New research published in the September 17 issue of the journal Science sheds light on the evolution of Earths climate system by identifying changes in temperature, ocean circulation, and global carbon cycling associated with the rapid growth of Antarctic ice sheets approximately 14 million years ago.
View of East Antarctic Ice Sheet from Australias Mawson Station. Photo credit Katharine Burgdorff
Iceberg, Davis Sea, East Antarctica. Photo credit Robert Dunbar
By studying chemical changes in deep sea sediments, scientists at the University of California, Santa Barbara discovered that high-latitude Southern Ocean cooling helped to trigger this major expansion of Antarctic ice sheets, which have since become a permanent feature of the global climate system. These results document ice sheet history and supply crucial insight into the dynamics of the global climate system.
Scientists have long recognized that the Southern Ocean and the development of Antarctic ice sheets play a major role in the evolution of Earths present climate system. Only now have researchers been able to obtain a clearer picture of the relationship between high-latitude temperatures, global carbon cycling and the size of Antarctic ice sheets.
Gail Gallessich | EurekAlert!
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Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
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