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Permanent link (DOI): https://doi.org/10.7939/R32W26

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Interdecadal Variability along 38°N in the North Atlantic Open Access

Descriptions

Other title
Subject/Keyword
North Atlantic
NAO
interdecadal variability
LSW
DWBC
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Lei, Ji
Supervisor and department
Andrew B.G. Bush (Earth and Atmospheric Sciences)
Paul G. Myers (Earth and Atmospheric Sciences)
Examining committee member and department
Paul G. Myers (Earth and Atmospheric Sciences)
Andrew B.G. Bush (Earth and Atmospheric Sciences)
Thian Gan (Civil and Environmental Engineering)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2009-12-21T21:47:26Z
Graduation date
2010-06
Degree
Master of Science
Degree level
Master's
Abstract
Hydrographic data, in the time range from 1908 to 2006, extracted from the International Council for the Exploration of the Sea (ICES) database, are used to examine variability of water masses in the North Atlantic ocean along 38°N. All the data are interpolated in an ideal isopycnal framework, which has a longitudinal resolution of 1/3 degree and 50 isopycnal layers of variable thickness, to 38°N by using an objective analysis approach. A 5 year-running mean triad analysis is performed from 1950 to 2004 for further variability study. Extensive decadal to inter-decadal variability is observed, in both shallow and deep layers. In the deep layers, a signal of westward phase propagating is detected, coincided with the time scale of a first mode baroclinic Rossby wave transporting at this latitude. Strong negative correlations (maximum at a lag of 7 years) are seen between the variability in the DWBC and the North Atlantic Oscillation. A similar correlation at the same lag is also detected in the basin interior, suggesting the Labrador Sea Water (LSW) pathway is not only restrained to the DWBC.
Language
English
DOI
doi:10.7939/R32W26
Rights
License granted by Ji Lei (jlei@ualberta.ca) on 2009-12-18T18:58:50Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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