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Different AMOC Stabilization between Past Interglacials and Future by Wei Liu

eli
Louvain-la-Neuve
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The excess freshwater in the Arctic due to global warming is causing a weakening of the Atlantic Meridional Overturning Circulation (AMOC). The question of how climate change will impact the stability of the AMOC, however, remains unclear. We address this uncertainty through a series of ensemble simulations (100 members) using freshwater hysteresis experiments, aiming to elucidate potential changes in AMOC stability across different interglacials. Our findings suggest that future increases in anthropogenic CO2 emissions will bolster the AMOC's resistance to excess freshwater, though it exhibits less resilience compared to past interglacials. In future climate scenarios, warmer conditions lead to a notable delay in sea ice expansion, which aids in preserving deep water formation and AMOC strength. Concurrently, an intensification of freshwater convergence in the North Atlantic acts as a dampening factor during AMOC recovery under warmer climate background.

  • Mardi, 14 novembre 2023, 08h00
    Mardi, 14 novembre 2023, 17h00