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

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

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3204611m&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 4, CiteID L04611

Physics

6

Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215), Oceanography: Physical: Planetary Waves, Oceanography: Physical: Sea Level: Variations And Mean (1222, 1225, 1641), Oceanography: Physical: Topographic/Bathymetric Interactions

Scientific paper

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.

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