Lessons on Climate Sensitivity From Past Climate Changes

Anna S. von der Heydt*, Henk A. Dijkstra, Roderik S.W. van de Wal, Rodrigo Caballero, Michel Crucifix, Gavin L. Foster, Matthew Huber, Peter Köhler, Eelco Rohling, Paul J. Valdes, Peter Ashwin, Sebastian Bathiany, Tijn Berends, Loes G.J. van Bree, Peter Ditlevsen, Michael Ghil, Alan M. Haywood, Joel Katzav, Gerrit Lohmann, Johannes LohmannValerio Lucarini, Alice Marzocchi, Heiko Pälike, Itzel Ruvalcaba Baroni, Dirk Simon, Appy Sluijs, Lennert B. Stap, Alexis Tantet, Jan Viebahn, Martin Ziegler

*Corresponding author for this work

    Research output: Contribution to journalReview articlepeer-review

    42 Citations (Scopus)

    Abstract

    Over the last decade, our understanding of climate sensitivity has improved considerably. The climate system shows variability on many timescales, is subject to non-stationary forcing and it is most likely out of equilibrium with the changes in the radiative forcing. Slow and fast feedbacks complicate the interpretation of geological records as feedback strengths vary over time. In the geological past, the forcing timescales were different than at present, suggesting that the response may have behaved differently. Do these insights constrain the climate sensitivity relevant for the present day? In this paper, we review the progress made in theoretical understanding of climate sensitivity and on the estimation of climate sensitivity from proxy records. Particular focus lies on the background state dependence of feedback processes and on the impact of tipping points on the climate system. We suggest how to further use palaeo data to advance our understanding of the currently ongoing climate change.

    Original languageEnglish
    Pages (from-to)148-158
    Number of pages11
    JournalCurrent Climate Change Reports
    Volume2
    Issue number4
    DOIs
    Publication statusPublished - 1 Dec 2016

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