Anomalies of stratospheric NO2 content over Siberia related to the Arctic ozone hole 2011
V.Yu. Aheyeva1, M.V. Grishaev2, A.N. Gruzdev1, A.S. Elokhov1, N.S. Salnikova2
1A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Pyzhevsky 3, 119017, Moscow, Russia
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: nitrogen dioxide, ozone, ozone hole, anomalies
Abstract
At the end of winter and beginning of spring of 2011 significant negative anomalies of nitrogen dioxide were detected on the basis of results obtained from the ground-based spectrometric measurements of the stratospheric NO2 content in Tomsk (West Siberia) and Zhigansk (East Siberia). Negative anomalies of NO2 were observed in other years too, but in 2011 they were record. Negative anomalies of NO2 were accompanied by anomalies of total ozone content (TOC), temperatures, and heights of the isobaric surfaces in stratosphere. The analysis of the transport atmospheric trajectories and horizontal TOC distribution demonstrated that the stratospheric NO2 content decrease was caused by the transport of stratospheric air from low TOC area. Vertical NO2 profiles in Tomsk show that, most probably, some contribution to the negative anomalies in the early spring of 2011 brought by denitrification of the polar stratosphere in ozone hole area.
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