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    Friday, October 13, 2017

    'mysterious' hole appears in Antarctica

    The researchers reported on this huge mysterious hole in the sea ice near Antarctica. The hole discovered a month ago is about 30,000 square miles or the size of Maine. Scientists say that this is the largest hole in the Weddell Sea since the 1970s.

    "In the depths of winter, more than a month, we had this area of ​​open water," said Kent Moore, professor of physics at the University of Toronto-Mississauga, National Geographic.

    For the second year in a row, scientists have seen such a large hole in the sea ice of Antarctica, although it is more than last year. This phenomenon is called "polynie", a region with constant open water, where one must reckon with fixed sea ice according to the National Snow and Ice Data Center.

    The hole was detected using a robotic swimmer that can operate under sea ice. In September, one of these swimmers appeared within the Polynya and provided unique data on its existence. Satellite images have confirmed their appearance. Moore worked with members of the project "Carbon and Observation of the Climate and Modeling of the Southern Ocean" to study the Polynya and its climatic influences.

    "It is wonderful that this wormwood has gone for 40 years and then has returned," said Moore.

    Without the insulating effect of the sea ice cover, the wormwood allows the atmosphere and the ocean to exchange heat, impulse and moisture, which leads to considerable effects on the climate. The study has not yet been published in a scientific journal reviewed by experts, since satellite images were only taken in September, according to a spokesman for the University of Thornton-Mississauga, Nicole Walk. However, the researchers present this work to the British journal Nature, she said.

    Scientists are not sure that this wormwood will mean the oceans and the climate of Antarctica and whether it is related to climate change, according to National Geographic.

    "We really do not understand the long-term consequences of this Polynya," Moore told the magazine.

    But from these new dimensions of the ocean, along with space surveys and climatic models, the secrets of the Polynya and their impact on the climate can finally be revealed. It took several years for the news to be published on the ice on the bottom of the world: one of the largest icebergs, estimated at 1 trillion. Ton, which was ever recorded, broke the ice shelf in the Antarctic in July. This week in the journal Geophysical Research Letters was discovered that the warming of the oceans strongly undermines the integrity of the important floating ice shelf in the West Antarctic, reported quartz.
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