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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Dynamical Response of Changjiang River Plume to a Severe Typhoon With the Surface Wave-Induced Mixing
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Dynamical Response of Changjiang River Plume to a Severe Typhoon With the Surface Wave-Induced Mixing

机译：长江羽流与表面波诱导混合严重台风的动力响应

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摘要

Typhoons (or hurricanes) are the most energetic atmospheric forcing acting on coastal waters. Here in this study, we investigated the response of the summertime Changjiang River plume to a typical typhoon, Chan-hom (1509), with a combination of field observation and numerical simulation. Surface wave-induced mixing was considered in the model configuration. The results showed that the typical offshore-extending summer Changjiang River plume completely disappeared under the influence of typhoon wind. Instead, it extended southward along the Zhejiang and Fujian (Zhe-Min) coast as a typical wintertime Changjiang River plume. The along-shelf plume extension lasted for extra similar to 10days after the typhoon passage, until another strong weather event came. The competition between wind-driven current and buoyancy-driven current dominated the recovery of the Changjiang River plume. Through calculation, we found that the freshwater transported to the Zhe-Min Coastal Water reached similar to 4.7x10(10)m(3) as influenced by typhoon Chan-hom, which was similar to 5% of the total Changjiang River discharge in 2015 or similar to 12% of the total dry season Changjiang River discharge (October-April) when the majority of Changjiang River plume extended to Zhe-Min Coastal Water. The remote sensing data of chlorophyll- from Geostationary Ocean Color Imager also showed that significant algal bloom occurred when the southward extending Changjiang River plume retreated. Surface wave-induced mixing caused by typhoon wind was found to be important in destroying the vertical plume stratification and elongating the recovery processes from the typhoon influence.
机译：Typhoons（或飓风）是充满活力的大气强迫行动沿海水域。在这项研究中，我们调查了夏令时长江羽流阵列的典型台风，陈磡（1509），具有现场观察和数值模拟的组合。在模型配置中考虑了表面波诱导的混合。结果表明，典型的海上延伸夏季长江羽流完全消失在台风风的影响下。相反，它沿着浙江和福建（哲闽）海岸向南延伸，作为典型的冬季长江羽流。在台风通道之后，沿着货架羽流延伸到10天，直到另一个强大的天气发生。风力驱动的电流与浮力驱动的电流之间的竞争主导了长江羽流的恢复。通过计算，我们发现将淡水运输到哲闽沿海水的含量相似至4.7×10（10）米（3），受台风陈国影响的影响，这与2015年长江省总汇总的5％相似或类似于长江河排放总干燥季节（四月至四月）的12％的长江羽流扩展到浙江沿海用水。来自地球杆菌海洋彩色成像仪的叶绿素遥感数据也表明，当南方延伸长江羽流撤退时，发生了重大的藻类绽放。由台风风引起的表面波诱导的混合在破坏垂直羽状分层并从台风影响中伸长回收过程。

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