Mystery hole found in Antarctica's ice cover as big as West Bengal

Mystery hole found in Antarctica's ice cover as big as West Bengal

Mystery hole found in Antarctica's ice cover as big as West Bengal

Under certain circumstances, that warmer water can break through the insulating cooler water and melt the ice-a phenomena that happens regularly around coastal areas in both the Arctic and Antarctic, but normally not in the middle of the sea.

The researcher Kent Moore told to Motherboard that this is now the second year it is opened after 40 years, they are still trying to figuring out what's going on.

As the researchers are saying that it would be too soon to relate this hole with the climate change, therefore, the scientists are just researching and analysing the data to find out the real reason which caused the formation of this massive hole.

"Why was the Weddell polynya present in the 1970s, and then absent until its recent reappearance?"

Climate models predicted the polynya, but it was looked at as a glitch and not a true possibility until it reappeared after decades, Newsweek reported. It would not be noticeable without satellite imagery.

This new polynya appeared around September 9 and is hundreds of kilometers from the coast. At this time of year, the region is usually covered with thick layer of sea ice.

It's larger than The Netherlands, and almost the size of Lake Superior. Dr. Mojib Latif, head of the Research Division at GEOMAR, told the site. According to NASA, that sinking water contributes to the cold water mass, known as Antarctic Bottom Water, which feeds into deep ocean currents and contributes to ocean circulation around the globe.

"This is like opening a pressure relief valve-the ocean then releases a surplus of heat to the atmosphere for several consecutive winters until the heat reservoir is exhausted", Lati added. Many consider this to be a polynya that suffers a change of state, rather than temperature. Experts believe that the Weddell polynya might a part of some cyclical process but they lack clear details. This is quite possible given the fact that the deep water is saltier as well as warmer than the layer of water at the top. Also, despite being exposed to freezing chilly winds during the last month, this polynya has continued to persist, which means whatever force caused the hole to form is strong enough to keep it from refreezing.

But, with new observations using technology far more advanced than that available when it first appeared 40 years ago, they're hoping to uncover some answers. "We don't really understand the long-term impacts this polynya will have".

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