Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2013, Vol. 10, No. 1, pp. 153-163
Ionosphere response over East Siberia during the 2009 Sudden Stratosphere Warming derived from data of ground based and satellite radio sounding
B.G. Shpynev
1, D. Pancheva
2, P. Muchtarov
2, V.I. Kurkin
1, K.G. Ratovsky
1, M.A. Chernigovskaya
1, A.Yu. Belinskaya
3, A.E. Stepanov
41 Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia
2 National Institute of Geophysics, Geodesy and Geography BAN, Sofia, Bulgaria
3 Altay-Sayan Branch of Geophysical survey SB RAS, Novosibirsk, Russia
4 Institute of Cosmophysical Research and Aeronomy SB RAS, Yakutsk, Russia
The coupling of dynamical processes in the middle atmosphere and in the ionosphere over Siberia during Sudden Stratospheric Warming (SSW) on January 2009 is investigated in the paper. For middle atmosphere dynamics analysis the database of UK Met Office and MLS Aura data were used. Ionosphere dynamics was investigated by using COSMIC program data and data from Siberian ionosondes in Novosibirsk, Irkutsk, Norilsk and Yakutsk. The major SSW in January 2009 appears as one of most powerful events in the period of continuous Solar minimum in years 2005–2010. The driver of SSW was the global circulation energy, which released in the stratosphere when circumpolar vortex divided by two couples of cyclonic and anti-cyclonic vortexes. Maximal effect of SSW was observed on circulations borders with northward fluxes. Data of ionosondes network show SSW effects in the ionosphere and these effects depend on observational site positions relatively circulation zones. The major effect was observed in Yakutsk as increasing of ionization maximum height hmF2 up to ~50 km and decreasing the critical frequency foF2 during six days. In Novosibirsk and Irkutsk variations of hmF2 and foF2 showed inverse dynamics, which differed in night and day, but SSW effects were clearly visible. As mechanism of neutral atmosphere impact to the ionosphere we consider the uplifting/lowering molecular gas to/from lower thermosphere in active regions of circulations.
Keywords: верхняя и средняя атмосфера, ионосфера, взаимодействие слоев атмосферы, волновые возмущения, the upper and middle atmosphere, interaction between atmospheric layers, wave disturbances
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