SATELKAR N P
Articles written in Journal of Earth System Science
Volume 130 All articles Published: 28 April 2021 Article ID 0075 Brief Communication
Two decades of current observations in the equatorial Indian Ocean
VINEET JAIN AMOL P APARNA S G FERNANDO V KANKONKAR A MURTY V S N ALMEIDA A M AREEF A SARDAR KHALAP S T SATELKAR N P GHATKAR S TARI P A GAONKAR M G KHEDEKAR R
Deep-sea moorings in the equatorial Indian Ocean were first deployed by India in the year 2000, and currents were measured at three locations (77$^{\circ}$E, 83$^{\circ}$E, and 93$^{\circ}$E) on the equator. In this paper, we present two decades of current observations from these moorings and discuss how the moorings have evolved with time. The observations show that the 180-day (90-day) period dominates the surface and mid-depth (bottom) circulation. Though the Wyrtki Jets are strong, the near-surface currents do not show any clear semi-annual reversals. The reversals become evident only below 100 m.
$\bf{Highlights}$
$\bullet$ Twenty years of ocean current data collected at the equatorial Indian Ocean
$\bullet$ Bottom current data show strong intraseasonal variability
$\bullet$ Upward phase propagation associated with the semi-annual cycle more prominent for the mid-depth currents
$\bullet$ The semi-annual reversals not evident every year near the surface
Volume 132, 2023
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