"The global climate will warm up"

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and over the next twenty years we will have a more decisive global warming . This is indicated by a research published in Nature by a group of the University of Washington in Seattle (USA) coordinated by Ka-Kit Tung. The reason? The circulation of the South Atlantic, which carries hot water to the north and the cold to the south, is slowing down. The study shows that the weakening of this circulation, which consists of a system of currents that also includes that of the Gulf, is part of its natural cycle .

The circulation of the South Atlantic (Amoc) carries warm water in the Gulf of Mexico to the north, that is to say in Greenland, Iceland and the Sea of Norway; Here are the cool mbades of water becoming denser and deeper. At this moment the current makes a "somersault" changes direction and transports cold water to the tropics. According to Ticinoonline to observe its characteristics and speed, researchers used satellite images and data from the international Argo project, which uses floating buoys that collect data on temperature and temperature. salinity. It appeared that this system of currents is moving from its fast phase to its slowest phase and this has implications for global warming . In fact, when it is in its fastest phase, Amoc removes more CO2 from the atmosphere and accumulates it in depth, trapping it for very long periods of time – at least a thousand years.

"These data support a hypothesis recently put forward that the weakening of this circulation has implications for the sequestration of CO2 present in the atmosphere," notes the oceanographer Alessandro Crise of the National Institute of Oceanography and Experimental Geophysics (Ogs) of Trieste. "The Amoc – adds – turns hot waters into colder and denser waters, which absorb the Co2 and it goes deep It is estimated that about 50% of the CO2 absorbed by the oceans has been captured by the cooled waters of this mechanism, in its most vivid phase. "

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