globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.03.019
论文题名:
Impact processes, permafrost dynamics, and climate and environmental variability in the terrestrial Arctic as inferred from the unique 3.6 Myr record of Lake El'gygytgyn, Far East Russia – A review
作者: Wennrich V.; Andreev A.A.; Tarasov P.E.; Fedorov G.; Zhao W.; Gebhardt C.A.; Meyer-Jacob C.; Snyder J.A.; Nowaczyk N.R.; Schwamborn G.; Chapligin B.; Anderson P.M.; Lozhkin A.V.; Minyuk P.S.; Koeberl C.; Melles M.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 147
起始页码: 221
结束页码: 244
语种: 英语
英文关键词: Arctic amplification ; ICDP ; Impact history ; Lake El'gygytgyn ; Mid-Pliocene warmth ; Permafrost dynamics ; Pliocene/Pleistocene transition ; Super-interglacials
Scopus关键词: Amplification ; Climate change ; Drops ; Dynamics ; Fluorine ; Forestry ; Glacial geology ; Glaciers ; Ice ; Isotopes ; Permafrost ; Rock drilling ; Sediments ; Structural geology ; Vegetation ; Volcanic rocks ; Environmental evolution ; Environmental variability ; ICDP ; Interglacial cyclicity ; Interglacials ; Mid-Pliocene ; Pliocene ; West antarctic ice sheets ; Lakes ; arctic environment ; Beringia ; climate variation ; Cordilleran Ice Sheet ; crater lake ; environmental change ; glacial-interglacial cycle ; historical ecology ; isotopic analysis ; marine isotope stage ; nutrient dynamics ; paleoenvironment ; permafrost ; Pliocene-Pleistocene boundary ; vegetation dynamics ; warming ; Chukchi ; Elgygytgyn Lake ; Russian Federation
英文摘要: Lake El'gygytgyn in Far East Russia is a 3.6 Myr old impact crater lake. Located in an area that has never been affected by Cenozoic glaciations nor desiccation, the unique sediment record of the lake represents the longest continuous sediment archive of the terrestrial Arctic. The surrounding crater is the only impact structure on Earth developed in mostly acid volcanic rocks. Recent studies on the impactite, permafrost, and sediment sequences recovered within the framework of the ICDP “El'gygytgyn Drilling Project” and multiple pre-site surveys yielded new insight into the bedrock origin and cratering processes as well as permafrost dynamics and the climate and environmental history of the terrestrial Arctic back to the mid-Pliocene. Results from the impact rock section recovered during the deep drilling clearly confirm the impact genesis of the El'gygytgyn crater, but indicate an only very reduced fallback impactite sequence without larger coherent melt bodies. Isotope and element data of impact melt samples indicate a F-type asteroid of mixed composition or an ordinary chondrite as the likely impactor. The impact event caused a long-lasting hydrothermal activity in the crater that is assumed to have persisted for c. 300 kyr. Geochemical and microbial analyses of the permafrost core indicate a subaquatic formation of the lower part during lake-level highstand, but a subaerial genesis of the upper part after a lake-level drop after the Allerød. The isotope signal and ion compositions of ground ice is overprinted by several thaw-freeze cycles due to variations in the talik underneath the lake. Modeling results suggest a modern permafrost thickness in the crater of c. 340 m, and further confirm a pervasive character of the talik below Lake El'gygytgyn. The lake sediment sequences shed new leight into the Pliocene and Pleistocene climate and environmental evolution of the Arctic. During the mid-Pliocene, significantly warmer and wetter climatic conditions in western Beringia than today enabled dense boreal forests to grow around Lake El'gygytgyn and, in combination with a higher nutrient flux into the lake, promoted primary production. The exceptional warmth during the mid-Pliocene is in accordance with other marine and terrestrial records from the Arctic and indicates a period of enhanced “Arctic amplification”. The favourable conditions during the mid-Pliocene were repeatedly interrupted by climate deteriorations, e.g., during Marine Isotope Stage (MIS) M2, when pollen data and sediment proxies indicate a major cooling and the onset of local permafrost around the lake. A gradual vegetation change after c. 3.0 Ma points to the onset of a long-term cooling trend during the Late Pliocene that culminated in major temperature drops, first during MIS G6, and later during MIS 104. These cold events coincide with the onset of an intensified Northern Hemisphere (NH) glaciation and the largest extent of the Cordilleran Ice Sheet, respectively. After the Pliocene/Pleistocene transition, local vegetation and primary production in Lake El'gygtygyn experienced a major change from relatively uniform conditions to a high-amplitude glacial-to-interglacial cyclicity that fluctuated on a dominant 41 kyr obliquity band, but changed to a 100 kyr eccentricity dominance during the Middle Pleistocene transition (MPT) at c. 1.2–0.6 Ma. Periods of exceptional warming in the Pleistocene record of Lake El'gygytgyn with dense boreal forests around and peaks of primary production in the lake are assigned to so-called “super-interglacial” periods. The occurrence of these super-interglacials well corresponds to collapses of the West Antarctic Ice Sheet (WAIS) recorded in ice-free periods in the ANDRILL core, which suggests strong intrahemispheric teleconnections presumably driven by changes in the thermocline ocean circulation. © 2016 Elsevier Ltd
资助项目: Wennrich, V. ; Institute of Geology and Mineralogy, University of Cologne, Zuelpicher Str. 49a, Germany ; 电子邮件: volker.wennrich@uni-koeln.de
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59496
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Institute of Geology and Mineralogy, University of Cologne, Zuelpicher Str. 49a, Cologne, Germany; Institute of Geology and Petroleum Technologies, Kazan Federal University, Kremlyovskaya Str. 18, Kazan, Russian Federation; Free University Berlin, Institute of Geological Sciences, Palaeontology Section, Malteser Str. 74-100, Building D, Berlin, Germany; Arctic and Antarctic Research Institute, Bering Street 38, St. Petersburg, Russian Federation; St. Petersburg State University, Institute of Earth Sciences, 10 Line V.O., 33, St. Petersburg, Russian Federation; Alfred Wegener Institute for Polar and Marine Research, Am Alten Hafen 26, Bremerhaven, Germany; Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden; Department of Geology, Bowling Green State University, Bowling Green, OH, United States; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, Germany; Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43, Potsdam, Germany; Earth and Space Sciences and Quaternary Research Center, University of Washington, Seattle, United States; Northeast Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, Portovaya Street 16, Magadan, Russian Federation; Department of Lithospheric Research, University of Vienna, Althanstrasse 14, Vienna, Austria; Natural History Museum, Burgring 7, Vienna, Austria

Recommended Citation:
Wennrich V.,Andreev A.A.,Tarasov P.E.,et al. Impact processes, permafrost dynamics, and climate and environmental variability in the terrestrial Arctic as inferred from the unique 3.6 Myr record of Lake El'gygytgyn, Far East Russia – A review[J]. Quaternary Science Reviews,2016-01-01,147
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wennrich V.]'s Articles
[Andreev A.A.]'s Articles
[Tarasov P.E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Wennrich V.]'s Articles
[Andreev A.A.]'s Articles
[Tarasov P.E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wennrich V.]‘s Articles
[Andreev A.A.]‘s Articles
[Tarasov P.E.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.