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Abstract:
Near-surface concentrations of ozone over the Baikal region were assessed using ozone observations from GOME-2
instrument onboard the MetOp-A satellite. High resolution ozone profiles were provided by EUMETSAT. In order to
verify near surface ozone concentrations obtained from satellite data, a comparison was performed with observations at
ground stations. It was shown that the two measurements were consistent, that is the time series of satellite data describe
well seasonal changes and are also appropriate for regional air pollution assessment. However, there are limitations
on using satellite data for predicting instant ozone concentrations and urban pollution. Spatial distributions of mean
annual and seasonal ozone concentrations were derived for the Baikal region. These evidence distinct seasonality in
surface ozone concentrations with maxima and minima falling on spring and autumn months, respectively, throughout
the entire region. According to the satellite data, ozone concentrations in remote mountainous areas are higher in
comparison with those from industrial regions of Angara and Selenga river valleys.
