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A sea change in our view of overturning in the subpolar North Atlantic

A sea change in our view of overturning in the subpolar North Atlantic
A sea change in our view of overturning in the subpolar North Atlantic
To provide an observational basis for the Intergovernmental Panel on Climate Change projections of a slowing Atlantic meridional overturning circulation (MOC) in the 21st century, the Overturning in the Subpolar North Atlantic Program (OSNAP) observing system was launched in the summer of 2014. The first 21-month record reveals a highly variable overturning circulation responsible for the majority of the heat and freshwater transport across the OSNAP line. In a departure from the prevailing view that changes in deep water formation in the Labrador Sea dominate MOC variability, these results suggest that the conversion of warm, salty, shallow Atlantic waters into colder, fresher, deep waters that move southward in the Irminger and Iceland basins is largely responsible for overturning and its variability in the subpolar basin.
0036-8075
516-521
Lozier, M. S.
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Li, F.
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Bacon, S.
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Bahr, F.
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Bower, A. S.
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Cunningham, S. A.
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De Jong, M. F.
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De Steur, L.
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Fischer, J.
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Gary, S. F.
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Greenan, B. J. W.
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Holliday, N. P.
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Houk, A.
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Karstensen, J.
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Koman, G.
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Le Bras, I. A.
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Lin, X.
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Mackay, N.
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Marshall, D. P.
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Mercier, H.
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Oltmanns, M.
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Rayner, D.
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Straneo, F.
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Thierry, V.
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Williams, R. G.
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Wilson, C.
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Yang, J.
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Yashayaev, I.
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Lozier, M. S.
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Li, F.
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Bacon, S.
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Bahr, F.
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Cunningham, S. A.
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De Jong, M. F.
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Karstensen, J.
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Lin, X.
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Mackay, N.
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Oltmanns, M.
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Rayner, D.
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Straneo, F.
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Thierry, V.
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Torres, D. J.
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Williams, R. G.
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Wilson, C.
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Yang, J.
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Yashayaev, I.
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Zhao, J.
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Lozier, M. S., Li, F., Bacon, S., Bahr, F., Bower, A. S., Cunningham, S. A., De Jong, M. F., De Steur, L., Deyoung, B., Fischer, J., Gary, S. F., Greenan, B. J. W., Holliday, N. P., Houk, A., Houpert, L., Inall, M. E., Johns, W. E., Johnson, H. L., Johnson, C., Karstensen, J., Koman, G., Le Bras, I. A., Lin, X., Mackay, N., Marshall, D. P., Mercier, H., Oltmanns, M., Pickart, R. S., Ramsey, A. L., Rayner, D., Straneo, F., Thierry, V., Torres, D. J., Williams, R. G., Wilson, C., Yang, J., Yashayaev, I. and Zhao, J. (2019) A sea change in our view of overturning in the subpolar North Atlantic. Science, 363 (6426), 516-521. (doi:10.1126/science.aau6592).

Record type: Article

Abstract

To provide an observational basis for the Intergovernmental Panel on Climate Change projections of a slowing Atlantic meridional overturning circulation (MOC) in the 21st century, the Overturning in the Subpolar North Atlantic Program (OSNAP) observing system was launched in the summer of 2014. The first 21-month record reveals a highly variable overturning circulation responsible for the majority of the heat and freshwater transport across the OSNAP line. In a departure from the prevailing view that changes in deep water formation in the Labrador Sea dominate MOC variability, these results suggest that the conversion of warm, salty, shallow Atlantic waters into colder, fresher, deep waters that move southward in the Irminger and Iceland basins is largely responsible for overturning and its variability in the subpolar basin.

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More information

Accepted/In Press date: 18 December 2018
e-pub ahead of print date: 1 February 2019
Published date: 1 February 2019
Learn more about Engineering Sciences research

Identifiers

Local EPrints ID: 430588
URI: http://eprints.soton.ac.uk/id/eprint/430588
DOI: doi:10.1126/science.aau6592
ISSN: 0036-8075
PURE UUID: fa0826cb-8a49-4116-983e-aba58bde015b

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Date deposited: 03 May 2019 16:30
Last modified: 16 Mar 2024 00:28

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Contributors

Author: M. S. Lozier
Author: F. Li
Author: S. Bacon
Author: F. Bahr
Author: A. S. Bower
Author: S. A. Cunningham
Author: M. F. De Jong
Author: L. De Steur
Author: B. Deyoung
Author: J. Fischer
Author: S. F. Gary
Author: B. J. W. Greenan
Author: N. P. Holliday
Author: A. Houk
Author: L. Houpert
Author: M. E. Inall
Author: W. E. Johns
Author: H. L. Johnson
Author: C. Johnson
Author: J. Karstensen
Author: G. Koman
Author: I. A. Le Bras
Author: X. Lin
Author: N. Mackay
Author: D. P. Marshall
Author: H. Mercier
Author: M. Oltmanns
Author: R. S. Pickart
Author: A. L. Ramsey
Author: D. Rayner
Author: F. Straneo
Author: V. Thierry
Author: D. J. Torres
Author: R. G. Williams
Author: C. Wilson
Author: J. Yang
Author: I. Yashayaev
Author: J. Zhao

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