Direct South Pacific Water Intrusion Into the Indonesian Seas

Abstract Mooring observations in the Halmahera Sea during September 2018 through October 2020 show a mean transport of 0.37–0.76 Sv through the Gebe Strait into the Indonesian seas. This estimate, together with mooring measurements in the Makassar Strait, the Maluku Channel, and the Jailolo Strait of the Halmahera Sea, suggests the total mean transport of the Indonesian Throughflow (ITF) to be 16.8 Sv ± 1.0 Sv (1 Sv = 10 6 m 3 s −1 ), larger than the 15 Sv mean transport previously measured at the exit straits. Mooring data in the Maluku and Halmahera Seas, combined with Lagrangian tracking of the Makassar Strait throughflow using reanalysis velocity, show that 40% of the total ITF transport comes directly from the South Pacific Ocean. The above findings have revised the traditional concept that the ITF comes mainly from the North Pacific. One Sentence Summary The direct South Pacific to Indian Ocean transfer into the Great Ocean Conveyor is revealed.

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Publication Details

Journal
Geophysical Research Letters
Published
2025-12-21
DOI
https://doi.org/10.1029/2025gl116805
Primary Topic
Oceanographic and Atmospheric Processes
Type
article
Field-Weighted Citation Impact
0.00

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article

Direct South Pacific Water Intrusion Into the Indonesian Seas

Praditya Avianto, Grevo S. Gerung, Fransisco P.T. Pangalila, Xueli Yin et al.
Geophysical Research Letters
Oceanographic and Atmospheric Processes
article

Direct South Pacific Water Intrusion Into the Indonesian Seas

Praditya Avianto, Grevo S. Gerung, Fransisco P.T. Pangalila, Xueli Yin, Jane M. Mamuaja, Patrice N.I. Kalangi, Arnold L. Gordon, Priyadi Dwi Santoso, Zainal Arifin, Su Xin, Tianxiang Chang, Dongliang Yuan, Dirhamsyah, Mingting Li
article en

Abstract

Abstract Mooring observations in the Halmahera Sea during September 2018 through October 2020 show a mean transport of 0.37–0.76 Sv through the Gebe Strait into the Indonesian seas. This estimate, together with mooring measurements in the Makassar Strait, the Maluku Channel, and the Jailolo Strait of the Halmahera Sea, suggests the total mean transport of the Indonesian Throughflow (ITF) to be 16.8 Sv ± 1.0 Sv (1 Sv = 10 6 m 3 s −1 ), larger than the 15 Sv mean transport previously measured at the exit straits. Mooring data in the Maluku and Halmahera Seas, combined with Lagrangian tracking of the Makassar Strait throughflow using reanalysis velocity, show that 40% of the total ITF transport comes directly from the South Pacific Ocean. The above findings have revised the traditional concept that the ITF comes mainly from the North Pacific. One Sentence Summary The direct South Pacific to Indian Ocean transfer into the Great Ocean Conveyor is revealed.

Geophysical Research LettersVol. 52(24)
Lamont-Doherty Earth Observatory (US), Hohai University (CN), Chinese Academy of Sciences (CN), Institute of Oceanology (CN), Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (CN), Qingdao National Laboratory for Marine Science and Technology (CN), First Institute of Oceanography (CN), National Nuclear Energy Agency of Indonesia (ID), Sam Ratulangi University (ID), Columbia University (US)
Badan Riset dan Inovasi Nasional, National Natural Science Foundation of China, Lembaga Ilmu Pengetahuan Indonesia, Universitas Sam Ratulangi
Life below water
Openalex Percentile: Top 29%
Oceanographic and Atmospheric Processes
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