DOI: 10.1002/2015GL063307
论文题名: Abrupt intensification of North Atlantic Deep Water formation at the Nordic Seas during the late Pliocene climate transition
作者: Sato M. ; Makio M. ; Hayashi T. ; Ohno M.
刊名: Geophysical Research Letters
ISSN: 0094-8669
EISSN: 1944-8400
出版年: 2015
卷: 42, 期: 12 起始页码: 4949
结束页码: 4955
语种: 英语
英文关键词: Iceland-Scotland Overflow Water
; Integrated Ocean Drilling Program Expedition 306
; late Pliocene transition
; Nordic Seas
; North Atlantic Deep Water
Scopus关键词: Coercive force
; Lithology
; Oceanography
; Sediments
; Integrated ocean drilling programs
; Late Pliocene
; Nordic seas
; North Atlantic Deep Water
; Scotland
; Deepwater drilling
; climate change
; deep water
; deep-sea sediment
; interglacial
; isotherm
; magnetic mineral
; mixing
; North Atlantic Deep Water
; Ocean Drilling Program
; Pliocene
; Arctic Ocean
; Atlantic Ocean
; Gardar Drift
; Iceland
; Norwegian Sea
; Scotland
; United Kingdom
英文摘要: Knowledge of the evolution of North Atlantic Deep Water (NADW) is key to understanding the past evolution of the climatic system. Here we developed a new rock-magnetic method to determine the constituent magnetic minerals of sediments and report on the evolution of NADW during 2.2-2.9 Ma. We measured isothermal remanence acquisition curves of North Atlantic deep-sea sediments drilled at the Gardar Drift and decomposed the first derivatives of these curves into high-coercivity and low-coercivity components. Residuals of the decomposition were sufficiently small throughout the study interval, confirming that the Gardar Drift sediments represent a mixing of the two end-members. Fractional changes of the high-coercivity component represent variation of the Iceland-Scotland Overflow Water, a branch of NADW formed at the Nordic Seas. The high-coercivity component increased significantly during an interglacial period just after ∼2.68 Ma, which suggests that NADW formation in the Nordic Seas abruptly intensified at this time. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946811480&doi=10.1002%2f2015GL063307&partnerID=40&md5=3bdb89b5444721e587caa8f8b5eef976
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8285
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Recommended Citation:
Sato M.,Makio M.,Hayashi T.,et al. Abrupt intensification of North Atlantic Deep Water formation at the Nordic Seas during the late Pliocene climate transition[J]. Geophysical Research Letters,2015-01-01,42(12).