Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon

YIN Ming; LI Xin; XIAO Ziniu; LI Chongyin

doi:10.1007/s13131-018-1240-2

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Article Navigation > Acta Oceanologica Sinica > 2018 > 37(7): 8-19

YIN Ming, LI Xin, XIAO Ziniu, LI Chongyin. Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon[J]. Acta Oceanologica Sinica, 2018, 37(7): 8-19. doi: 10.1007/s13131-018-1240-2

Citation:

YIN Ming, LI Xin, XIAO Ziniu, LI Chongyin. Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon[J]. Acta Oceanologica Sinica, 2018, 37(7): 8-19. doi: 10.1007/s13131-018-1240-2

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Relationships between intensity of the Kuroshio current in the East China Sea and the East Asian winter monsoon

doi: 10.1007/s13131-018-1240-2

1.
Army 61936 of PLA, Haikou 571100, China;Institute of Meteorology and Oceanography, The Army Engineering University of PLA, Nanjing 211101, China
2.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;Institute of Meteorology and Oceanography, The Army Engineering University of PLA, Nanjing 211101, China
3.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2017-08-16

Abstract

Abstract

Based on satellite altimeter and reanalysis data, this paper studies the relationships between the intensity of the Kuroshio current in the East China Sea (ECS) and the East Asian winter monsoon (EAWM). The mechanisms of their possible interaction are also discussed. Results indicate that adjacent transects show consistent variations, and on an interannual timescale, when the EAWM is anomalously strong (weak), the downstream Kuroshio in the ECS is suppressed (enhanced) in the following year from February to April. This phenomenon can be attributed to both the dynamic effect (i.e., Ekman transport) and the thermal effect of the EAWM. When the EAWM strengthens (weakens), the midstream and downstream Kuroshio in the ECS are also suppressed (intensified) during the following year from October to December. The mechanisms vary for these effects. The EAWM exerts its influence on the Kuroshio's intensity in the following year through the tropospheric biennial oscillation (TBO), and oceanic forcing is dominant during this time. The air-sea interaction is modulated by the relative strength of the EAWM and the Kuroshio in the ECS. The non-equivalence of spatial scales between the monsoon and the Kuroshio determines that their interactions are aided by processes with a smaller spatial scale-i.e., local wind stress and heating at the sea surface.
- East Asian winter monsoon,
- Kuroshio intensity,
- East China Sea,
- interaction,
- correlation analysis,
- composite analysis

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