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No consistent simulated trends in the Atlantic Meridional Overturning Circulation for the past 6,000 years
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  • Zhiyi Jiang,
  • Christopher Meltcalfe Brierley,
  • Jürgen Bader,
  • Pascale Braconnot,
  • Michael P. Erb,
  • Peter O. Hopcroft,
  • Dabang Jiang,
  • Johann H Jungclaus,
  • Vyacheslav C. Khon,
  • Gerrit Lohmann,
  • Olivier Marti,
  • Matthew Osman,
  • Bette L Otto-Bliesner,
  • Birgit Schneider,
  • Xiaoxu Shi,
  • David Thornalley,
  • Zhiping Tian,
  • Qiong Zhang
Zhiyi Jiang
University College London

Corresponding Author:[email protected]

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Christopher Meltcalfe Brierley
University College London
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Jürgen Bader
Max Planck Institute for Meteorology
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Pascale Braconnot
LSCE-IPSL
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Michael P. Erb
Northern Arizona University
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Peter O. Hopcroft
University of Birmingham
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Dabang Jiang
Institute of Atmospheric Physics, Chinese Academy of Sciences
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Johann H Jungclaus
Max Planck Institute for Meteorology
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Vyacheslav C. Khon
University of Kiel
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Gerrit Lohmann
AWI
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Olivier Marti
IPSL
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Matthew Osman
University of Arizona
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Bette L Otto-Bliesner
National Center for Atmospheric Research (UCAR)
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Birgit Schneider
Institute of Geosciences, Christian-Albrechts-University of Kiel
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Xiaoxu Shi
The Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research
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David Thornalley
University College London
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Zhiping Tian
Institute of Atmospheric Physics, Chinese Academy of Sciences
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Qiong Zhang
Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University
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Abstract

The Atlantic Meridional Overturning Circulation (AMOC) is a key feature of the North Atlantic with global ocean impacts. The AMOC’s response to past changes in forcings during the Holocene provides important context for the coming centuries. Here, we investigate AMOC trends using an emerging set of transient simulations using multiple global climate models for the past 6,000 years. We find no consistent changes in the overall AMOC strength across the simulations, which conforms with reconstructions assimilating proxy records. Similarly, the decadal variability of the AMOC does not change during the mid- and late-Holocene. There are interesting AMOC changes seen in the early Holocene, but their nature depends a lot on which inputs are used to drive the experiment.
02 Feb 2023Submitted to ESS Open Archive
09 Feb 2023Published in ESS Open Archive