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Interannual variability of meridional heat transport and its mechanism in the Indian Ocean during monsoon transitions
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Huibin Xing1, 2, Sheng Chen1, 3, 4, Kang Xu1, 3, 4, Weiqiang Wang1, 3, 4, *
Haiyang Xuebao | 2021, 43(12) : 26 - 37
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Haiyang Xuebao | 2021, 43(12): 26-37
• Article •
Interannual variability of meridional heat transport and its mechanism in the Indian Ocean during monsoon transitions
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Huibin Xing1, 2, Sheng Chen1, 3, 4, Kang Xu1, 3, 4, Weiqiang Wang1, 3, 4, *
Affiliations
  • 1State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
  • 4Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 511458, China
Published: 2021-12-30 doi: 10.12284/hyxb2021105
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Interannual variability of meridional heat transport anomaly (MHTA) in the tropical Indian Ocean (IO) during monsoon transitions (boreal spring and autumn) is investigated based on SODA3.4.2 and POP2 results. There exist two leading interannual modes in spring, namely the consistent mode and the divergence and convergence (div/conv) mode. The consistent mode characterized by the northward MHTA in the upper IO, is controlled by the antisymmetric wind structures with northeasterlies anomalous northeasterlies (northwesterlies) to north (south) of the equator. However, the spring div/conv mode is featured by the meridional divergence in the surface layer and convergence in the subsurface layer on both side of the equator. Such a mode is modulated by the sea surface temperature anomaly (SSTA) dipole in the tropical southwestern IO and subtropical southeastern IO south of the equator. In autumn, the div/conv mode is dominated by the IOD-induced equatorial easterlies and associated anticyclonic wind stress anomalies in the off-equatorial regions. The POP2 model sensitivity experiments confirm the roles of anomalous winds induced by the Indian Ocean SSTA modes in modulating the MHTA, that is, the antisymmetric winds induce northward MHTA, while the anomalous easterly winds lead to the div/conv pattern. Therefore, the interannual variability of air-sea coupled modes in the IO plays a vital role in the basin-scale and hemispheric-scale heat exchanges.

monsoon transitions  /  meridional heat transport  /  consistent mode  /  divergence and convergence mode  /  interannual variability  /  Indian Ocean dipole
Huibin Xing, Sheng Chen, Kang Xu, Weiqiang Wang. Interannual variability of meridional heat transport and its mechanism in the Indian Ocean during monsoon transitions[J]. Haiyang Xuebao, 2021 , 43 (12) : 26 -37 . DOI: 10.12284/hyxb2021105
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Year 2021 volume 43 Issue 12
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Article Info
doi: 10.12284/hyxb2021105
  • Receive Date：2021-03-19
  • Online Date：2026-02-26
  • Published：2021-12-30
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History
  • Received：2021-03-19
  • Revised：2021-04-30
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Affiliations
    1State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
    3Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
    4Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 511458, China
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表12种不同金属材料的力学参数
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Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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