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Acta Oceanologica Sinica 2021年第3期40卷 34-45页

作者： Zhenyu Liu Wenjing Zhang Xuejun Xiong Shouxian Zhu College of Meteorology and Oceanography National University of Defense TechnologyNanjing 211101China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China College of Oceanography Hohai UniversityNanjing 211101China

The changjiang river diluted water(CDW)spreads into the East China Sea(ECS)primarily in a plume pattern,although in some years,low-salinity water lenses(LSWLs)detach from the main body of the ***-situ observations indicate that in August 2006,a LSWL detached from the main body of the CDW near the river *** this paper,the effects of winds,tides,baroclinity and upwelling on LSWLs are explored with a threedimensional *** results show that:(1)winds play a crucial role in these detachment events because windinduced northerly Eulerian residual currents impose an uneven force on the CDW and cut it off,thus forming a LSWL;(2)upwelling carries high-salinity water from the lower layer to the upper layer,truncating the low-salinity water tongue vertically,which is conducive to the detachment and maintenance of LSWLs;and(3)upwelling during the evolution of a LSWL is caused by the combined effects of winds and *** influences of windinduced upwelling are mainly near the shore,whereas the upwelling along the 30 m isobath is predominantly affected by tides,with the effect increasing from neap tide to spring tide.

关键词： changjiang river diluted water low-salinity water lens numerical simulation observational characteristics dynamic mechanism upwelling

An Observational Analysis of the Relationship Between Wind and the Expansion of the changjiang river diluted water during Summer

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Atmospheric and Oceanic Science Letters 2012年第5期5卷 384-388页

作者： LIU Bao-Chao FENG Li-Cheng State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of At-_ mospherie Physics (lAP) Chinese Aeademy of Sciences Beijing 100029 China Gra-duate University of Chinese Academy of Sciences Beifing 100049 China National Marine Environmental Forecasting Center Beijing 100081 China

This paper presents an analysis of the impact of wind on the transport of the Changiiang river diluted water （CRDW） in August by using the salinity data col- lected on two zonal sections near Cheju-do. Based on the climatological mean conditions and four extreme events, the analysis indicates that wind-induced Ekman transport plays an important role in the extension of the CRDW. The strong northeastward Ekman transport induced by southeasterly wind in 1996, 2003, 2004, and 2006 pushes the core of the CRDW to the sea adjacent to Cheju-do. A comparison of the wind variation before observation among these four extreme events indicates that the expan- sion pattern of the CRDW is primarily changed by synop- tic variation with tirnescales of days to weeks, such as during a typhoon. The weak eastward extension of the CRDW in 2004, accompanied with a relatively strong southerly wind, implies that the oceanographic state （e.g., the depth of halocline） may strongly affect the impact of wind on the extension of the CRDW.

关键词： changjiang river diluted water wind Ekmantransport

A numerical study of summertime expansion pattern of changjiang (Yangtze) river diluted water

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Acta Oceanologica Sinica 2009年第3期28卷 11-16页

作者： SHAN Feng QIAO Fangli XIA Changshui College of Physical and Environmental Oceanography Ocean University of China Qingdao Qingdao 266003 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

Observations show that during summer especially in August, the northward expansion of the changjiang（Yangtze） river diluted water （CRDW） is blocked in the vicinity of the changjiang Estuary. To explain this phenomenon, Princeton ocean model （POM） is applied to simulate the summertime expansion pattern of CRDW. Numerical experiments show that to the north of the changjiang Estuary, a tide-induced temperature front of a cold water centered at （34°N, I22.5°E） plays the key role in determining the expansion pattern of CRDW. This front splits the CRDW into two parts： the main part expands northeastward, and the other small part expands northwestward off the coast of Jiangsu Province, China.

关键词： changjiang river diluted water Princeton ocean model expansion dynamics

Numerical investigation of the control factors driving Zhe-Min Coastal Current

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Acta Oceanologica Sinica 2022年第2期41卷 127-138页

作者： Yang Zhang Fei Chai Joseph Zhang Yang Ding Min Bao Yunwei Yan Hong Li Wei Yu Liang Chang State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China School of Marine Sciences University of MaineOronoME 04469USA Virginia Institute of Marine Science College of William&Mary Center for Coastal Resource ManagementWilliamsburgVA 23185USA Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China

During the northeast monsoon season,Zhe-Min Coastal Current(ZMCC)travels along the Chinese mainland coast and carries fresh,cold,and eutrophic *** is significantly important for the hydrodynamic processes and marine ecosystems along its ***,this bottom-trapped plume deserves to be further discussed in terms of the major driving factor,for which different opinions *** this purpose,in this study,a high resolution Semi-implicit Cross-scale Hydroscience Integrated System Model(SCHISM)is established and *** correlation coefficients exist between along-shelf wind speeds and seasonal variations of both ZMCC volume transport and the freshwater *** coefficients imply that the wind is important in regulating ***,for similar annual mean ZMCC volume transports,the extreme south boundaries of Zhe-Min Coastal water(ZMCW)are different among different *** difference is attracting attention and is explored in this *** to the low wind/discharge experiment,it was found that although the volume transport of ZMCC is more sensitive to the variation of local wind speeds,the carried freshwater is limited by the changjiang river discharge,which ultimately determines the south boundary of *** momentum analysis at transects I and II shows that,for driving ZMCC,the along-shore wind forcing is as important as the buoyancy *** that this conclusion is supported by a zero-discharge *** was also found that the buoyancy forcing varies with respect to time and space,which is due to variations of the discharge of changjiang *** addition,a particle tracking experiment shows that the substance carried by the changjiang river diluted water would distribute along the Zhe-Min coastal region during the northeast monsoon season and it may escape due to the wind relaxation.

关键词： coastal current numerical model momentum analysis changjiang river diluted water East China Sea