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Observed variability of the South Pacific westward sea level anomaly signal in the presence of bottom topography

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Maharaj, AM and Cipollini, P and Holbrook, NJ (2005) Observed variability of the South Pacific westward sea level anomaly signal in the presence of bottom topography. Geophysical Research Letters, 32 (L04611). pp. 1-5. ISSN 0094-8276

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Abstract

This study investigates the behavior of westward
propagating sea level anomalies across the South Pacific
Ocean, with a focus on the long Rossby wave signal
determined from filtered TOPEX/Poseidon and ERS
satellite altimeter data. An evaluation of the energy
variability of the signal using a two-dimensional Radon
Transform analysis suggests that Rossby waves interact
with both ridges and seamounts at various locations across
the basin. Anomalously slow Rossby wave phase speeds are
found over steep, isolated bathymetric features in the
tropical South Pacific and over the plateau around New
Zealand. Interaction with ridges increases the energetic
variability, range of dominant propagation speeds, and
meridional deviations in the Rossby wave signal.

Item Type: Article
Journal or Publication Title: Geophysical Research Letters
Page Range: pp. 1-5
ISSN: 0094-8276
Identification Number - DOI: 10.1029/2004GL020966
Additional Information:

Copyright 2005 by the American Geophysical Union.

Date Deposited: 05 Jul 2008 07:03
Last Modified: 18 Nov 2014 03:44
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