engleski

Atmospheric boundary layer characteristics during high ozone concentrations in the Rijeka Bay area

In this study, a time series from the ground level ozone monitoring station for Rijeka (Croatia) as well as the associated meteorological conditions were investigated. In the summer, during 13 to 19 August 2000, the afternoon hourly ozone measurements were consistently higher than the 180 μ g m-3 which represents an information threshold of pollutant concentrations according to the national standards. During the night the ozone concentrations were unusually very high as well, above 100 μ g m-3. An analysis of the observations was performed to identify characteristics of the low-level wind in the Rijeka Bay and the results of a nonhydrostatic mesoscale meteorological model WRF were compared with the observations with respect to these characteristics. The contribution of the distant pollution sources to observed concentrations was evaluated by the atmospheric chemical model EMEP.

ozone; sea/land breeze; slope winds; north-eastern Adriatic

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