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Introduction

Recently, Killworth and Blundell (1999, hereinafter KB99) used the ray approach of Wentzel–Kramers–Brillouin (WKB) theory to investigate the question of whether the large-scale topography could by itself speed up the long extratropical planetary waves of linear standard flat-bottom theory in a way consistent with the observational findings of Chelton and Schlax (1996, hereinafter CS96). By considering particular rays excited along the eastern boundary at the annual frequency in ocean basins with realistic topographies [obtained from a highly smoothed version of the ETOPO5 dataset (National Geophysical Data Center 1988)], they show that the

Introduction

Recently, Killworth and Blundell (1999, hereinafter KB99) used the ray approach of Wentzel–Kramers–Brillouin (WKB) theory to investigate the question of whether the large-scale topography could by itself speed up the long extratropical planetary waves of linear standard flat-bottom theory in a way consistent with the observational findings of Chelton and Schlax (1996, hereinafter CS96). By considering particular rays excited along the eastern boundary at the annual frequency in ocean basins with realistic topographies [obtained from a highly smoothed version of the ETOPO5 dataset (National Geophysical Data Center 1988)], they show that the

Corresponding author address: Dr. Rémi Tailleux, LMD-UPMC Paris 6, Case Courrier 99, 4 Place Jussieu, F-75252 Paris Cedex 05, France. Email: tailleux@lmd.jussieu.fr

Introduction

Recently, Killworth and Blundell (1999, hereinafter KB99) used the ray approach of Wentzel–Kramers–Brillouin (WKB) theory to investigate the question of whether the large-scale topography could by itself speed up the long extratropical planetary waves of linear standard flat-bottom theory in a way consistent with the observational findings of Chelton and Schlax (1996, hereinafter CS96). By considering particular rays excited along the eastern boundary at the annual frequency in ocean basins with realistic topographies [obtained from a highly smoothed version of the ETOPO5 dataset (National Geophysical Data Center 1988)], they show that the

Introduction

Recently, Killworth and Blundell (1999, hereinafter KB99) used the ray approach of Wentzel–Kramers–Brillouin (WKB) theory to investigate the question of whether the large-scale topography could by itself speed up the long extratropical planetary waves of linear standard flat-bottom theory in a way consistent with the observational findings of Chelton and Schlax (1996, hereinafter CS96). By considering particular rays excited along the eastern boundary at the annual frequency in ocean basins with realistic topographies [obtained from a highly smoothed version of the ETOPO5 dataset (National Geophysical Data Center 1988)], they show that the

Corresponding author address: Dr. Rémi Tailleux, LMD-UPMC Paris 6, Case Courrier 99, 4 Place Jussieu, F-75252 Paris Cedex 05, France. Email: tailleux@lmd.jussieu.fr

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