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Tunguska-1908 Explosion and Global Warming

Boris German(1)

(1) Institute of Physics of the Academy of Sciences, R. Luxemburg str., 72, 83114, Donetsk, Ukraine

Abstract

Although already 100 years had passed after the famous Tunguska event, the scientific community is still far from clear understanding of what happened in Siberia on 30 June 1908. For three nights following the explosion in the Tunguska area, skies in Asia and in Europe were exceptionally bright. According to a hypothesis by V.Shaidurov (2005), the Tunguska-1908 phenomenon caused global warming. It based on the assumption that explosion in Siberia initiated a growth of silvery (noctilucent) clouds in the Earth's mesosphere and considerably changed the thermoprotective properties of the atmosphere. In our report we strongly argue that after the explosion in Siberia a special activity of silvery clouds was not marked. And a loss of synchronism of a trend of temperatures in both hemispheres of the Earth was recorded only in the first decade after the Tunguska-1908 phenomenon. The similar changes of the trend of temperatures was not noted during all other 10-year-old periods after explosion. Therefore we assert that the amount and position of water vapour through the atmosphere during the 1908 Tunguska catastrophe could not be the crucial factor in global warming which is observed today. Current and past climate changes can not be attributed to single isolated events.