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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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posted on 2023-05-16, 21:58 authored by Maharaj, AM, Cipollini, P, Neil HolbrookNeil Holbrook
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. Copyright 2005 by the American Geophysical Union.

History

Publication title

Geophysical Research Letters

Volume

32

Issue

4

Pagination

L04611

ISSN

0094-8276

Department/School

School of Geography, Planning and Spatial Sciences

Publisher

American Geophysical Union

Place of publication

United States

Repository Status

  • Restricted

Socio-economic Objectives

Social impacts of climate change and variability

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