The polynya was first observed in the Weddell Sea in the 1970s and it has not reappeared after 40 years. Scientists have been studying about this phenomenon’s origins and researchers concluded that the last appearance of the polynya may be its last, because climate change is trapping warm water in beneath the ocean, preventing the formation of ice-free regions Analyzing data. from measurements made by robotic floats and ship that sail around the Antarctica for the last six decades, the researchers concluded that climate change affects the ocean’s salinity, trapping the warm waters below.

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