Short-term upper-ocean variability in the central equatorial Indian Ocean during 2006 Indian Ocean Dipole event
Article first published online: 29 MAY 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 14, July 2008
How to Cite
2008), Short-term upper-ocean variability in the central equatorial Indian Ocean during 2006 Indian Ocean Dipole event, Geophys. Res. Lett., 35, L14S09, doi:10.1029/2008GL033834., , , , , and (
- Issue published online: 29 MAY 2008
- Article first published online: 29 MAY 2008
- Manuscript Accepted: 22 APR 2008
- Manuscript Revised: 10 APR 2008
- Manuscript Received: 3 MAR 2008
- upper-ocean variability;
- Indian Ocean;
- 2006 IOD
 Intensive observations, using an array of surface and subsurface moored buoys, are conducted around 80.5°E in the equatorial Indian Ocean during October/November 2006. An intriguing data set of atmospheric and oceanic variables during a peak phase of a positive Indian Ocean Dipole is obtained. The ocean observation data shows relatively shallow thermocline, which intensifies with time during the one-month period, and eastward subsurface zonal flow under westward flowing surface current, generating unusually strong vertical shear above the thermocline. Intraseasonal meridional current variability is also observed. Upper-ocean volume budget analysis indicates that a strong upwelling event, larger than 10 m/day, and associated upward movement of the isotherms below the thermocline occur for a few days in early November. These observed data demonstrates unusual conditions of the upper ocean during boreal autumn in 2006.