Universität zu Köln

Wetterich, Sebastian, Tumskoy, Vladimir, Rudaya, Natalia ORCID: 0000-0003-1536-6470, Kuznetsov, Vladislav ORCID: 0000-0002-0544-6752, Maksimov, Fedor ORCID: 0000-0002-9429-3216, Opel, Thomas ORCID: 0000-0003-1315-8256, Meyer, Hanno ORCID: 0000-0003-4129-4706, Andreev, Andrei A. and Schirrmeister, Lutz ORCID: 0000-0001-9455-0596 (2016). Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic). Quat. Sci. Rev., 147. S. 298 - 312. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791

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Abstract

Ice Complex deposits (locally known as the Buchchagy Ice Complex) are exposed at both coasts of the East Siberian Dmitry Laptev Strait and preserved below the Yedoma Ice Complex that formed during MIS3 and MIS2 (Marine Isotope Stage) and lateglacial-Holocene thermokarst deposits (MIS1). Radioisotope disequilibria (Th-230/U) of peaty horizons date the Buchchagy Ice Complex deposition to 126 + 16/-13 kyr and 117 + 19/-14 kyr until 98 +/- 5 kyr and 89 +/- 5 kyr. The deposit is characterised by poorly sorted medium-to-coarse silts with cryogenic structures of horizontal ice bands, lens-like, and lens like reticulated segregation ice. Two peaty horizons within the Buchchagy Ice Complex and syngenetic ice wedges (2-4 m wide, up to 10 m high) are striking. The isotopic composition (delta O-18, delta D) of Buchchagy ice-wedge ice indicates winter conditions colder than during the MIS3 interstadial and warmer than during MIS2 stadial, and similar atmospheric winter moisture sources as during the MIS2 stadial. Buchchagy Ice Complex pollen spectra reveal tundra-steppe vegetation and harsher summer conditions than during the MIS3 interstadial and rather similar vegetation as during the MIS2 stadial. Short-term climatic variability during MIS5 is reflected in the record. Even though the regional chronostratigraphic relationship of the Buchchagy Ice Complex to the Last Interglacial remains unclear because numerical dating is widely lacking, the present study indicates permafrost (Ice Complex) formation during MIS5 sensu lato, and its preservation afterwards. Palaeoenvironmental insights into past climate and the periglacial landscape dynamics of arctic lowlands in eastern Siberia are deduced from the record. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wetterich, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Tumskoy, Vladimir UNSPECIFIED UNSPECIFIED UNSPECIFIED Rudaya, Natalia UNSPECIFIED orcid.org/0000-0003-1536-6470 UNSPECIFIED Kuznetsov, Vladislav UNSPECIFIED orcid.org/0000-0002-0544-6752 UNSPECIFIED Maksimov, Fedor UNSPECIFIED orcid.org/0000-0002-9429-3216 UNSPECIFIED Opel, Thomas UNSPECIFIED orcid.org/0000-0003-1315-8256 UNSPECIFIED Meyer, Hanno UNSPECIFIED orcid.org/0000-0003-4129-4706 UNSPECIFIED Andreev, Andrei A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schirrmeister, Lutz UNSPECIFIED orcid.org/0000-0001-9455-0596 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-265111
DOI:	10.1016/j.quascirev.2015.11.016
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	147
Page Range:	S. 298 - 312
Date:	2016
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0277-3791
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BOLSHOY LYAKHOVSKY ISLAND; LAKE ELGYGYTGYN; PALEOENVIRONMENTAL HISTORY; NORTHEAST SIBERIA; ISOTOPES; TH-230/U; CLIMATE; ARCHIPELAGO; CARBON; RECONSTRUCTION Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26511