Surface ozone and NOx concentrations at a high altitude Mediterranean site,Greece |
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| Institution: | 1. Institute for Environmental Research and Suitable Development, National Observatory of Athens, 15236 P. Penteli, Greece;2. Pathology Department, University of Athens, Medical School, Athens, Greece;3. Environmental Research Laboratory/INT-RP, National Center for Scientific Research “DEMOKRITOS”, 153 10, Aghia Paraskevi Attikis, Athens, Greece;4. Department of Environmental Physics-Meteorology, Faculty of Physics, University of Athens, University Campus, 15784 Athens, Greece;1. Department of Environmental and Natural Resources Management, University of Patras, GR-30100 Agrinion, Greece;2. Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece;3. Department of Biology, Section of Animal Biology, School of Natural Sciences, University of Patras, GR-26500, Patras, Greece;4. Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;5. Department of Forestry and Management of the Environment and Natural Resources, Democritus University of Thrace, GR-68200 Orestiada, Greece;6. Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece |
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| Abstract: | Ozone was measured in six- and NOx in five sampling periods in 1996–97, mostly during summer, at a 1070 m altitude site in northern Peloponnese. Mean values in each sampling period ranged from 43–48 ppb exceeding the European Union 24 h plant protection standard. The background ozone concentration of 43 ppb derived from the correlation of ozone with NO′x also exceeded the EU plant protection standard. Ozone exhibited maxima in the afternoon and minima during the night; in certain 24–48 h periods, however, the ozone concentrations remained practically constant; in these short periods air mass back trajectories indicated air masses which originated in north Africa. NO′x concentrations had maximum of 24 h around noon. Their mean concentrations ranged from 0.5–0.7 ppb, smaller than respective concentrations in north-central Europe. |
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