Global reorganization of deep-sea circulation and carbon storage after the last ice age

Patrick Rafter; William Gray; Sophia K. V. Hines; Andrea Burke; Kassandra M. Costa; Julia Gottschalk; Mathis P. Hain; James W. B. Rae; John R. Southon; Maureen H. Walczak; Jimin  Yu; Jess F. Adkins; Tim DeVries

doi:10.1126/sciadv.abq5434

Global reorganization of deep-sea circulation and carbon storage after the last ice age

Patrick Rafter^*, William Gray, Sophia K. V. Hines, Andrea Burke, Kassandra M. Costa, Julia Gottschalk, Mathis P. Hain, James W. B. Rae, John R. Southon, Maureen H. Walczak, Jimin Yu, Jess F. Adkins, Tim DeVries

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Using new and published marine fossil radiocarbon (¹⁴C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most ¹⁴C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO₂.

Original language	English
Article number	eabq5434
Number of pages	9
Journal	Science Advances
Volume	8
Issue number	46
Early online date	16 Nov 2022
DOIs	https://doi.org/10.1126/sciadv.abq5434
Publication status	Published - 16 Nov 2022

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10.1126/sciadv.abq5434Licence: CC BY

Rafter_2022_SA_Global-reorganization_CC
Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/.
Final published version, 2.17 MBLicence: CC BY

INTRIGUED: Investigating the role of the: INTRIGUED: Investigating The Role of the North Pacific in Glacial and Deglacial CO2 and Climate
Rae, J. W. B. (PI) & Burke, A. (CoI)
NERC
1/06/16 → 31/01/20
Project: Standard
REIMAGINATION: Reconstructing and: REIMAGINATION: REconstructing and understanding the IMplications of surface 14C AGe changes In the North Atlantic for overturning circulaTION
Burke, A. (PI) & Rae, J. W. B. (CoI)
NERC
31/12/14 → 31/07/18
Project: Standard

Global reorganization of deep-sea circulation and carbon storage after the last ice age
Rafter, P. A. (Creator), Gray, W. R. (Creator), Hines, S. K. V. (Creator), Burke, A. (Creator), Costa, K. M. (Creator), Gottschalk, J. (Creator), Hain, M. P. (Creator), Rae, J. W. B. (Creator), Southon, J. R. (Creator), Walczak, M. H. (Creator), Yu, J. (Creator), Adkins, J. F. (Creator) & DeVries, T. (Creator), Zenodo, 2022
DOI: 10.5281/zenodo.7112182
Dataset

Cite this

@article{c9028ed258e64776b515db79be23ae37,

title = "Global reorganization of deep-sea circulation and carbon storage after the last ice age",

abstract = "Using new and published marine fossil radiocarbon (14C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most 14C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO2.",

author = "Patrick Rafter and William Gray and Hines, {Sophia K. V.} and Andrea Burke and Costa, {Kassandra M.} and Julia Gottschalk and Hain, {Mathis P.} and Rae, {James W. B.} and Southon, {John R.} and Walczak, {Maureen H.} and Jimin Yu and Adkins, {Jess F.} and Tim DeVries",

note = "Funding: This work was supported by grants from the National Science Foundation (OCE-2015647 and OCE-2032340 to PAR; OCE- 2032343 to MPH); NERC grant NE/N011716/1 to JWBR and NERC grant NE/M004619/1 to AB.",

year = "2022",

month = nov,

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doi = "10.1126/sciadv.abq5434",

language = "English",

volume = "8",

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T1 - Global reorganization of deep-sea circulation and carbon storage after the last ice age

AU - Rafter, Patrick

AU - Gray, William

AU - Hines, Sophia K. V.

AU - Burke, Andrea

AU - Costa, Kassandra M.

AU - Gottschalk, Julia

AU - Hain, Mathis P.

AU - Rae, James W. B.

AU - Southon, John R.

AU - Walczak, Maureen H.

AU - Yu, Jimin

AU - Adkins, Jess F.

AU - DeVries, Tim

N1 - Funding: This work was supported by grants from the National Science Foundation (OCE-2015647 and OCE-2032340 to PAR; OCE- 2032343 to MPH); NERC grant NE/N011716/1 to JWBR and NERC grant NE/M004619/1 to AB.

PY - 2022/11/16

Y1 - 2022/11/16

N2 - Using new and published marine fossil radiocarbon (14C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most 14C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO2.

AB - Using new and published marine fossil radiocarbon (14C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most 14C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO2.

U2 - 10.1126/sciadv.abq5434

DO - 10.1126/sciadv.abq5434

M3 - Article

SN - 2375-2548

VL - 8

JO - Science Advances

JF - Science Advances

IS - 46

M1 - eabq5434

ER -

Global reorganization of deep-sea circulation and carbon storage after the last ice age

Abstract

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Projects

INTRIGUED: Investigating the role of the: INTRIGUED: Investigating The Role of the North Pacific in Glacial and Deglacial CO2 and Climate

REIMAGINATION: Reconstructing and: REIMAGINATION: REconstructing and understanding the IMplications of surface 14C AGe changes In the North Atlantic for overturning circulaTION

Datasets

Global reorganization of deep-sea circulation and carbon storage after the last ice age

Cite this