1.6.1 Theory and methods of early warning signals

While tipping points are often abrupt, rapid and irreversible, and may come as a surprise after only modest and smooth changes beforehand, they are not always unpredictable. Given their potential for disruption, there have been numerous attempts to identify when a system may be losing resilience and approaching a tipping point. These approaches, often called EWS, rely on monitoring the changes in the underlying behaviour of these systems across time and/or space prior to a transition. While these indicators are well grounded in theory, there are limitations to consider when transferring them to real-world systems.

Here, we introduce the theory of critical slowing down (CSD) – the phenomenon that allows most of the EWS detailed here to be used. We then go into detail about the various methods used to predict the movement towards tipping points. These concepts are illustrated with real-world case studies from targeted climate and ecological systems. Finally, we explore some limitations of these methods, some potential solutions, and look ahead to potential future research in this field.

Bezos Earth Fund University of Exeter logo
Earth Commission Systems Change Lab logo Systemiq logo
Global Tipping Points logo
Share this content
Top