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Atlantic-Pacific Asymmetry in Deep-Water Formation

Ferreira, David and Cessi, Paola and Coxall, Helen K. and de Boer, Agatha and Dijkstra, Henk A. and Drijfhout, Sybren S. and Eldevik, Tor and Harnik, Nili and McManus, Jerry F. and Marshall, David P. and Nilsson, Johan and Roquet, Fabien and Schneider, Tapio and Wills, Robert C. (2018) Atlantic-Pacific Asymmetry in Deep-Water Formation. Annual Review of Earth and Planetary Sciences, 46 . pp. 327-352. ISSN 0084-6597. https://resolver.caltech.edu/CaltechAUTHORS:20180316-101647631

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Abstract

While the Atlantic Ocean is ventilated by high-latitude deep water formation and exhibits a pole-to-pole overturning circulation, the Pacific Ocean does not. This asymmetric global overturning pattern has persisted for the past 2–3 million years, with evidence for different ventilation modes in the deeper past. In the current climate, the Atlantic-Pacific asymmetry occurs because the Atlantic is more saline, enabling deep convection. To what extent the salinity contrast between the two basins is dominated by atmospheric processes (larger net evaporation over the Atlantic) or oceanic processes (salinity transport into the Atlantic) remains an outstanding question. Numerical simulations have provided support for both mechanisms; observations of the present climate support a strong role for atmospheric processes as well as some modulation by oceanic processes. A major avenue for future work is the quantification of the various processes at play to identify which mechanisms are primary in different climate states.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1146/annurev-earth-082517-010045DOIArticle
https://www.annualreviews.org/doi/10.1146/annurev-earth-082517-010045PublisherArticle
ORCID:
AuthorORCID
Ferreira, David0000-0003-3243-9774
McManus, Jerry F.0000-0002-7365-1600
Schneider, Tapio0000-0001-5687-2287
Wills, Robert C.0000-0002-7776-2076
Additional Information:© 2018 Annual Reviews. Review in Advance first posted online on March 15, 2018. The authors are not aware of any affiliations, memberships, funding, or financial holdings that might be perceived as affecting the objectivity of this review. We acknowledge funding from the International Meteorological Institute and the Bolin Centre for Climate Research for the workshop on “The Atlantic Meridional Overturning Circulation in a Global Perspective” held at Stockholm University in September 2015. P.C., J.F.M., and T.S. acknowledge support from the US National Science Foundation (grant OCE-1634128 to P.C., grant AGS-1635019 to J.F.M., and grant AGS-1019211 to T.S.). T.E. acknowledges support from the Research Council of Norway (project NORTH). T.S. thanks Ryan Abernathey and Laure Zanna for helpful discussions.
Funders:
Funding AgencyGrant Number
International Meteorological InstituteUNSPECIFIED
Bolin Centre for Climate ResearchUNSPECIFIED
NSFOCE-1634128
NSFAGS-1635019
NSFAGS-1019211
Research Council of NorwayUNSPECIFIED
Subject Keywords:meridional overturning circulation, salinity, hydrological cycle, multiple equilibria, climate, deep water formation
Record Number:CaltechAUTHORS:20180316-101647631
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180316-101647631
Official Citation:Atlantic-Pacific Asymmetry in Deep Water Formation David Ferreira, Paola Cessi, Helen K. Coxall, Agatha de Boer, Henk A. Dijkstra, Sybren S. Drijfhout, Tor Eldevik, Nili Harnik, Jerry F. McManus, David P. Marshall, Johan Nilsson, Fabien Roquet, Tapio Schneider, Robert C. Wills Annual Review of Earth and Planetary Sciences 2018 46:1, 327-352
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85345
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Mar 2018 22:28
Last Modified:09 Mar 2020 13:19

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