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The forcing of mean sea level variability around Europe

The forcing of mean sea level variability around Europe
The forcing of mean sea level variability around Europe
Mean sea level variability around the European coasts is explored on the basis of regional sea level indices derived through Empirical Orthogonal Function Analysis (EOF) of tidegauge records. The regional indices are cross-correlated amongst themselves and against the major regional and climatic indices. The analysis is done for the whole year as well as seasonally. The effect of coherent atmospheric pressure signals is explored by comparing the results of the analysis before and after the data are corrected for the atmospheric pressure effects. The North Atlantic Oscillation Index (NAO) and the Mediterranean Oscillation Index are the major regional indices which are found to be significantly correlated with sea level variability around Europe. Their correlation is positive for the Northern European coast and negative for the Mediterranean coasts. The NAO influence causes an anti-correlation between northern and southern European sea level. This is stronger in winter and weakens significantly or disappears completely during the summer. When the NAO influence was removed from the regional mean sea level indices the cross correlation between the various regions was reduced. However, residual spatial coherency indicated that probably there are other mechanisms causing spatial coherency. No statistically significant correlation with the Southern Oscillation Index (SOI) was found.
Mean Sea Level, cross correlation, Regional index, NAO, MOI, spatial coherency
0921-8181
196-202
Tsimplis, Michael N.
df6dd749-cda4-46ec-983c-bf022d737031
Shaw, Andrew G.P.
4afa8737-18d4-4c88-98a4-55572fb51562
Tsimplis, Michael N.
df6dd749-cda4-46ec-983c-bf022d737031
Shaw, Andrew G.P.
4afa8737-18d4-4c88-98a4-55572fb51562

Tsimplis, Michael N. and Shaw, Andrew G.P. (2008) The forcing of mean sea level variability around Europe. Global and Planetary Change, 63 (2-3), 196-202. (doi:10.1016/j.gloplacha.2007.08.018).

Record type: Article

Abstract

Mean sea level variability around the European coasts is explored on the basis of regional sea level indices derived through Empirical Orthogonal Function Analysis (EOF) of tidegauge records. The regional indices are cross-correlated amongst themselves and against the major regional and climatic indices. The analysis is done for the whole year as well as seasonally. The effect of coherent atmospheric pressure signals is explored by comparing the results of the analysis before and after the data are corrected for the atmospheric pressure effects. The North Atlantic Oscillation Index (NAO) and the Mediterranean Oscillation Index are the major regional indices which are found to be significantly correlated with sea level variability around Europe. Their correlation is positive for the Northern European coast and negative for the Mediterranean coasts. The NAO influence causes an anti-correlation between northern and southern European sea level. This is stronger in winter and weakens significantly or disappears completely during the summer. When the NAO influence was removed from the regional mean sea level indices the cross correlation between the various regions was reduced. However, residual spatial coherency indicated that probably there are other mechanisms causing spatial coherency. No statistically significant correlation with the Southern Oscillation Index (SOI) was found.

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More information

Submitted date: October 2007
Published date: September 2008
Keywords: Mean Sea Level, cross correlation, Regional index, NAO, MOI, spatial coherency

Identifiers

Local EPrints ID: 47943
URI: http://eprints.soton.ac.uk/id/eprint/47943
ISSN: 0921-8181
PURE UUID: 7885f7bf-4fce-476e-ad5f-bf0c87c728a1

Catalogue record

Date deposited: 13 Aug 2007
Last modified: 08 Jan 2022 13:01

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Contributors

Author: Michael N. Tsimplis
Author: Andrew G.P. Shaw

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