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Page dédiée :
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Le collapswashing, succédant au greenwashing, désigne non seulement la dissimulation des destructions environnementales mais dénonce également ceux qui font croire qu’ils préviennent les risques de déclin ou d’effondrement, alors qu’ils ne font que dissimuler ce qui décline ou s’effondre. Source : Vincent Mignerot
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Henk A. Dijkstra
26 février 2026
The Gulf Stream is part of the Atlantic Meridional Overturning Circulation (AMOC). The AMOC is a tipping element and may collapse under changing forcing. However, the role of the Gulf Stream in such a tipping event is unknown. Here, we investigate the link between the AMOC and Gulf Stream using a high-resolution (0. 1°) stand-alone ocean simulation, in which the AMOC collapses under a slowly-increasing freshwater forcing. AMOC weakening gradually shifts the Gulf Stream near Cape Hatteras northward, followed by an abrupt northward displacement of 219 km within 2 years. This rapid shift occurs a few decades before the simulated AMOC collapse. Satellite altimetry shows a significant (1993–2024, p < 0.05) northward Gulf Stream trend near Cape Hatteras, which is also confirmed in subsurface temperature observations (1965–2024, p < 0.01). These findings provide indirect evidence for present-day AMOC weakening and demonstrate that abrupt Gulf Stream shifts can serve as early warning indicator for AMOC tipping.
09 février 2024
Scientists now have a better understanding of the risks ahead and a new early warning signal to watch for.
