocity of O3 to sea surfaces is lower than to terrestrial surfaces, and that vertical air mixing is stronger in the marine environment, especially during night. The island experienced 10% higher [O3] compared to the coast. This difference was larger with offshore (15%) than onshore wind (9%). The concentration difference between island and coast was larger during night, but prevailed during day and could not be explained by differences in [NO2] between the sites. The difference in [O3] between the island and the inland site was 20%. Higher [O3] over the sea, especially during night, was reproduced by MATCH. In the gradient study, [O3] declined from the coast towards inland. Both [O3] and [NO2] were elevated at the coast, indicating that the gradient in [O3] from the coast was not caused by NO titration. The conclusions were that surface [O3] in marine environments is higher than in coastal, and higher in coastal than inland areas, especially during night. Springer Science+Business Media Dordrecht, 2013 Ozone nationallicence Wind direction nationallicence Coast nationallicence Marine boundary layer nationallicence Terrestrial boundary layer nationallicence Nitrogen dioxide nationallicence Pleijel Håkan Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, 40530, Göteborg, Sweden aut Klingberg Jenny Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, 40530, Göteborg, Sweden aut Pihl Karlsson Gunilla IVL Swedish Environmental Research Institute Inc., P.O. Box 53021, 40014, Göteborg, Sweden aut Engardt Magnuz Swedish Meteorological and Hydrological Institute, Folkborgsvägen 1, 60176, Norrköping, Sweden aut Karlsson Per IVL Swedish Environmental Research Institute Inc., P.O. Box 53021, 40014, Göteborg, Sweden aut Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-10 0049-6979 224:7<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1603-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1603-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pleijel Håkan Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, 40530, Göteborg, Sweden aut NATIONALLICENCE 700 1- Klingberg Jenny Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, 40530, Göteborg, Sweden aut NATIONALLICENCE 700 1- Pihl Karlsson Gunilla IVL Swedish Environmental Research Institute Inc., P.O. Box 53021, 40014, Göteborg, Sweden aut NATIONALLICENCE 700 1- Engardt Magnuz Swedish Meteorological and Hydrological Institute, Folkborgsvägen 1, 60176, Norrköping, Sweden aut NATIONALLICENCE 700 1- Karlsson Per IVL Swedish Environmental Research Institute Inc., P.O. Box 53021, 40014, Göteborg, Sweden aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-10 0049-6979 224:7<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer