globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2015.11.016
Scopus记录号: 2-s2.0-84989836110
论文题名:
Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic)
作者: Wetterich S.; Tumskoy V.; Rudaya N.; Kuznetsov V.; Maksimov F.; Opel T.; Meyer H.; Andreev A.A.; Schirrmeister L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 147
起始页码: 298
结束页码: 311
语种: 英语
英文关键词: 230Th/U dating ; Beringia ; Bol'shoy Lyakhovsky Island ; Cryostratigraphy ; Marine Isotope Stage 5 ; Oyogos Yar ; Palaeoenvironments ; Permafrost
Scopus关键词: Deposits ; Glacial geology ; Isotopes ; Permafrost ; Vegetation ; <sup>230</sup>Th/U dating ; Beringia ; Bol'shoy Lyakhovsky Island ; Cryostratigraphy ; Marine isotope stages ; Oyogos Yar ; Palaeoenvironments ; Ice
英文摘要: 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 (230Th/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 (δ18O, δD) 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. © 2015 Elsevier Ltd
资助项目: The study was conducted under the auspices of the joint Russian-German projects Polygons in tundra wetlands: State and dynamics under climate variability in polar regions (POLYGON, RFBR grant № 11-04-91332-NNIO-a, DFG grant № HE 3622-16-1), Carbon in Permafrost (CarboPerm, BMBF grant № 03G0836B) and the Arctic Ecological Network (Arc-EcoNet, BMBF grant № 01DJ14003). Additional funding was provided by the Russian Federation Government to VT (grant № 2013-220-04-157) and NR (project of the Altai State University grant № 2013-220-04-129). The work of NR was furthermore supported by the Russian Science Foundation (RSF grant № 14-50-00036). The work of NR and AA in this study was performed according to the Russian Government Program of Competitive Growth of the Kazan Federal University. The work of VK and FM was supported by the RFBR (grant № 13-05-00854) and a project of the St. Petersburg State University (grant № 18.37.141.2014). The study contributes to the Eurasian Arctic Ice 4k project of TO (DFG grant № OP 217/2-1). We thank our colleagues who helped during fieldwork in 2007, especially Dmitry Dobrynin from Moscow State University. We are grateful to Dmitry Mel'nichenko and colleagues from the Hydrobase Tiksi, and Waldemar Schneider from AWI Potsdam who greatly supported the logistics of this expedition, and also to the team of Fedor Selyakhov from the Lena Delta Reserve who hosted our field camp at the Zimov'e River mouth in July 2007. The analytical work in the AWI laboratories was expertly conducted by Ute Bastian and Lutz Schönicke. The paper greatly benefited by helpful comments and corrections from Candace O'Connor (University of Alaska Fairbanks) and two anonymous reviewers.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59499
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作者单位: Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Department of Periglacial Research, Potsdam, Germany; Lomonosov Moscow State University, Faculty of Geology, Russian Federation; National Research Tomsk Polytechnic University, Russian Federation; Institute of Archaeology and Ethnography, SB RAS, Novosibirsk, Russian Federation; Novosibirsk State University, Russian Federation; Altai State University, Barnaul, Russian Federation; Kazan Federal University, Institute of Geology and Petroleum Technologies, Russian Federation; St. Petersburg State University, Institute of Earth Sciences, Köppen Laboratory, Russian Federation; University of Cologne, Institute of Geology and Mineralogy, Germany

Recommended Citation:
Wetterich S.,Tumskoy V.,Rudaya N.,et al. Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic)[J]. Quaternary Science Reviews,2016-01-01,147
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