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A Cenozoic record of the equatorial Pacific carbonate compensation depth

A Cenozoic record of the equatorial Pacific carbonate compensation depth
A Cenozoic record of the equatorial Pacific carbonate compensation depth
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.
0028-0836
609-614
Pälike, Heiko
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Lyle, Mitchell W.
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Nishi, Hiroshi
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Backman, Jan
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Pälike, Heiko
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Nishi, Hiroshi
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Raffi, Isabella
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Gamage, Kusali
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Klaus, Adam
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Acton, Gary
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Anderson, Louise
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Backman, Jan
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Baldauf, Jack
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Bohaty, Steven M.
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Delaney, Margaret
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Dewangan, Pawan
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Fitch, Peter
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Foster, Gavin L.
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Gussone, Nikolaus
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Hasegawa, Hitoshi
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Herrle, Jens O.
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Holbourn, Ann
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Hovan, Steve
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Hyeong, Kiseong
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Iijima, Koichi
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Ito, Takashi
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Leon-Rodriguez, Lizette
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Murphy, Brandon H.
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Sawada, Ken
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Scher, Howie
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Sluijs, Appy
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Takata, Hiroyuki
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Zeebe, Richard E.
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Pälike, Heiko, Lyle, Mitchell W., Nishi, Hiroshi, Raffi, Isabella, Ridgwell, Andy, Gamage, Kusali, Klaus, Adam, Acton, Gary, Anderson, Louise, Backman, Jan, Baldauf, Jack, Beltran, Catherine, Bohaty, Steven M., Bown, Paul, Busch, William, Channell, Jim E. T., Chun, Cecily O.J., Delaney, Margaret, Dewangan, Pawan, Dunkley Jones, Tom, Edgar, Kirsty M., Evans, Helen, Fitch, Peter, Foster, Gavin L., Gussone, Nikolaus, Hasegawa, Hitoshi, Hathorne, Ed C., Hayashi, Hiroki, Herrle, Jens O., Holbourn, Ann, Hovan, Steve, Hyeong, Kiseong, Iijima, Koichi, Ito, Takashi, Kamikuri, Shin-ichi, Kimoto, Katsunori, Kuroda, Junichiro, Leon-Rodriguez, Lizette, Malinverno, Alberto, Moore Jr, Ted C., Murphy, Brandon H., Murphy, Daniel P., Nakamura, Hideto, Ogane, Kaoru, Ohneiser, Christian, Richter, Carl, Robinson, Rebecca, Rohling, Eelco J., Romero, Oscar, Sawada, Ken, Scher, Howie, Schneider, Leah, Sluijs, Appy, Takata, Hiroyuki, Tian, Jun, Tsujimoto, Akira, Wade, Bridget S., Westerhold, Thomas, Wilkens, Roy, Williams, Trevor, Wilson, Paul A., Yamamoto, Yuhji, Yamamoto, Shinya, Yamazaki, Toshitsugu and Zeebe, Richard E. (2012) A Cenozoic record of the equatorial Pacific carbonate compensation depth. Nature, 488 (7413), 609-614. (doi:10.1038/nature11360).

Record type: Article

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.

This record has no associated files available for download.

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Published date: 2012
Organisations: Geochemistry, Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 342456
URI: http://eprints.soton.ac.uk/id/eprint/342456
DOI: doi:10.1038/nature11360
ISSN: 0028-0836
PURE UUID: 1fe32495-cceb-4abd-9884-bc956ba28e6f
ORCID for Steven M. Bohaty: ORCID iD orcid.org/0000-0002-1193-7398
ORCID for Gavin L. Foster: ORCID iD orcid.org/0000-0003-3688-9668
ORCID for Eelco J. Rohling: ORCID iD orcid.org/0000-0001-5349-2158
ORCID for Paul A. Wilson: ORCID iD orcid.org/0000-0001-6425-8906

Catalogue record

Date deposited: 30 Aug 2012 09:56
Last modified: 15 Mar 2024 03:35

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Contributors

Author: Heiko Pälike
Author: Mitchell W. Lyle
Author: Hiroshi Nishi
Author: Isabella Raffi
Author: Andy Ridgwell
Author: Kusali Gamage
Author: Adam Klaus
Author: Gary Acton
Author: Louise Anderson
Author: Jan Backman
Author: Jack Baldauf
Author: Catherine Beltran
Author: Steven M. Bohaty ORCID iD
Author: Paul Bown
Author: William Busch
Author: Jim E. T. Channell
Author: Cecily O.J. Chun
Author: Margaret Delaney
Author: Pawan Dewangan
Author: Tom Dunkley Jones
Author: Kirsty M. Edgar
Author: Helen Evans
Author: Peter Fitch
Author: Gavin L. Foster ORCID iD
Author: Nikolaus Gussone
Author: Hitoshi Hasegawa
Author: Ed C. Hathorne
Author: Hiroki Hayashi
Author: Jens O. Herrle
Author: Ann Holbourn
Author: Steve Hovan
Author: Kiseong Hyeong
Author: Koichi Iijima
Author: Takashi Ito
Author: Shin-ichi Kamikuri
Author: Katsunori Kimoto
Author: Junichiro Kuroda
Author: Lizette Leon-Rodriguez
Author: Alberto Malinverno
Author: Ted C. Moore Jr
Author: Brandon H. Murphy
Author: Daniel P. Murphy
Author: Hideto Nakamura
Author: Kaoru Ogane
Author: Christian Ohneiser
Author: Carl Richter
Author: Rebecca Robinson
Author: Eelco J. Rohling ORCID iD
Author: Oscar Romero
Author: Ken Sawada
Author: Howie Scher
Author: Leah Schneider
Author: Appy Sluijs
Author: Hiroyuki Takata
Author: Jun Tian
Author: Akira Tsujimoto
Author: Bridget S. Wade
Author: Thomas Westerhold
Author: Roy Wilkens
Author: Trevor Williams
Author: Paul A. Wilson ORCID iD
Author: Yuhji Yamamoto
Author: Shinya Yamamoto
Author: Toshitsugu Yamazaki
Author: Richard E. Zeebe

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