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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area
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Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area

机译：推动Kuroshio地下水的主要动力因素到达浙江沿海地区

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摘要

Observations indicate a seasonal variation of the Kuroshio subsurface water (KSSW) intrusion into the coastal region off the Zhejiang Province of China. The observed temperature and salinity distributions suggest a stronger intrusion in June and weaker intrusion in December. A hydrodynamic model well reproduces the seasonal variation of temperature and salinity characteristics and the current structure over the continental shelf. A passive tracer in the subsurface layer is used to investigate the movement of the KSSW. Tracer experiments confirm the seasonal variation of the KSSW intrusion, showing that the intrusion is stronger in summer and weaker in autumn and winter. Moreover, tracer concentrations suggest that in general it takes at least 1.5months for the KSSW from east of Taiwan to reach the Zhejiang coastal area. Analyses of the momentum balances indicate that the KSSW's northward movement is regulated by the geostrophic current, while the shoreward intrusion results from the bottom Ekman effect. The seasonal changes in pressure gradients and vertical eddy viscosities contribute to the KSSW intrusion into the Zhejiang coastal area in June rather than in December. Sensitivity experiments show that the seasonal variation of the KSSW intrusion is mainly induced by the different wind stresses in summer and winter. The stronger southerly monsoon, the weaker and warmer Taiwan Warm Current, and the stronger and colder Kuroshio Current are favorable to the KSSW intrusion.
机译：观察结果表明Kuroshio地下水（KSSW）入侵中国浙江省沿海地区的季节性变化。观察到的温度和盐度分布表明6月份的侵入性并于12月的侵扰较弱。流体动力学模型良好地再现温度和盐度特性的季节变化以及大陆架上的电流结构。地下层中的被动示踪剂用于研究KSSW的运动。示踪剂实验证实了KSSW侵入的季节变化，表明夏季和秋季较弱的入侵。此外，示踪剂浓度表明，一般来说，台湾以东的KSSW至少需要至少1.5个月，以抵达浙江沿海地区。动量余额的分析表明KSSW的向北运动受到地顶尖电流的调节，而底部Ekman效应的映射结果是由施加的。压力梯度和垂直涂层粘度的季节变化有助于六月而不是12月的浙江沿海地区的KSSW侵入。敏感性实验表明，KSSW侵入的季节变化主要由夏季和冬季的不同风力胁迫引起。较强的南风季风，台湾温暖的电流较弱，温暖，更冷的金刚电流对KSSW入侵有利。

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