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Strengthened Indonesian throughflow drives decadal warming in the Southern Indian Ocean


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Zhang, Y, Feng, M, Du, Y, Phillips, HE ORCID: 0000-0002-2941-7577, Bindoff, NL ORCID: 0000-0001-5662-9519 and McPhaden, MJ 2018 , 'Strengthened Indonesian throughflow drives decadal warming in the Southern Indian Ocean' , Geophysical Research Letters, vol. 45, no. 12 , pp. 6167-6175 , doi: 10.1029/2018GL078265.

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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: Article
Authors/Creators:Zhang, Y and Feng, M and Du, Y and Phillips, HE and Bindoff, NL and McPhaden, MJ
Keywords: Indian Ocean, heat budget, Indonesian throughflow
Journal or Publication Title: Geophysical Research Letters
Publisher: Amer Geophysical Union
ISSN: 0094-8276
DOI / ID Number: 10.1029/2018GL078265
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Copyright 2018 American Geophysical Union

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