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Re-emerging ocean temperature anomalies in late-2010 associated with a repeat negative NAO

Re-emerging ocean temperature anomalies in late-2010 associated with a repeat negative NAO
Re-emerging ocean temperature anomalies in late-2010 associated with a repeat negative NAO
Northern Europe was influenced by consecutive episodes of extreme winter weather at the start and end of the 2010 calendar year. A tripole pattern in North Atlantic sea surface temperature anomalies (SSTAs), associated with an exceptionally negative phase of the North Atlantic Oscillation (NAO), characterized both winter periods. This pattern was largely absent at the surface during the 2010 summer season; however equivalent sub-surface temperature anomalies were preserved within the seasonal thermocline throughout the year. Here, we present evidence for the re-emergence of late-winter 2009/10 SSTAs during the following early winter season of 2010/11. The observed re-emergence contributes toward the winter-to-winter persistence of the anomalous tripole pattern. Considering the active influence of the oceans upon leading modes of atmospheric circulation over seasonal timescales, associated with the memory of large-scale sea surface temperature anomaly patterns, the re-emergence of remnant temperature anomalies may have also contributed toward the persistence of a negative winter NAO, and the recurrence of extreme wintry conditions over the initial 2010/11 winter season.
0094-8276
L20601
Taws, Sarah L.
3a16f0d6-1bc3-4405-98fa-1c2ceac38d04
Marsh, Robert
702c2e7e-ac19-4019-abd9-a8614ab27717
Wells, Neil C.
4c27167c-f972-4822-9614-d6ca8d8223b5
Hirschi, Joël
c8a45006-a6e3-4319-b5f5-648e8ef98906
Taws, Sarah L.
3a16f0d6-1bc3-4405-98fa-1c2ceac38d04
Marsh, Robert
702c2e7e-ac19-4019-abd9-a8614ab27717
Wells, Neil C.
4c27167c-f972-4822-9614-d6ca8d8223b5
Hirschi, Joël
c8a45006-a6e3-4319-b5f5-648e8ef98906

Taws, Sarah L., Marsh, Robert, Wells, Neil C. and Hirschi, Joël (2011) Re-emerging ocean temperature anomalies in late-2010 associated with a repeat negative NAO. Geophysical Research Letters, 38 (20), L20601. (doi:10.1029/2011GL048978).

Record type: Article

Abstract

Northern Europe was influenced by consecutive episodes of extreme winter weather at the start and end of the 2010 calendar year. A tripole pattern in North Atlantic sea surface temperature anomalies (SSTAs), associated with an exceptionally negative phase of the North Atlantic Oscillation (NAO), characterized both winter periods. This pattern was largely absent at the surface during the 2010 summer season; however equivalent sub-surface temperature anomalies were preserved within the seasonal thermocline throughout the year. Here, we present evidence for the re-emergence of late-winter 2009/10 SSTAs during the following early winter season of 2010/11. The observed re-emergence contributes toward the winter-to-winter persistence of the anomalous tripole pattern. Considering the active influence of the oceans upon leading modes of atmospheric circulation over seasonal timescales, associated with the memory of large-scale sea surface temperature anomaly patterns, the re-emergence of remnant temperature anomalies may have also contributed toward the persistence of a negative winter NAO, and the recurrence of extreme wintry conditions over the initial 2010/11 winter season.

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Published date: 2011
Organisations: Marine Systems Modelling, Physical Oceanography

Identifiers

Local EPrints ID: 202999
URI: http://eprints.soton.ac.uk/id/eprint/202999
ISSN: 0094-8276
PURE UUID: 4a21709e-7e28-4918-b646-7cea556ee87e
ORCID for Sarah L. Taws: ORCID iD orcid.org/0000-0002-9445-6089

Catalogue record

Date deposited: 10 Nov 2011 14:26
Last modified: 14 Mar 2024 04:26

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Contributors

Author: Sarah L. Taws ORCID iD
Author: Robert Marsh
Author: Neil C. Wells
Author: Joël Hirschi

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