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Remarkable warming of the Southern Indian Ocean during the recent two decades is assessed using a heat budget analysis based on the Estimating the Circulation and Climate of the Ocean version 4 release 3 model results. The annual mean temperature averaged in the upper-700m Southern Indian Ocean during 1998-2015 has experienced significant warming at a rate of 1.03×10^-2℃/yr. A heat budget analysis indicates that the increase is mostly driven by decreased cooling from net air-sea heat flux and increased warming from heat advection. Increased ITF advection is the largest contributor to warming the upper 700m of the Southern Indian Ocean, while the reduction of surface turbulent heat flux is of secondary importance. These results expand our understanding of the decadal heat balance in the Indian Ocean and of Indo-Pacific decadal climate variability.

Item Type:	Refereed Article
Keywords:	Indian Ocean, heat budget, Indonesian throughflow
Research Division:	Earth Sciences
Research Group:	Oceanography
Research Field:	Physical oceanography
Objective Division:	Environmental Policy, Climate Change and Natural Hazards
Objective Group:	Understanding climate change
Objective Field:	Climate variability (excl. social impacts)
UTAS Author:	Phillips, HE (Associate Professor Helen Phillips)
UTAS Author:	Bindoff, NL (Professor Nathan Bindoff)
ID Code:	126580
Year Published:	2018
Web of Science® Times Cited:	51
Deposited By:	Oceans and Cryosphere
Deposited On:	2018-06-18
Last Modified:	2018-11-27
Downloads:	101 View Download Statistics