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Global synchrony of an accelerating rise in sea surface temperature

Published online by Cambridge University Press:  02 July 2012

Philip C. Reid  and
Grégory Beaugrand
Philip C. Reid*
Affiliation:
Sir Alister Hardy Foundation for Ocean Science (SAHFOS), The Laboratory, Citadel Hill, The Hoe, Plymouth PL1 2PB, UK Marine Institute, Plymouth University (MIPU), Drake Circus, Plymouth PL4 8AA, UK Marine Biological Association of the United Kingdom (MBA), The Laboratory, Citadel Hill, Plymouth PL1 2PB, UK
Grégory Beaugrand
Affiliation:
Centre National de la Recherche Scientifique, Laboratoire d'Océanologie et de Géosciences (LOG), UMR 8187 LOG, Université des Sciences et Technologies de Lille, BP 80, 62930 Wimereux, France
*
Correspondence should be addressed to: P.C. Reid, SAHFOS, The Marine Laboratory, Citadel Hill, The Hoe, Plymouth PL1 2PB, UK email: pcre@sahfos.ac.uk
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Abstract

The oceans have shown a recent rapid and accelerating rise in temperature with, given the close link between temperature and marine organisms, pronounced effects on ecosystems. Here we describe for the first time a globally synchronous pattern of pulsed short period (~1 year long) emanations of warm sea surface temperature anomalies from tropical seas towards the poles on the shelf/slope with an intensification of the warming after the 1976/1977, 1986/1987 and 1997/1998 El Niños. On the eastern margins of continents the anomalies propagate towards the poles in part by largely baroclinic boundary currents, reinforced by regional atmospheric warming. The processes contributing to the less continuous warm anomalies on western margins are linked to the transfer of warmth from adjacent western boundary currents. These climate induced events show a close parallelism with the timing of ecosystem changes in shelf seas, important for fisheries and ecosystem services, and melting of sea-ice.

Keywords

sea surface temperatureprincipal component analysisboundary currentsAtlantic Multidecadal OscillationEl NiñoAtlantic Gyre Indexecosystem synchronyregime shiftsea-iceearthquake

Information

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 7 , November 2012 , pp. 1435 - 1450
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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