Scientists have found a link between climate changes in the Arctic and Antarctic

An international scientific expedition to Chukotka, which included researchers in Russia, the U.S. and Germany, came to the conclusion that between climate hemisphere there is a more intimate relationship than previously thought, according to RIA Novosti, the representative of the Presidium of the Far Eastern Branch of the Russian Academy of Sciences.
     
Joint expedition of scientists held in Chukotka in 2009. For climate experts gathered in the ancient rock samples of bottom sediments of Lake El'gygytgyn formed 3.6 million years ago with the fall of the meteorite. For three years, scientists Biologopochvennogo and Far East Geological Institute, and other institutions of the samples studied, followed by the conclusions of the close relationship climate of the Northern and Southern Hemispheres.
     
"These core (rock samples) of the lake El'gygytgyn reflect climate change and the Arctic environment with great sensitivity. Physical, chemical and biological parameters studied sediments meet previously identified global climate change to the corresponding glacial / interglacial periods," — told the agency.
     
"The findings of the expedition indicate that high temperature and rainfall in the warmer periods of" higher order "can not be explained only by the orbital parameters of the Earth or the atmosphere with greenhouse gases, which is usually attributed to the nature of glacial and interglacial periods. Assumed that there was additional feedback climate" — said the source.
     
He explained that by the scientists, the trigger for intense warming could be in Antarctica. According to studies, there were recurring intervals, during which the Western Antarctic ice sheet melted. These data suggest that some of these events coincide with periods of warming in the Arctic.
     
"Scientists have two scenarios to explain the close relationship climate of the Northern and Southern Hemispheres. Firstly, the reduction and disappearance of ice sheets on the Antarctic ice shelf could limit the formation of cold bottom water flowing in the North Pacific and rising to the surface. This leads to warmer surface water, higher temperatures and increased precipitation on the adjacent land, "- said
     
According to the second version, the disintegration of the West Antarctic ice sheet, probably led to a significant rise in global sea level and let the warmer surface water to penetrate into the Arctic Ocean through the Bering Strait.
     
"Our findings have global significance, given the facts of the ongoing destruction of the ice around the Antarctic Peninsula and the western edge of the Antarctic ice sheet and the potential acceleration of the process in the near future — in this respect, the past may be the key to the future," — said the representative of the Bureau.Source: inline.ru.

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