KOPRI Repository

Effect of early Pliocene uplift on late Pliocene cooling in the Arctic-Atlantic gateway

Cited 33 time in scopus
Metadata Downloads
Title
Effect of early Pliocene uplift on late Pliocene cooling in the Arctic-Atlantic gateway
Other Titles
후기 플라이오세의 북극해-북대서양 관문해역 기온하강에 미친 전기 플라이오세 융기의 영향
Authors
J. Knies
C. Gaina
Lee, Mi Jung
S. Baranwal
W. Jokat
K. Andreassen
J. Matthiessen
N. Andersen
Ch. Vogt
S. De Schepper
K. Husum
K. Grosfjeld
K. Fabian
R. Mattingsdal
Subject
Geochemistry & Geophysics
Keywords
Arctic Ocean; Gateway; Northern hemisphere glaciation; Pliocene uplift
Issue Date
2014
Citation
J. Knies, et al. 2014. "Effect of early Pliocene uplift on late Pliocene cooling in the Arctic-Atlantic gateway". EARTH AND PLANETARY SCIENCE LETTERS, 387(1): 132-144.
Abstract
Despite the undisputed role of the Arctic Ocean in the modern and Pliocene climate system, the Arctic has only recently attracted public awareness that ongoing, fundamental change in the Arctic cryosphere could be a response to global warming. Clarification of the Arctic´s role in global climate during the Pliocene is, however, largely hampered by equivocal stratigraphic constraints. From a well-dated Pliocene sequence from the Yermak Plateau, NW Spitsbergen, we present sedimentological and geochemical data indicating that 4 million years ago terrigenous sediment supply and sources changed abruptly in response to a regional tectonic uplift event. We argue that this event together with contemporary uplift and tilting along the northwestern European continental margin preconditioned the landmasses for glacial ice build-up during intensification of the Northern Hemisphere Glaciation (INHG). Our data further suggest that the final deepening/widening of the Arctic-Atlantic gateway, the Fram Strait, between 6.5 and 5 Ma gradually caused increased deep water mass exchange which, in turn, likely contributed to the intensification of the North Atlantic thermohaline circulation. Coupled to the North Atlantic warm pool as a regional moisture source, declining atmospheric CO2 levels and other feedback mechanisms during the Pliocene, the regional tectonic activities in the high northern latitudes caused decreased summer ablation and thus allowed the initial build-up of glacial ice both in Scandinavia, and the sub-aerially exposed Svalbard/Barents Sea, culminating in the first large scale coastline-shelf edge glaciations at ~2.75 Ma ago.
URI
http://repository.kopri.re.kr/handle/201206/6052
DOI
http://dx.doi.org/10.1016/J.EPSL.2013.11.007
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse