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Atmospheric and Oceanic Optics

2017 year, number 1

Ozone over St. Petersburg: Experimental data and numerical modeling

Yu.M. Timofeyev1, Ya.A. Virolainen1, S.P. Smyshlyaev2, M.A. Motsakov2
1Saint-Petersburg State University, University Embankment, 7-9, St. Petersburg, 7/9, 199034
2Russian State Hydrometeorological University, Malookhtinskaya naberezhnaya, 98, St. Petersburg, 195196
Keywords: атмосферный озон, модели атмосферы, дистанционные методы измерений, atmospheric ozone, atmospheric models, remote sensing methods

Abstract

The comparison of results of ozone fields numerical modeling with various experimental data allows assessing the quality of models for using them in predicting the ozone layer development. We compare satellite (SBUV) and ground-based (IFS Bruker 125HR) measurements of ozone in two atmospheric layers (0-25 and 25-60 km) with numerical simulation data (Lower and Middle Atmosphere Model) over St. Petersburg for the period between 2011 and 2014. We analyze the differences between coincident data pairs for daily and monthly averaged values. In general, model describes the experimental ozone with good or satisfactory accuracy. However, we observed some systematic differences between measured and modeled ozone contents for some periods. Usually, model overestimates the ozone columns compared to satellite measurements in 0-25 km layer and underestimates them in 25-60 km layer for the autumn-winter period. The same features we observed for daily and monthly averages. In some cases, model describes high frequency fluctuations of ozone columns, which are not observed in experimental data.