Title: Studying Manifestations of 2008-2011 Sudden Stratospheric Warmings in East-Siberia and European Russia
Abstract: This paper presents a study of variations in atmospheric temperature at the mesopause and lower thermosphere (MLT) heights on the mid-latitudes in different longitudinal sectors during the 2008-2011 sudden stratospheric warming events. The research has been made on the data of ground-based and sat- ellite temperature measurements. We analyzed variations of upper mesosphere temperature at ~87 km inferred from OH (6,2) airglow observations at two mid-latitude observation points: the ISTP Geophysi- cal Observatory (Еast Siberian region, 52°N, 103°E) and the Zvenigorod Station (European region, 56°N, 37°E). Satellite data on atmospheric temperature vertical profiles obtained by the EOS Aura Mi- crowave Limb Sounder (MLS) were involved. We conducted a regression and correlation analysis of the day-to-day stratosphere and mesopause temperatures during the SSW events. The SSW manifestations were revealed to influence on the mesopause region in the East Asian longitude zone in a more complex way than in the European one. In the European longitudinal zone the mesopause temperature decreased almost simultaneously with the stratospheric temperature rise; in all these SSW events, when the stratospheric temperature increased by ~ 30 K, the temperature in the mesopause decreased by ~ 20 K. In East Asia, there was no stable trend in the mesopause temperature response to the SSW. These results may exhibit an SSW possible longitudinal effect on the thermal and dynamic regimes of the middle and upper atmosphere.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 9
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