Schaebitz, Frank, Asrat, Asfawossen, Lamb, Henry F., Cohen, Andrew S., Foerster, Verena, Duesing, Walter, Kaboth-Bahr, Stefanie ORCID: 0000-0002-4449-2938, Opitz, Stephan, Viehberg, Finn A., Vogelsang, Ralf, Dean, Jonathan, Leng, Melanie J., Junginger, Annett ORCID: 0000-0003-3486-0888, Ramsey, Christopher Bronk, Chapot, Melissa S., Deino, Alan, Lane, Christine S., Roberts, Helen M., Vidal, Celine, Tiedemann, Ralph and Trauth, Martin H. (2021). Hydroclimate changes in eastern Africa over the past 200,000 years may have influenced early human dispersal. Commun. Earth Environ., 2 (1). LONDON: SPRINGERNATURE. ISSN 2662-4435

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Abstract

A drying trend in East Africa between 200,000 and 60,000 year ago was followed by cycles of high millennial to centennial climate variability, and may have influenced the dispersal of human populations, suggests a multi-proxy palaeoclimate record from Chew Bahir, Ethiopia. Reconstructions of climatic and environmental conditions can contribute to current debates about the factors that influenced early human dispersal within and beyond Africa. Here we analyse a 200,000-year multi-proxy paleoclimate record from Chew Bahir, a tectonic lake basin in the southern Ethiopian rift. Our record reveals two modes of climate change, both associated temporally and regionally with a specific type of human behavior. The first is a long-term trend towards greater aridity between 200,000 and 60,000 years ago, modulated by precession-driven wet-dry cycles. Here, more favorable wetter environmental conditions may have facilitated long-range human expansion into new territory, while less favorable dry periods may have led to spatial constriction and isolation of local human populations. The second mode of climate change observed since 60,000 years ago mimics millennial to centennial-scale Dansgaard-Oeschger cycles and Heinrich events. We hypothesize that human populations may have responded to these shorter climate fluctuations with local dispersal between montane and lowland habitats.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Schaebitz, FrankUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Asrat, AsfawossenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lamb, Henry F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cohen, Andrew S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Foerster, VerenaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duesing, WalterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaboth-Bahr, StefanieUNSPECIFIEDorcid.org/0000-0002-4449-2938UNSPECIFIED
Opitz, StephanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Viehberg, Finn A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vogelsang, RalfUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dean, JonathanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leng, Melanie J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Junginger, AnnettUNSPECIFIEDorcid.org/0000-0003-3486-0888UNSPECIFIED
Ramsey, Christopher BronkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chapot, Melissa S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deino, AlanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lane, Christine S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Roberts, Helen M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vidal, CelineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tiedemann, RalphUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trauth, Martin H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-603701
DOI: 10.1038/s43247-021-00195-7
Journal or Publication Title: Commun. Earth Environ.
Volume: 2
Number: 1
Date: 2021
Publisher: SPRINGERNATURE
Place of Publication: LONDON
ISSN: 2662-4435
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SOUTHERN ETHIOPIA; CLIMATE; AGE; MOUNTAINS; CONTEXT; RECORDS; SERIES; BASIN; LAKEMultiple languages
Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60370

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