Universität zu Köln

Foerster, Verena, Junginger, Annett ORCID: 0000-0003-3486-0888, Langkamp, Oliver, Gebru, Tsige, Asrat, Asfawossen ORCID: 0000-0002-6312-8082, Umer, Mohammed, Lamb, Henry F., Wennrich, Volker ORCID: 0000-0003-3617-1963, Rethemeyer, Janet ORCID: 0000-0001-6698-4186, Nowaczyk, Norbert, Trauth, Martin H. and Schaebitz, Frank (2012). Climatic change recorded in the sediments of the Chew Bahir basin, southern Ethiopia, during the last 45,000 years. Quat. Int., 274. S. 25 - 38. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-4553

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Abstract

East African paleoenvironments are highly variable, marked by extreme fluctuations in moisture availability, which has far-reaching implications for the origin, evolution and dispersal of Homo sapiens in and beyond the region. This paper presents results from a pilot core from the Chew Bahir basin in southern Ethiopia that records the climatic history of the past 45 ka, with emphasis on the African Humid Period (AHP, similar to 15-5 ka calBP). Geochemical, physical and biological indicators show that Chew Bahir responded to climatic fluctuations on millennial to centennial timescales, and to the precessional cycle, since the Last Glacial Maximum. Potassium content of the sediment appears to be a reliable proxy for aridity, showing that Chew Bahir reacted to the insolation-controlled humidity increase of the AHP with a remarkably abrupt onset and a gradual termination, framing a sharply defined arid phase (similar to 12.8-11.6 ka calBP) corresponding to the Younger Dryas chronozone. The Chew Bahir record correlates well with low- and high-latitude paleoclimate records, demonstrating that the site responded to regional and global climate changes. (C) 2012 Elsevier Ltd and INQUA. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Foerster, Verena UNSPECIFIED UNSPECIFIED UNSPECIFIED Junginger, Annett UNSPECIFIED orcid.org/0000-0003-3486-0888 UNSPECIFIED Langkamp, Oliver UNSPECIFIED UNSPECIFIED UNSPECIFIED Gebru, Tsige UNSPECIFIED UNSPECIFIED UNSPECIFIED Asrat, Asfawossen UNSPECIFIED orcid.org/0000-0002-6312-8082 UNSPECIFIED Umer, Mohammed UNSPECIFIED UNSPECIFIED UNSPECIFIED Lamb, Henry F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED Rethemeyer, Janet UNSPECIFIED orcid.org/0000-0001-6698-4186 UNSPECIFIED Nowaczyk, Norbert UNSPECIFIED UNSPECIFIED UNSPECIFIED Trauth, Martin H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaebitz, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-482611
DOI:	10.1016/j.quaint.2012.06.028
Journal or Publication Title:	Quat. Int.
Volume:	274
Page Range:	S. 25 - 38
Date:	2012
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-4553
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EL-NINO/SOUTHERN-OSCILLATION; PLEISTOCENE HOMO-SAPIENS; AFRICAN RIFT LAKE; HIGH-RESOLUTION; ASIAN MONSOON; MELANOIDES-TUBERCULATA; NORTHERN AFRICA; MODERN HUMANS; MIDDLE AWASH; RAINY-SEASON Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48261