A few weeks ago, a study by Copenhagen University researchers Peter and Susanne Ditlevsen concluded that the Atlantic Meridional Overturning Circulation (AMOC) is likely to pass a tipping point already this century, most probably around mid-century. Given the catastrophic consequences of an AMOC breakdown, the study made quite a few headlines but also met some skepticism. Now that the dust has settled, here some thoughts on the criticisms that have been raised about this study. ...
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The study suggests that the Atlantic Meridional Overturning Circulation (AMOC) could reach a tipping point this century, potentially around mid-century. This has drawn both attention and skepticism. One argument is about the data used to describe AMOC changes. They rely on sea surface temperatures in a specific region, and various indicators seem to align with AMOC reconstructions. Another criticism is the assumption that AMOC behavior follows a quadratic curve near the tipping point. However, this assumption seems plausible based on historical models. Regardless of certainty, the focus is on minimizing risks by transitioning away from fossil fuels to prevent potential catastrophic consequences of an AMOC collapse.