DOI: 10.1002/2014GL059581
论文题名: Slowdown of circumpolar deepwater flow during the late Neogene: Evidence from a mudwave field at the Argentine continental slope
作者: Gruetzner J. ; Uenzelmann-Neben G. ; Franke D. ; Arndt J.E.
刊名: Geophysical Research Letters
ISSN: 0094-10265
EISSN: 1944-9996
出版年: 2014
卷: 41, 期: 6 起始页码: 2070
结束页码: 2076
语种: 英语
英文关键词: Argentine margin
; Circumpolar Deepwater
; Contourites
; Mudwaves
Scopus关键词: Geophysics
; Argentine margins
; Contourites
; Deep western boundary currents
; Deepwater
; Geochemical evidence
; Global thermohaline circulation
; Mudwaves
; Seismic reflection profiles
; Earth sciences
; borehole logging
; bottom current
; circumpolar current
; continental slope
; deep water
; Neogene
; paleoceanography
; Pliocene-Pleistocene boundary
; seismic reflection
; thermohaline circulation
; wave field
; western boundary current
; Argentine Shelf
; Atlantic Ocean
英文摘要: Geochemical evidence from boreholes suggests enhanced transport of Northern Component Water (NCW) to southern latitudes from about 6 Ma onward. However, information on how this change in transport influenced the intensity and position of current systems is sparse. Here we use seismic reflection profiles interpreted together with bathymetric data to investigate current derived deposits at the central Argentine Margin. Upslope migrating mudwaves overlying a late Miocene erosional unconformity provide evidence that Circumpolar Deepwater flow slowed down with the onset of NCW inflow. During the last ∼3 Ma, changes in dimensions and migration rates of the waves are small indicating continuous bottom current flow conditions similar to today with only minor variations in flow speed, suggesting that the Deep Western Boundary Current in the western south Atlantic as observed today has been a pervasive feature of the global thermohaline circulation system during the Plio-/Pleistocene. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896551614&doi=10.1002%2f2014GL059581&partnerID=40&md5=a3a85a18f2f9998685af5f753babf2a8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7529
Appears in Collections: 气候减缓与适应
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作者单位: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
Recommended Citation:
Gruetzner J.,Uenzelmann-Neben G.,Franke D.,et al. Slowdown of circumpolar deepwater flow during the late Neogene: Evidence from a mudwave field at the Argentine continental slope[J]. Geophysical Research Letters,2014-01-01,41(6).