Intraseasonal Kelvin wave in Makassar Strait

TitleIntraseasonal Kelvin wave in Makassar Strait
Publication TypeJournal Article
Year of Publication2013
AuthorsPujiana K., Gordon A.L, Sprintall J
JournalJournal of Geophysical Research-Oceans
Volume118
Pagination2023-2034
Date Published2013/04
Type of ArticleArticle
ISBN Number2169-9275
Accession NumberWOS:000320324100027
KeywordsIndonesian; indonesian throughflow; intraseasonal variability; Kelvin waves; Makassar Strait; ocean; pacific; seas; slope; thermocline; throughflow; variability
Abstract

Time series observations during 2004-2006 reveal the presence of 60-90 days intraseasonal events that impact the transport and mixing environment within Makassar Strait. The observed velocity and temperature fluctuations within the pycnocline reveal the presence of Kelvin waves including vertical energy propagation, energy equipartition, and nondispersive relationship. Two current meters at 750 and 1500m provide further evidence that the vertical structure of the downwelling Kelvin wave resembles that of the second baroclinic wave mode. The Kelvin waves derive their energy from the equatorial Indian Ocean winds, including those associated with the Madden-Julian oscillations, and propagate from Lombok Strait to Makassar Strait along the 100-m isobath. The northward propagating Kelvin waves within the pycnocline reduce the southward Makassar Strait throughflow by up to 2Sv and induce a marked increase of vertical diffusivity.

DOI10.1002/jgrc.20069
Short TitleJ Geophys Res-Oceans
Integrated Research Themes: 
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