globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2012.07.026
Scopus记录号: 2-s2.0-84878912435
论文题名:
Major lake level fluctuations and climate changes for the past 16,000 years as reflected by diatoms and chironomids preserved in the sediment of Laguna Potrok Aike, southern Patagonia
作者: Massaferro J.; Recasens C.; Larocque-Tobler I.; Zolitschka B.; Maidana N.I.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71
起始页码: 167
结束页码: 174
语种: 英语
英文关键词: Chironomids ; Diatoms ; Holocene ; Lateglacial ; Paleoclimatic reconstruction
Scopus关键词: Chironomids ; Diatoms ; Holocenes ; Lateglacial ; Paleoclimatic reconstruction ; Climate change ; Glacial geology ; Phytoplankton ; Sedimentology ; Water levels ; Lakes ; climate change ; climate conditions ; diatom ; fly ; fossil record ; geochronology ; Holocene ; humid environment ; lacustrine deposit ; lacustrine environment ; lake level ; late glacial ; oligotrophic environment ; paleoclimate ; paleoenvironment ; paleolimnology ; preservation ; proxy climate record ; reconstruction ; regional climate ; resolution ; semiarid region ; steppe ; water level ; Antarctica ; Argentina ; Laguna Potrok Aike ; Santa Cruz [Argentina] ; Bacillariophyta ; Chironomidae
英文摘要: Laguna Potrok Aike is a maar lake located in southernmost Argentina and is one of the few permanent lakes preserving a continuous climatic record from the semiarid Patagonian steppe. Furthermore, its location close to Antarctica provides a unique opportunity to compare paleoclimate from continental South America with the polar records. The analysis of subfossil chironomids and diatoms throughout a 16-m sedimentary record retrieved from this lake, combined with a well-constrained chronology of the last ca 16ka BP, provided a high resolution paleoenvironmental reconstruction of the limnology of the lake and regional climate conditions. The combination of both bioproxies showed humid conditions during the Lateglacial, followed by drier conditions during the Holocene, resulting in large variations in lake level. Despite not showing a clear evidence of a cold reversal similar to the Antarctic Cold Reversal and/or the Younger Dryas, both records suggest high water levels and oligotrophic conditions between 16.4 and 11.5 cal. ka BP. The lake level drop that occurred at ca 8.7ka BP is well documented by both bioproxies. © 2012 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60619
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作者单位: CONICET, CENAC, APN, Bariloche, Argentina; Department of Geology and Paleontology, University of Geneva, Geneva, Switzerland; LimnoPaleoServ, Lyss, Switzerland; DBBE - FCEN, Universidad de Buenos Aires - CONICET, Buenos Aires, Argentina; GEOPOLAR, Institute of Geography, University of Bremen, Germany

Recommended Citation:
Massaferro J.,Recasens C.,Larocque-Tobler I.,et al. Major lake level fluctuations and climate changes for the past 16,000 years as reflected by diatoms and chironomids preserved in the sediment of Laguna Potrok Aike, southern Patagonia[J]. Quaternary Science Reviews,2013-01-01,71
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