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Ocean ventilation and deoxygenation in a warming world: introduction and overview

Ocean ventilation and deoxygenation in a warming world: introduction and overview
Ocean ventilation and deoxygenation in a warming world: introduction and overview
Changes of ocean ventilation rates and deoxygenation are two of the less obvious but important indirect impacts expected as a result of climate change on the oceans. They are expected to occur because of (i) the effects of increased stratification on ocean circulation and hence its ventilation, due to reduced upwelling, deep-water formation and turbulent mixing, (ii) reduced oxygenation through decreased oxygen solubility at higher surface temperature, and (iii) the effects of warming on biological production, respiration and remineralization. The potential socio-economic consequences of reduced oxygen levels on fisheries and ecosystems may be far-reaching and significant. At a Royal Society Discussion Meeting convened to discuss these matters, 12 oral presentations and 23 posters were presented, covering a wide range of the physical, chemical and biological aspects of the issue. Overall, it appears that there are still considerable discrepancies between the observations and model simulations of the relevant processes. Our current understanding of both the causes and consequences of reduced oxygen in the ocean, and our ability to represent them in models are therefore inadequate, and the reasons for this remain unclear. It is too early to say whether or not the socio-economic consequences are likely to be serious. However, the consequences are ecologically, biogeochemically and climatically potentially very significant, and further research on these indirect impacts of climate change via reduced ventilation and oxygenation of the oceans should be accorded a high priority.
1364-503X
Shepherd, John G.
f38de3ac-eb3b-403f-8767-c76be68d8bf2
Brewer, Peter G.
a2ce749e-e6d0-4e08-8700-5a71d5a0c857
Oschlies, Andreas
75e18f55-3134-44a2-82ba-71334397727f
Watson, Andrew J.
55e619df-85a4-4079-922b-8cb1f17290a8
Shepherd, John G.
f38de3ac-eb3b-403f-8767-c76be68d8bf2
Brewer, Peter G.
a2ce749e-e6d0-4e08-8700-5a71d5a0c857
Oschlies, Andreas
75e18f55-3134-44a2-82ba-71334397727f
Watson, Andrew J.
55e619df-85a4-4079-922b-8cb1f17290a8

Shepherd, John G., Brewer, Peter G., Oschlies, Andreas and Watson, Andrew J. (2017) Ocean ventilation and deoxygenation in a warming world: introduction and overview. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 375 (2102), [20170240]. (doi:10.1098/rsta.2017.0240).

Record type: Article

Abstract

Changes of ocean ventilation rates and deoxygenation are two of the less obvious but important indirect impacts expected as a result of climate change on the oceans. They are expected to occur because of (i) the effects of increased stratification on ocean circulation and hence its ventilation, due to reduced upwelling, deep-water formation and turbulent mixing, (ii) reduced oxygenation through decreased oxygen solubility at higher surface temperature, and (iii) the effects of warming on biological production, respiration and remineralization. The potential socio-economic consequences of reduced oxygen levels on fisheries and ecosystems may be far-reaching and significant. At a Royal Society Discussion Meeting convened to discuss these matters, 12 oral presentations and 23 posters were presented, covering a wide range of the physical, chemical and biological aspects of the issue. Overall, it appears that there are still considerable discrepancies between the observations and model simulations of the relevant processes. Our current understanding of both the causes and consequences of reduced oxygen in the ocean, and our ability to represent them in models are therefore inadequate, and the reasons for this remain unclear. It is too early to say whether or not the socio-economic consequences are likely to be serious. However, the consequences are ecologically, biogeochemically and climatically potentially very significant, and further research on these indirect impacts of climate change via reduced ventilation and oxygenation of the oceans should be accorded a high priority.

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Ocean Ventilation & Deoxygenation Intro v3 clean - Accepted Manuscript
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Accepted/In Press date: 26 June 2017
e-pub ahead of print date: 7 August 2017
Published date: 13 September 2017

Identifiers

Local EPrints ID: 413183
URI: http://eprints.soton.ac.uk/id/eprint/413183
ISSN: 1364-503X
PURE UUID: 0ecaf0cd-3d25-403b-9175-17b489e398ca
ORCID for John G. Shepherd: ORCID iD orcid.org/0000-0002-5230-4781

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Date deposited: 17 Aug 2017 16:30
Last modified: 07 Oct 2020 05:50

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