Nonuniform Late Pleistocene glacier fluctuations in tropical Eastern Africa

Groos, Alexander R.; Akçar, Naki; Yesilyurt, Serdar; Miehe, Georg; Vockenhuber, Christof; Veit, Heinz (2021). Nonuniform Late Pleistocene glacier fluctuations in tropical Eastern Africa. Science Advances, 7(11), eabb6826. American Association for the Advancement of Science 10.1126/sciadv.abb6826

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Today’s ice caps and glaciers in Africa are restricted to the highest peaks, but during the Pleistocene, several mountains on the continent were extensively glaciated. However, little is known about regional differences in the timing and extent of past glaciations and the impact of paleoclimatic changes on the afro-alpine environment and settlement history. Here, we present a glacial chronology for the Ethiopian Highlands in comparison with other East African Mountains. In the Ethiopian Highlands, glaciers reached their maximum 42 to 28 ka thousand years ago before the global Last Glacial Maximum. The local maximum was accompanied by a temperature depression of 4.4° to 6.0°C and a ~700-m downward shift of the afro-alpine vegetation belt, reshaping the human and natural habitats. The chronological comparison reveals that glaciers in Eastern Africa responded in a nonuniform way to past climatic changes, indicating a regionally varying influence of precipitation, temperature, and orography on paleoglacier dynamics.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleo-Geoecology
08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Exogenous Geology
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Groos, Alexander Raphael; Akçar, Naki and Veit, Heinz

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

2375-2548

Publisher:

American Association for the Advancement of Science

Funders:

[UNSPECIFIED] Swiss National Science Foundation ; [UNSPECIFIED] German Research Foundation

Language:

English

Submitter:

Alexander Raphael Groos

Date Deposited:

06 Apr 2021 16:38

Last Modified:

06 Apr 2021 16:48

Publisher DOI:

10.1126/sciadv.abb6826

BORIS DOI:

10.48350/153827

URI:

https://boris.unibe.ch/id/eprint/153827

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