Universität zu Köln

Duesing, Walter, Kaboth-Bahr, Stefanie ORCID: 0000-0002-4449-2938, Asrat, Asfawossen, Cohen, Andrew S., Foerster, Verena ORCID: 0000-0002-3480-5769, Lamb, Henry F., Schaebitz, Frank ORCID: 0000-0003-3879-9308, Trauth, Martin H. and Viehberg, Finn (2021). Changes in the cyclicity and variability of the eastern African paleoclimate over the last 620 kyrs. Quat. Sci. Rev., 273. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-457X

Full text not available from this repository.

Abstract

There is ongoing debate concerning whether or not changes in the eastern African climate, both longterm and short-term, affected the evolution, dispersal, cultural development, and technological innovations of Homo sapiens - and if so, in what way. We present the wavelet spectral analysis results of a similar to 620 kyr record of environmental change from the Chew Bahir (CHB) basin in the southern Ethiopian rift, approximately 120 km from the Omo-Kibish fossil locality, which boasts one of the oldest documented appearances of H. sapiens. Our results indicate that the long-term wet-dry changes in the eastern African climate recorded in the CHB sediments were mainly caused by changes in orbital eccentricity, with relatively dry but variable climates occurring during eccentricity minima within the 400 kyr eccentricity cycle, and increased precipitation, interspersed with distinctly dryer phases associated with orbital precession, during eccentricity maxima. Such insolation-forced precipitation changes would have affected the habitat of H. sapiens in the region; the transition from Acheulean to Middle Stone Age (MSA) documented in the Olorgesailie Basin of southern Kenya coincides with a distinct eccentricity minimum with reduced precipitation and repeated abrupt climatic transitions. In contrast, at the time of the subsequent, first documented occurrence of H. sapiens in eastern Africa the climate was distinctly wetter and less variable. (C) 2021 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Duesing, Walter UNSPECIFIED UNSPECIFIED UNSPECIFIED Kaboth-Bahr, Stefanie UNSPECIFIED orcid.org/0000-0002-4449-2938 UNSPECIFIED Asrat, Asfawossen UNSPECIFIED UNSPECIFIED UNSPECIFIED Cohen, Andrew S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Foerster, Verena UNSPECIFIED orcid.org/0000-0002-3480-5769 UNSPECIFIED Lamb, Henry F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaebitz, Frank UNSPECIFIED orcid.org/0000-0003-3879-9308 UNSPECIFIED Trauth, Martin H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Viehberg, Finn UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-596834
DOI:	10.1016/j.quascirev.2021.107219
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	273
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-457X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CLIMATE-CHANGE; HIGH-LATITUDE; INSOLATION; MANGANESE; SENSITIVITY; VEGETATION; EVOLUTION; MONSOON; RECORDS; SYSTEM Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59683