DOI: 10.1016/j.quascirev.2014.01.020
Scopus记录号: 2-s2.0-84894455582
论文题名: Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition
作者: Bates S.L. ; Siddall M. ; Waelbroeck C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 88 起始页码: 147
结束页码: 158
语种: 英语
英文关键词: Benthic oxygen isotopes
; Deep ocean temperature
; Mid-Pleistocene transition
; Ocean circulation
; Sea level
英文摘要: During the mid-Pleistocene transition the dominant 41ka periodicity of glacial cycles transitioned to a quasi-100ka periodicity for reasons not yet known. This study investigates the potential role of deep ocean hydrography by examining oxygen isotope ratios in benthic foraminifera. Oxygen isotope records from the Atlantic, Pacific and Indian Ocean basins are separated into their ice volume and local temperature/hydrography components using a piece-wise linear transfer function and a temperature calibration. Although our method has certain limitations, the deep ocean hydrography reconstructions show that glacial deep ocean temperatures approached freezing point as the mid-Pleistocene transition progressed. Further analysis suggests that water mass reorganisation could have been responsible for these temperature changes, leading to such stable conditions in the deep ocean that some obliquity cycles were skipped until precessional forcing triggered deglaciation, creating the apparent quasi-100ka pattern. This study supports previous work that suggests multiples of obliquity cycles dominate the quasi-100ka glacial cycles with precession components driving deglaciations. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60356
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth Sciences, University of Bristol, Bristol, United Kingdom; LSCE/IPSL, Laboratoire CNRS-CEA-UVSQ, Gif-sur-Yvette, France
Recommended Citation:
Bates S.L.,Siddall M.,Waelbroeck C.. Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition[J]. Quaternary Science Reviews,2014-01-01,88