Signatures consistent with multifrequency tipping in the Atlantic meridional overturning circulation
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Date
2020-11-25
Authors
Keane, Andrew
Krauskopf, Bernd
Lenton, Timothy M.
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American Physical Society
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Abstract
The early detection of tipping points, which describe a rapid departure from a stable state, is an important theoretical and practical challenge. Tipping points are most commonly associated with the disappearance of steady-state or periodic solutions at fold bifurcations. We discuss here multifrequency tipping (𝑀 tipping), which is tipping due to the disappearance of an attracting torus. 𝑀 tipping is a generic phenomenon in systems with at least two intrinsic or external frequencies that can interact and, hence, is relevant to a wide variety of systems of interest. We show that the more complicated sequence of bifurcations involved in 𝑀 tipping provides a possible consistent explanation for as yet unexplained behavior observed near tipping in climate models for the Atlantic meridional overturning circulation. More generally, this Letter provides a path toward identifying possible early warning signs of tipping in multiple-frequency systems.
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Keywords
Tipping points , Multifrequency tipping (𝑀 tipping) , Atlantic meridional overturning circulation , Climate models
Citation
Keane, A., Krauskopf, B. and Lenton, T. M. (2020) 'Signatures consistent with multifrequency tipping in the Atlantic meridional overturning circulation', Physical Review Letters, 125(22), 228701 (5pp). https://doi.org/10.1103/PhysRevLett.125.228701
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© 2020, American Physical Society.