DOI: 10.1002/grl.50941
论文题名: Paleogeographic controls on the onset of the Antarctic circumpolar current
作者: Hill D.J. ; Haywood A.M. ; Valdes P.J. ; Francis J.E. ; Lunt D.J. ; Wade B.S. ; Bowman V.C.
刊名: Geophysical Research Letters
ISSN: 0094-8497
EISSN: 1944-8228
出版年: 2013
卷: 40, 期: 19 起始页码: 5199
结束页码: 5204
语种: 英语
英文关键词: Antarctic Circumpolar Current
; gateways
; glaciation
; Oligocene
; paleoceanography
; paleogeography
Scopus关键词: Antarctic Circumpolar Currents
; glaciation
; Oligocene
; Paleoceanography
; Paleogeography
; Gateways (computer networks)
; Ocean currents
; Glacial geology
; circumpolar current
; climate modeling
; comparative study
; glacier dynamics
; Oligocene
; paleogeography
; simulation
; Southern Ocean
英文摘要: Development of the Antarctic Circumpolar Current (ACC) during the Cenozoic is controversial in terms of timing and its role in major climate transitions. Some propose that the development of the ACC was instrumental in the continental scale glaciation of Antarctica and climate cooling at the Eocene/Oligocene boundary. Here we present climate model results that show that a coherent ACC was not possible during the Oligocene due to Australasian paleogeography, despite deep water connections through the Drake Passage and Tasman Gateway and the initiation of Antarctic glaciation. The simulations of ocean currents compare well to paleoenvironmental records relating to the physical oceanography of the Oligocene and provide a framework for understanding apparently contradictory dating of the initiation of the ACC. We conclude that the northward motion of the Australasian land masses and the reconfiguration of the Tasman Seaway and Drake Passage are necessary preconditions for the formation of a strong, coherent ACC. Key Points Paleogeography is crucial in Antarctic Circumpolar Current (ACC) initiation Gateway opening and Antarctic glaciation are insufficient to establish the ACC Modeling provides a framework to understand different dates for ACC initiation ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884752213&doi=10.1002%2fgrl.50941&partnerID=40&md5=b14bf4fbd027ac2b91774a1fd9801782
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5761
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
Recommended Citation:
Hill D.J.,Haywood A.M.,Valdes P.J.,et al. Paleogeographic controls on the onset of the Antarctic circumpolar current[J]. Geophysical Research Letters,2013-01-01,40(19).