A Cenozoic record of the equatorial Pacific carbonate compensation depth

Research output: Contribution to journalArticle

Authors

  • H. Pälike
  • S.M. Bohaty
  • C.O.J. Chun
  • G.L. Foster
  • D.P. Murphy
  • E.J. Rohling
  • P.A. Wilson
  • M.W. Lyle
  • J. Baldauf
  • H. Nishi
  • I. Raffi
  • A. Ridgwell
  • K. Gamage
  • A. Klaus
  • G. Acton
  • L. Anderson
  • J. Backman
  • C. Beltran
  • P. Bown
  • W. Busch
  • J.E.T. Channell
  • J.O. Herrle
  • M. Delaney
  • P. Dewangan
  • P. Fitch
  • H. Evans
  • A. Malinverno
  • T. Williams
  • N. Gussone
  • H. Hasegawa
  • E.C. Hathorne
  • H. Hayashi
  • A. Holbourn
  • S. Hovan
  • K. Hyeong
  • K. Iijima
  • T. Ito
  • S.-I. Kamikuri
  • H. Nakamura
  • K. Sawada
  • Y. Yamamoto
  • K. Kimoto
  • J. Kuroda
  • L. Leon-Rodriguez
  • T.C. Moore Jr
  • B.H. Murphy
  • K. Ogane
  • C. Ohneiser
  • C. Richter
  • R. Robinson
  • O. Romero
  • H. Scher
  • L. Schneider
  • A. Sluijs
  • H. Takata
  • J. Tian
  • A. Tsujimoto
  • B.S. Wade
  • T. Westerhold
  • R. Wilkens
  • S. Yamamoto
  • T. Yamazaki
  • R.E. Zeebe

External organisations

  • University of Otago
  • Tohoku University
  • Deptartment of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
  • Louisiana Tech University, Ruston, Louisiana 71272, USA
  • Westfälische Wilhelms-Universität Münster
  • The University of Texas at Brownsville and Texas Southmost College, Brownsville, Texas 78520, USA
  • SOUTHAMPTON UNIVERSITY
  • BRISTOL UNIVERSITY
  • Stockholm University
  • University of Leicester
  • UNIVERSITY COLLEGE LONDON HOSPITALS
  • University of New Orleans
  • Lamont-Doherty Earth Observatory of Columbia University
  • Utrecht University
  • PUSAN NATIONAL UNIVERSITY
  • Jacobs University Bremen
  • AIST
  • University of Leeds
  • Goethe University Frankfurt
  • Senckenberg Gesellschaft für Naturforschung
  • Universitá G. DAnnunzio'
  • University of California, Davis
  • UMR 7193
  • 241 Williamson Hall
  • University of California, Santa Cruz
  • National Institute of Oceanography
  • South Kensington Campus
  • Hokkaido University
  • Helmholtz Centre for Ocean Research Kiel
  • Shimane University
  • Christian-Albrechts-Universität zu Kiel
  • 114 Walsh Hall
  • ANSAN
  • Japan Agency for Marine-Earth Science and Technology
  • Ibaraki University
  • Kochi University
  • JAMSTEC
  • MS-126
  • 1100 North University
  • University of Rhode Island
  • Campus Fuentenueva
  • 509 Deike Building
  • Tongji University
  • University of Hawaii at Manoa
  • Yamanashi Institute of Environmental Sciences

Abstract

Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium carbonate compensation depth, which is the oceanic depth at which calcium carbonate is dissolved. Here we present a carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean. The carbonate compensation depth tracks long-term ocean cooling, deepening from 3.0-3.5-kilometres during the early Cenozoic (approximately 55-million years ago) to 4.6 kilometres at present, consistent with an overall Cenozoic increase in weathering. We find large superimposed fluctuations in carbonate compensation depth during the middle and late Eocene. Using Earth system models, we identify changes in weathering and the mode of organic-carbon delivery as two key processes to explain these large-scale Eocene fluctuations of the carbonate compensation depth. © 2012 Macmillan Publishers Limited. All rights reserved.

Details

Original languageEnglish
Pages (from-to)609-614
Number of pages6
JournalNature
Volume488
Issue number7413
Publication statusPublished - 30 Aug 2012