Inverted Echo Sounder Measurement of Dynamic Height Through an ENSO Cycle in the Central Equatorial Pacific

Document Type

Article

Date of Original Version

1-1-1990

Abstract

A four-year record from an inverted echo sounder, deployed near Palmyra Island at 6—N in the central Pacific Ocean, is compared with a simultaneous record of subsurface pressure from this island's lagoon. A factor m, converting round-trip acoustic travel time to surface dynamic height relative to a deep pressure level, was estimated from the ratio of the spectra of the two records in the energetic synoptic oscillation band. Year-to-year variation in m was not statistically significant. For the overall record, m was found to be - 70 — 8 dyn m s-1, where the error bounds represent a 90% confidence interval. This is consistent with first-baroclinic-mode excitation. © 1990 IEEE

Publication Title, e.g., Journal

IEEE Journal of Oceanic Engineering

Volume

15

Issue

4

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