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Atlantic Ocean Circulation System Could Collapse, Study Says | Voice Of America

One study suggests that a key environmental system that affects the way water circulates in the Atlantic Ocean and affects the climate could be on the brink of collapse due to the rapid melting of glaciers and sea ice. The study, published Tuesday in the scientific journal Proceedings of the United States National Academy of Sciences (PNAS), used a global ocean model to study the effects of melting ice on the South Atlantic Circulation ( AMOC), a large system of ocean currents that carry warm water from the tropics north to the North Atlantic. The system includes the Gulf Stream, off the east coast of the United States, which carries warm tropical water north and helps moderate temperatures in much of Europe, considering its high latitude. The current has come under intense scrutiny in recent years because cool, cool water from melting Greenland’s glaciers has essentially been causing the current to slow down, even if it doesn’t come to a complete stop. UN Chief Scientific Panel Calls for More Action to Prevent Global Warming UN Chief Scientific Panel Calls for More Action to Prevent Global Warming Researchers from the University of Copenhagen, who conducted the study, said their model indicates that the AMOC could achieve a ” tipping point “or, a crucial threshold, earlier than previously anticipated due to the rate at which glacial ice is melting. In an interview, one of the study’s authors, Johannes Lohmann, said that it had been predicted, based on previous climate models, that the AMOC could reach its tipping point when a certain level of fresh water flows into the North Atlantic from the thaw. in Greenland. He pointed out that those models were based on a very slow melting of the ice. Lohmann argued that, “Actually, the increases in meltwater from Greenland are accelerating and cannot be considered slow.” He said a faster rate could mean that the circulation system could be reached much earlier than previous predictions. Lohmann and other researchers say the research findings are inconclusive and more studies are needed. But he indicated that the possibility of a rapid AMOC collapse should be a warning to lawmakers. The expert noted that “due to the potentially increased risk of abrupt climate change in parts of the Earth system that we show in our research, it is important that lawmakers continue to push for ambitious short- and medium-term climate goals to slow the pace of climate change. , especially in vulnerable places like the Arctic. ”

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