DOI: 10.1016/j.quascirev.2016.03.025
Scopus记录号: 2-s2.0-84962022171
论文题名: Orbital obliquity cycles recorded in Kuroshio Current region, eastern Asia, around Plio-Pleistocene boundary
作者: Iwatani H. ; Kondo Y. ; Irizuki T. ; Iwai M. ; Ikehara M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 140 起始页码: 67
结束页码: 74
语种: 英语
英文关键词: Kuroshio
; Orbital obliquity cycle
; Ostracoda
; Plio-Pleistocene
Scopus关键词: Salinity measurement
; Sea level
; Temperature
; Kuroshio
; Modern analog techniques
; Orbital obliquity cycle
; Ostracoda
; Oxygen isotope records
; Plio-pleistocene
; Quantitative estimation
; Sea-level oscillations
; Ocean currents
; fossil
; global climate
; obliquity
; ostracod
; oxygen isotope
; paleoenvironment
; Pliocene-Pleistocene boundary
; shallow water
; water depth
; water temperature
; Japan
; Kuroshio Current
; Pacific Ocean
; Shikoku
; Crustacea
; Ostracoda
英文摘要: Global climate underwent a period of significant cooling at the Plio-Pleistocene Transition (~2.6 Ma). The influence of this change on the Kuroshio Current region in the Pacific Ocean, off eastern Asia, is not well known. In this study, we clarify temporal changes in the paleoenvironment under the influence of the Kuroshio Current during the late Pliocene and early Pleistocene using high-resolution faunal proxy records of fossil Ostracoda (Crustacea). The study unit is the Ananai Formation in the southeastern region of Shikoku, southwest Japan. The modern analog technique (MAT) is employed for the quantitative estimation of paleo-bottom water temperatures (PBWTs) and paleo-water depth (PWD) during the deposition of the formation. Ostracode MAT results show PBWT fluctuations during warmest and coldest months, with values of 16°C-20 °C and 12°C-16 °C, respectively, and a PWD of 70-140 m, reflecting sea-level oscillations. Moreover, the PBWT in the coldest month is 3 °C-4 °C lower than present-day water temperatures at the same shallow water depths. Temporal changes in these paleoenvironmental variables based on MAT are in good agreement with global oxygen isotope records. Orbital obliquity cycles with 41-kyr periodicity are recorded for the first time in an onshore section in the Kuroshio Current region at the Plio-Pleistocene boundary interval. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59602
Appears in Collections: 过去全球变化的重建
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作者单位: School of Biological Sciences, The University of Hong Kong, Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong SAR, China; Department of Natural Science, Kochi University, Kochi, Japan; Department of Geoscience, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue, Japan; Center for Advanced Marine Core Research, Kochi University, B 200 Monobe, Nankoku, Kochi, Japan
Recommended Citation:
Iwatani H.,Kondo Y.,Irizuki T.,et al. Orbital obliquity cycles recorded in Kuroshio Current region, eastern Asia, around Plio-Pleistocene boundary[J]. Quaternary Science Reviews,2016-01-01,140