Climatic response of extratropics to intense tropical eruptions
V.V. Zuev1,2, V.N. Krupchatnikov1,3, I.V. Borovko3,4
1Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences, 634055, Tomsk, 10/3, Academichesky ave.
2National Research Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk, 634050, Russia
3Siberian Regional Hydrometeorological Research Institute, Russia, 630099, Novosibirsk, Sovetskaya, 30
4Institute of Computational Mathematics and Mathematical Geophysics of the Siberian Branch of the RAS, 6, Ac. Lavrentieva ave., 630090, Novosibirsk, Russia
Keywords: вулканическое извержение, аэрозоль, стратосфера, температура, циркуляция, изменение климата, volcanic eruption, aerosol, stratosphere, temperature, circulation, climate change
Abstract
A substantial temperature rise regarding long-term rates is observed in the stratosphere due to intense tropical eruptions. The detected temperature anomalies account for volcanogenic aerosol absorption of short-wave solar radiation and outgoing longwave radiation. An intermediate complexity spectral model of general circulation was used to analyze the atmospheric circulation response to variations in transmission coefficients of short-wave radiation in the stratosphere after volcanic emissions of carbon aerosols which absorb the radiation. The results show considerable differences in the Northern and Southern hemisphere responses. Surface temperature anomalies in the southern polar region may be observed for 10 years following tropical volcanic eruptions.
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