Articles | Volume 17, issue 4
https://doi.org/10.5194/esd-17-1081-2026
https://doi.org/10.5194/esd-17-1081-2026
Research article
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13 Aug 2026
Research article | Highlight paper |  | 13 Aug 2026

Catalogue of strong nonlinear surprises in ocean, sea-ice, and atmospheric variables in CMIP6

Joran R. Angevaare and Sybren S. Drijfhout

Data sets

Catalogue-of-Strong-Nonlinear-Surprises-in-ocean-sea-ice-and-atmospheric-variables-in-CMIP6 J. R. Angevaare and Sybren S. Drijfhout https://doi.org/10.5281/zenodo.17867115

Model code and software

OptimESM Tools J. R. Angevaare https://doi.org/10.5281/zenodo.15275185

Video abstract

Catalogue of Strong Nonlinear Surprises in ocean, sea-ice, and atmospheric variables in CMIP6 Joran Angevaare and Sybren Drijfhout https://doi.org/10.5446/73654

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Editorial statement
This paper provides important insights on possible abrupt shifts and state transitions under future climate change. The comprehensive catalogue presented in the paper spans changes in multiple components of the Earth system. These can have major impacts on both the climate system and other dependent systems, from ecosystems to society and the economy. The paper also makes the case for the possibility of Strong Nonlinear Surprises happening earlier than previously anticipated.
Short summary
We present a first catalogue of abrupt changes/state transitions in ocean, sea-ice, and atmospheric variables in future Coupled Model Intercomparison Project Phase 6 climate scenarios. We find many models that show Arctic sea-ice disappearance, North Atlantic winter mixed-layer collapse and/or subsequent transition of the Atlantic Meridional Overturning Circulation to a weak state. We find more abrupt changes/state transitions than in previous work at lower global warming levels.
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