Early warning signals of the termination of the African Humid Period(s)

Trauth, Martin H.; Asrat, Asfawossen; Fischer, Markus L.; Hopcroft, Peter O.; Foerster, Verena; Kaboth-Bahr, Stefanie; Kindermann, Karin; Lamb, Henry F.; Marwan, Norbert; Maslin, Mark A.; Schaebitz, Frank; Valdes, Paul J.

doi:10.1038/s41467-024-47921-1

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Early warning signals of the termination of the African Humid Period(s)

Urheber*innen

Trauth, Martin H.
External Organizations;

Asrat, Asfawossen
External Organizations;

Fischer, Markus L.
External Organizations;

Hopcroft, Peter O.
External Organizations;

Foerster, Verena
External Organizations;

Kaboth-Bahr, Stefanie
External Organizations;

Kindermann, Karin
External Organizations;

Lamb, Henry F.
External Organizations;

/persons/resource/Marwan

Marwan, Norbert
Potsdam Institute for Climate Impact Research;

Maslin, Mark A.
External Organizations;

Schaebitz, Frank
External Organizations;

Valdes, Paul J.
External Organizations;

Externe Ressourcen

https://doi.org/10.5281/zenodo.10624471
(Ergänzendes Material)

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Trauth_s41467-024-47921-1.pdf
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Zitation

Trauth, M. H., Asrat, A., Fischer, M. L., Hopcroft, P. O., Foerster, V., Kaboth-Bahr, S., Kindermann, K., Lamb, H. F., Marwan, N., Maslin, M. A., Schaebitz, F., Valdes, P. J. (2024): Early warning signals of the termination of the African Humid Period(s). - Nature Communications, 15, 3697.
https://doi.org/10.1038/s41467-024-47921-1

Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_30041

Zusammenfassung

The transition from a humid green Sahara to today’s hyperarid conditions in northern Africa ~5.5 thousand years ago shows the dramatic environmental change to which human societies were exposed and had to adapt to. In this work, we show that in the 620,000-year environmental record from the Chew Bahir basin in the southern Ethiopian Rift, with its decadal resolution, this one thousand year long transition is particularly well documented, along with 20–80 year long droughts, recurring every ~160 years, as possible early warnings. Together with events of extreme wetness at the end of the transition, these droughts form a pronounced climate “flickering”, which can be simulated in climate models and is also present in earlier climate transitions in the Chew Bahir environmental record, indicating that transitions with flickering are characteristic of this region.