Summary:
Four of the most critical components of the Earth’s climate system are showing clear signs of destabilization, according to a study published in Nature Geoscience. Using observation-based data, an international team of scientists has detected early warning signals in the Greenland Ice Sheet, the Atlantic Meridional Overturning Circulation (AMOC), the Amazon rainforest, and the South American monsoon system.
The researchers developed a mathematical method to assess how these systems recover from disturbances, revealing ongoing stability loss. They stress that while exact tipping points remain uncertain, the risk increases with every tenth of a degree of additional warming. The study highlights the need for both immediate emission reductions and a global monitoring system using satellites to track key Earth system components.
Dependence of tipping points in the global system – Four central climate components are losing stability
The researchers succeeded in highlighting the warning signals for destabilization of the Greenland Ice Sheet, the Atlantic Meridional Overturning Circulation (AMOC), the Amazon rainforest, and the South American monsoon system.
“We now have convincing observational evidence that several interconnected parts of the Earth system are destabilizing,” says lead author Prof. Niklas Boers from the Technical University of Munich (TUM) and the Potsdam Institute for Climate Impact Research. “This means that these systems may be approaching critical thresholds that, if crossed, could trigger abrupt and irreversible changes with severe consequences,” adds Prof. Tim Lenton from the University of Exeter.
The researchers’ major concern is that these climate systems are not isolated. The systems interact with each other via the oceans and the atmosphere, which can lead to interactions and feedbacks. In the worst-case scenario, this destabilizes them and intensifies the negative consequences for the global climate system. At the same time, these effects could mask genuine warning signals and make tipping points even more difficult to predict.
“Unlike previous studies that focus on individual Earth system components, this new research zooms out to analyze them together as part of a larger, interconnected system,” adds co-author Dr. Teng Liu, also from TUM.
Analysis using a mathematical method
While current climate models are not yet able to simulate these complex dynamics reliably, empirical data offers an important way to monitor changes already underway. To identify and track signs of destabilization, the researchers developed a mathematical method that analyzes how systems recover from disturbances. Applying this method to empirical data reveals the ongoing stability loss in key Earth system components.
“While the exact thresholds at which tipping points may be crossed remain highly uncertain, the evidence clearly points toward increasing risk as temperatures rise. With every tenth of a degree of additional warming, the likelihood of crossing a tipping point grows. That alone should be a powerful argument for immediate and decisive reduction of greenhouse gas emissions,” emphasizes Prof. Niklas Boers.
Global monitoring system required
In addition to reducing emissions, the researchers are calling for the development of a global monitoring system to track the stability of major Earth system components. Satellite-based observations, particularly of vegetation and ice melt, will play a central role. This study not only underscores the urgency of building such a system, it also provides the methodological framework to support it.
Journal Reference:
Boers, N., Liu, T., Bathiany, S. et al., ‘Destabilization of Earth system tipping elements’, Nature Geoscience (2025). DOI: 10.1038/s41561-025-01787-0
Article Source:
Press Release/Material by Technical University of Munich (TUM)
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