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Climate Endgame: Exploring catastrophic climate change scenarios

Urheber*innen

Kemp,  Luke
External Organizations;

Xu,  Chi
External Organizations;

Depledge,  Joanna
External Organizations;

Ebi,  Kristie L.
External Organizations;

Gibbins,  Goodwin
External Organizations;

Kohler,  Timothy A.
External Organizations;

/persons/resource/johan.rockstrom

Rockström,  Johan
Potsdam Institute for Climate Impact Research;

Scheffer,  Marten
External Organizations;

/persons/resource/emdir

Schellnhuber,  Hans Joachim
Potsdam Institute for Climate Impact Research;

Steffen,  Will
External Organizations;

Lenton,  Timothy M.
External Organizations;

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Volltexte (frei zugänglich)

27913oa.pdf
(Verlagsversion), 2MB

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Zitation

Kemp, L., Xu, C., Depledge, J., Ebi, K. L., Gibbins, G., Kohler, T. A., Rockström, J., Scheffer, M., Schellnhuber, H. J., Steffen, W., Lenton, T. M. (2022): Climate Endgame: Exploring catastrophic climate change scenarios. - Proceedings of the National Academy of Sciences of the United States of America (PNAS), 119, 34, e2108146119.
https://doi.org/10.1073/pnas.2108146119


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_27913
Zusammenfassung
Prudent risk management requires consideration of bad-to-worst-case scenarios. Yet, for climate change, such potential futures are poorly understood. Could anthropogenic climate change result in worldwide societal collapse or even eventual human extinction? At present, this is a dangerously underexplored topic. Yet there are ample reasons to suspect that climate change could result in a global catastrophe. Analyzing the mechanisms for these extreme consequences could help galvanize action, improve resilience, and inform policy, including emergency responses. We outline current knowledge about the likelihood of extreme climate change, discuss why understanding bad-to-worst cases is vital, articulate reasons for concern about catastrophic outcomes, define key terms, and put forward a research agenda. The proposed agenda covers four main questions: 1) What is the potential for climate change to drive mass extinction events? 2) What are the mechanisms that could result in human mass mortality and morbidity? 3) What are human societies' vulnerabilities to climate-triggered risk cascades, such as from conflict, political instability, and systemic financial risk? 4) How can these multiple strands of evidence—together with other global dangers—be usefully synthesized into an “integrated catastrophe assessment”? It is time for the scientific community to grapple with the challenge of better understanding catastrophic climate change.