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<p>The Atlantic Meridional Overturning Circulation (AMOC) is a crucial component of the global climate system, responsible for regulating heat distribution and carbon sequestration. The stability of the AMOC is a subject of intense scientific debate, with some studies suggesting an impending collapse due to anthropogenic climate change, while others argue for its resilience and stability based on different proxies. This study highlights how sea level differences, corrected for subsidence, provide a robust and simple proxy for AMOC stability. A comparison of tide gauge data from The Battery, New York, and Brest, France, corrected for land subsidence using GPS measurements, reveals a negligible difference in absolute sea level rise between these locations, reinforcing the stability of the AMOC within the period 1960 to 2024. These findings challenge claims of AMOC weakening and emphasize the necessity of accurate corrections for subsidence in sea level analyses. Future research should focus on refining observational methods and integrating multiple proxies to enhance the understanding of AMOC dynamics and its role in climate change.</p>

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Stability of the Atlantic meridional overturning circulation inferred by subsidence-corrected sea level change

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Alberto Boretti

摘要

The Atlantic Meridional Overturning Circulation (AMOC) is a crucial component of the global climate system, responsible for regulating heat distribution and carbon sequestration. The stability of the AMOC is a subject of intense scientific debate, with some studies suggesting an impending collapse due to anthropogenic climate change, while others argue for its resilience and stability based on different proxies. This study highlights how sea level differences, corrected for subsidence, provide a robust and simple proxy for AMOC stability. A comparison of tide gauge data from The Battery, New York, and Brest, France, corrected for land subsidence using GPS measurements, reveals a negligible difference in absolute sea level rise between these locations, reinforcing the stability of the AMOC within the period 1960 to 2024. These findings challenge claims of AMOC weakening and emphasize the necessity of accurate corrections for subsidence in sea level analyses. Future research should focus on refining observational methods and integrating multiple proxies to enhance the understanding of AMOC dynamics and its role in climate change.