Heat contribution of the Indonesian throughflow to the Indian Ocean

Zhang Tiecheng; Wang Weiqiang; Xie Qiang; Chen Lingfang

doi:10.1007/s13131-019-1414-6

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Article Navigation > Acta Oceanologica Sinica > 2019 > 38(4): 72-79

Zhang Tiecheng, Wang Weiqiang, Xie Qiang, Chen Lingfang. Heat contribution of the Indonesian throughflow to the Indian Ocean[J]. Acta Oceanologica Sinica, 2019, 38(4): 72-79. doi: 10.1007/s13131-019-1414-6

Citation:

Zhang Tiecheng, Wang Weiqiang, Xie Qiang, Chen Lingfang. Heat contribution of the Indonesian throughflow to the Indian Ocean[J]. Acta Oceanologica Sinica, 2019, 38(4): 72-79. doi: 10.1007/s13131-019-1414-6

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Heat contribution of the Indonesian throughflow to the Indian Ocean

doi: 10.1007/s13131-019-1414-6

1.
Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3.
Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
4.
Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China

Received Date: 2018-02-08

Abstract

Abstract

Based on the high-resolution Eulerian fields of an ocean general circulation model simulation, the heat contribution of the Indonesian throughflow (ITF) to the Indian Ocean is estimated by Lagrangian tracing method. The heat transport of each particle of ITF waters is calculated by tracing temperature change along the trajectory until the particle exits the Indian Ocean. The simulation reveals that the ITF waters flow westward and branch near Madagascar, further showing the ITF waters are redistributed in both northern and southern Indian Ocean. Heat budget analysis indicates that the ITF waters gain 0.41 PW (Petawatts, 10¹⁵ W) in the northern Indian Ocean and lose 0.56 PW in the southern Indian Ocean, respectively. As a result, the ITF waters warm the whole Indian Ocean basin with only 0.15 PW, which shows an "insignificant" role of ITF on the Indian Ocean because of the heat exchange compensation between northern and southern Indian Ocean. Furthermore, the tracing pathways show that the ITF waters mainly flow out the Indian Ocean at both sides of the basin via Agulhas Current and Leeuwin Current. About 89% of the ITF waters leave along western boundary and the rest 11% along eastern boundary. Compared to seeding section, 0.10 PW and 0.05 PW are released to the Indian Ocean, respectively.
- Indonesian throughflow,
- Indian Ocean,
- heat contribution

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References(38)

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