Universität zu Köln

Cunningham, Laura, Vogel, Hendrik ORCID: 0000-0002-9902-8120, Nowaczyk, Norbert, Wennrich, Volker ORCID: 0000-0003-3617-1963, Juschus, Olaf, Persson, Per ORCID: 0000-0001-9172-3068 and Rosen, Peter (2013). Climatic variability during the last interglacial inferred from geochemical proxies in the Lake El'gygytgyn sediment record. Paleogeogr. Paleoclimatol. Paleoecol., 386. S. 408 - 415. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1872-616X

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Abstract

The Last Interglacial Period (LIP) is often regarded as a good analogue for potential climatic conditions under predicted global warming scenarios. Despite this, there is still debate over the nature, duration and frequency of climatic changes during this period. One particularly contentious issue has been the apparent evidence of climatic instability identified in many marine cores but seemingly lacking from many terrestrial archives, especially within the Arctic, a key region for global climate change research. In this paper, geochemical records from Lake El'gygytgyn, north-eastern Russia, are used to infer past climatic changes during the LIP from within the high Arctic. With a sampling resolution of similar to 20-similar to 90 years, these records offer the potential for detailed, high-resolution palaeoclimate reconstruction. This study shows that the LIP commenced in central Chukotka similar to 129 thousand years ago (ka), with the warmest climatic conditions occurring between similar to 128 and 127 ka before being interrupted by a short-lived cold reversal. Mild climatic conditions then persisted until similar to 122 ka when a marked reduction in the sedimentation rate suggests a decrease in precipitation. A further climatic deterioration at similar to 118 ka marks the return to glacial conditions. This study highlights the value of incorporating several geochemical proxies when inferring past climatic conditions, thus providing the potential to identify signals related to environmental change within the catchment. We also demonstrate the importance of considering how changes in sedimentation rate influence proxy records, in order to develop robust palaeoenvironmental reconstructions. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cunningham, Laura UNSPECIFIED UNSPECIFIED UNSPECIFIED Vogel, Hendrik UNSPECIFIED orcid.org/0000-0002-9902-8120 UNSPECIFIED Nowaczyk, Norbert UNSPECIFIED UNSPECIFIED UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED Juschus, Olaf UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, Per UNSPECIFIED orcid.org/0000-0001-9172-3068 UNSPECIFIED Rosen, Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-475912
DOI:	10.1016/j.palaeo.2013.06.009
Journal or Publication Title:	Paleogeogr. Paleoclimatol. Paleoecol.
Volume:	386
Page Range:	S. 408 - 415
Date:	2013
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1872-616X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CRATER LAKE; ICE-CORE; POLLEN RECORD; BAIKAL; RESOLUTION; VEGETATION; CHUKOTKA; DYNAMICS; EUROPE; AMPLIFICATION Multiple languages Geography, Physical; Geosciences, Multidisciplinary; Paleontology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47591