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In this episode of podcast I have talked about Antarctica. I have talked about its physical geography and its history and at last little bit about its facts.
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\\xa0Modern plate boundaries may be far different from ancient ones presumably marked by old fold belts. Ancient Antarctic mobile belts, such as are followed by today\\u2019s Transantarctic Mountains, terminate at continental margins abruptly, as if sliced off, and seemingly reappear in other lands across young ocean basins. Much research has been concentrated on attempting to match intercontinentally the detailed structure of opposed coasts, such as between Antarctica and Australia, in an effort to learn whether they had been actually connected before the latest cycle of crustal spreading from intervening mid-oceanic ridges. Similarities between ancient mobile belts now suggest to some geologists that Antarctica may even have been connected to southwestern North America more than 600 million years ago, in late Precambrian time.\\xa0
Surface temperature trends show significant warming across the Antarctic Peninsula and to a lesser extent West Antarctica since the early 1950s, with little change across the rest of the continent. The largest warming trends occur on the western and northern parts of the Antarctic Peninsula. There the Faraday/Vernadsky Station has experienced the largest statistically significant (<5% level) trend of +0.53\\xb0 C per decade for the period 1951 -2006. The 100-year record from Orcadas on Laurie Island, South Orkney Islands, shows a warming of +0.20\\xb0C per decade. The western Peninsula warming has been largest during the winter, with winter temperatures at Faraday/Vernadsky increasing by +1.03\\xb0C per decade from 1950 - 2006. There is a high correlation during the winter between sea ice extent and surface temperatures, suggesting more sea ice during the 1950s - 1960s and reduction since then. This warming may reflect natural variability.
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