Universität zu Köln

Zhao, W. W., Andreev, A. A., Wennrich, V., Tarasov, P. E., Anderson, P., Lozhkin, A. V. and Melles, M. (2015). The Reunion Subchron vegetation and climate history of the northeastern Russian Arctic inferred from the Lake El'gygytgyn pollen record. Paleogeogr. Paleoclimatol. Paleoecol., 436. S. 167 - 178. AMSTERDAM: ELSEVIER. ISSN 1872-616X

Full text not available from this repository.

Abstract

The 318-m-thick sediment record from Lake El'gygytgyn provides unique opportunities for a detailed examination of environmental changes during the Reunion Subchron polarity reversal event (2.1384-2.1216 Myr BP) in the northeastern Russian Arctic. The paper describes vegetation and climate fluctuations between similar to 2(.)15 and 2.10 Myr BP as inferred from palynological data. Biome reconstructions indicate that throughout this interval the tundra (TUND) biome generally has higher affinity scores as compared to cold steppe (STEP) or cold deciduous forest (CLDE). An exception is the climatic optimum between similar to 2.139 and 2.131 Myr BP, coinciding with Marine Isotope Stage 81 (approximately the Reunion Subchron), when the CLDE biome has the highest scores. Landscape-openness indices suggest that more closed vegetation characterized most of the interval between 2.146 and 2.127 Myr BP, when deciduous forest and shrubs expanded in the regional vegetation and climate was relatively warm and wet. Peaks in green algal colonies (Botryococcus) and Zygnema-type spores similar to 2.150-2.146, similar to 2.131-2.123, and similar to 2.112-2.102 Myr BP indicate expansions of shallow-water habitats and lowered lake levels. Comparisons with biome reconstructions from other interglacial intervals at Lake El'gygytgyn suggest that precession-related summer insolation intensity and obliquity-related duration of summer daylight are major controls on the onset of interglaciations, whereas obliquity probably plays a more significant role on vegetation succession at northern high latitudes during the Pleistocene. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhao, W. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andreev, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wennrich, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tarasov, P. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Anderson, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lozhkin, A. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Melles, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-389792
DOI:	10.1016/j.palaeo.2015.06.047
Journal or Publication Title:	Paleogeogr. Paleoclimatol. Paleoecol.
Volume:	436
Page Range:	S. 167 - 178
Date:	2015
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1872-616X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EARLY PLEISTOCENE; MEDITERRANEAN REGION; ICE VOLUME; LAST; SEDIMENTS; CHUKOTKA; AGE; AMPLIFICATION; INSOLATION; BAIKAL Multiple languages Geography, Physical; Geosciences, Multidisciplinary; Paleontology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38979