Differ with arctic, antarctic main body is held by the mainland, and be surrounded by ocean all round Antarctica, when because this is annual southern winter ends, the maritime space all round Antarctica can be enclothed by Hai Bing, limits can amount to left and right sides of kilometer of about 18 million square at most, double what these Hai Bing's areas near Chinese terrestrial area. But these large-scale sea ice show a few strange change occasionally, break can appearing among Hai Bing occasionally for instance is cruel even show sea area, this kind of phenomenon is called to put a lake on the ice (Polynya) .
Antarctica added the lake between the ice that appears in coastal waters ice in August 2016
The scientist is studying these features a few years all the time, after for instance the antarctic winter 2017 goes, scientists discovered in the Hai Bing all round antarctic giant the lake between ice. Come from bureau of American space navigation (NASA) Terra satellite is in the image that in Weideerhaidong the ministry acquired the lake between ice on September 25, 2017, it looks to resemble is Hai Bing was opened suddenly by stamp a cut. Showed the ocean with brunet lower part.
Autumn 2017, range of the lake between the ice of this one area is particularly big, from September the mushroom of 9500 square kilometer of the middle ten days of a month arrives the last ten-day of a month will make an appointment with 80000 square kilometer in October, this one side is accumulated almost the area with city of our country Chongqing is same. Scientists point out, since 1974, mixed 1975 since forming the lake between famous ice 1976, the lake between the ice 2017 is range is the biggest since having a record.
In the winter of Antarctica chill, how is the lake between ice formed, develop and be being maintained is the main problem that scientists study all the time, it often happens in early spring, sporadic in winter. Before this, the figure that the scholar points out these areas are marine brings about Weideer the ocean current of circumfluent drive takes Wen Shui deep-sea superstratum thereby Hai Bing melts. But this cannot explain why the lake between these ice can appear in specific time, some a particular year are done not have however.
And recent research points to strong cyclone wind, be in the marine area all round Antarctica, can appear occasionally a few powerful cyclone, they can be blown in the area all round Antarctica driving and large-scale fierce wind, phenomenon of this kind of unusual weather can become the trigger of the lake between ice. The scientist that cloth of A of new York university plunges into score school Diane Francis (Diana Francis) the explanation says, unusual storm can procrastinate with opposite way around storm center move floating Hai Bing, tear off a breach between ice in Hai Bing thereby, develop then become the lake between ice.
In the winter of a few special time, big compression ring sheds will much quantity of heat and moisture to move latitudinally from which to Antarctica, make large cyclone is formed on Hai Bing. For example, autumn 2016, after the cyclone of a small-sized brief life is formed and sweeping Hai Bing, the lake between miniature ice arises in Antarctica sea ice. Francis expresses, with compared 2016, movement of antarctic 2017 quantity of heat is more powerful, the result is Antarctica happened to be mixed oftener on Hai Bing more intense tornado, make the lake between the ice 2017 becomes bigger, held longer time.
Actually, ocean and atmospheric condition may produce effect jointly. Francis points out: "I thought to primary effect arrives since atmosphere condition. " " once this area does not have ice, marine motivation can give warmer water is brought near surface layer, organize what put on the ice newly to form, maintain the lake between ice inside longer time thereby. One part researcher thinks, the formation of this huge hole the reason returns likelihood and the whole world that create artificially to become warm climate change is concerned, won't be in otherwise tens of appear suddenly 2017 after year the lake between so tremendous ice.
