Earth Sciences

Fast recovery of North Atlantic sea level in response to atmospheric carbon dioxide removal

S. Wang, Y. Shin, et al.

This study unveils crucial insights into the reversibility of sea level rise in the Subpolar North Atlantic amidst carbon dioxide removal strategies. Conducted by Sunhee Wang and colleagues, the research reveals how changes in the Atlantic Meridional Overturning Circulation can lead to rapid sea level declines, shedding light on the impacts of climate mitigation efforts on coastal resilience.

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~3 min • Beginner • English

Index

Abstract

Sea level rise due to anthropogenic warming threatens coastal environments and human societies, but its regional reversibility under successful climate mitigation efforts remains unclear. Using idealized atmospheric CO₂ ramp-up and ramp-down experiments, the study investigates Subpolar North Atlantic (SPNA) sea level fluctuations. During ramp-up, the SPNA experiences sea level rise faster than the global mean; during ramp-down, it exhibits a more rapid sea level decline over several decades. These fluctuations are mainly driven by the Atlantic Meridional Overturning Circulation (AMOC) response to CO₂ forcing. Enhanced meridional salinity transport associated with rapid AMOC recovery plays a crucial role in regional sea level decline. The results highlight potential pronounced sea level changes in the SPNA and surrounding coasts under climate mitigation scenarios.

Publisher

Communications Earth & Environment

Published On

Nov 03, 2024

Authors

Sunhee Wang, Yechul Shin, Ji-Hoon Oh, Jong-Seong Kug

DOI

https://doi.org/https://doi.org/10.1038/s43247-024-01835-4

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