DOI: 10.5194/cp-9-679-2013
Scopus记录号: 2-s2.0-84881130929
论文题名: Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): Evidence from the geochemical record of Lake El'gygytgyn
作者: Cunningham L. ; Vogel H. ; Wennrich V. ; Juschus O. ; Nowaczyk N. ; Rosén P.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 2 起始页码: 679
结束页码: 686
语种: 英语
Scopus关键词: climate change
; data acquisition
; geochemical cycle
; ice core
; lacustrine environment
; marine isotope stage
; paleoclimate
; record
; silica
; titanium
; Arctic
; Chukchi
; Elgygytgyn Lake
; Greenland
; Russian Federation
英文摘要: To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacialinterglacial cycles during the last three million years. Lowresolution studies at this lake have suggested that changes observed during Transition IV (the transition from marine isotope stage (MIS) 10 to MIS 9) are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high-resolution analyses of Transition IV from a terrestrial Arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica (BSi) production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and BSi records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements. © Author(s) 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49428
Appears in Collections: 气候变化与战略
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Recommended Citation:
Cunningham L.,Vogel H.,Wennrich V.,et al. Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): Evidence from the geochemical record of Lake El'gygytgyn[J]. Climate of the Past,2013-01-01,9(2)