Le courant océanique de l'Atlantique s'affaiblit depuis vingt ans, selon une étude

Un système majeur de courants de l'océan Atlantique qui régule le climat mondial ralentit depuis près de 20 ans. De nouvelles recherches fournissent des preuves directes de ce déclin sur une vaste zone de l'Atlantique Nord.

Des scientifiques de l'école Rosenstiel des sciences marines, atmosphériques et terrestres de l'université de Miami ont dirigé cette étude. Ils ont analysé les données provenant de quatre réseaux de surveillance installés sur les fonds marins, s'étendant des tropiques aux latitudes moyennes. Les instruments ont mesuré la pression, la température et les courants afin de suivre les flux océaniques profonds situés à plus de 1 000 mètres.

Articles connexes

New research shows that efforts to reduce air pollution in Europe, North America and East Asia could accelerate weakening of the Atlantic Meridional Overturning Circulation. The ocean current plays a key role in regulating Europe’s climate. Scientists used multiple climate models to assess the impact under continued high greenhouse gas emissions.

Rapporté par l'IA

A patch of cooling ocean south-east of Greenland, known as the cold blob, is likely caused by a slowdown in the Atlantic Meridional Overturning Circulation, according to new research. The findings add to concerns about potential future climate impacts in Europe and beyond. Scientists remain divided on the exact causes.

Scientists forecast an 80 percent likelihood that an El Niño will form by September, with most models pointing to a moderate event. Some simulations indicate the possibility of a much stronger episode. Global warming is expected to intensify the effects of any such occurrence.

Rapporté par l'IA

A team of Dutch scientists has presented simulations showing that a massive dam across the Bering Strait could help prevent the collapse of the Atlantic Meridional Overturning Circulation. The proposal was outlined at a major geoscience conference in Vienna this month.

Researchers have created the first global map showing how Earth's deepest mantle is deformed, primarily in regions where ancient subducted tectonic slabs reside. Using over 16 million seismograms, the team confirmed patterns predicted by geodynamic models. The findings, published in The Seismic Record, offer new insights into mantle flow near the core-mantle boundary.

Ce site utilise des cookies

Nous utilisons des cookies pour l'analyse afin d'améliorer notre site. Lisez notre politique de confidentialité pour plus d'informations.
Refuser