王建丰^1,2,3,4, 司广成^1,2,3,4, 于非^1,2,3,4,5
1.中国科学院海洋研究所, 山东 青岛 266071;2.中国科学院 海洋环流与波动重点实验室, 山东 青岛 266071;3.中国科学院海洋大科学研究中心, 山东 青岛 266071;4.青岛海洋科学与技术试点国家实验室 海洋动力过程与气候功能实验室, 山东 青岛 266003;5.中国科学院大学, 北京 100049

摘要:
台湾暖流携带高温高盐的大洋水体入侵到东海陆架区，其向岸分支可入侵到长江口外，对我国近海温、盐与环流产生重要影响。前人针对台湾暖流上游区域开展了大量研究，对其来源、温盐特征及入侵机制取得重要研究成果，而对台湾暖流下游，即向岸分支流轴及前锋的变化认识模糊。台湾暖流向岸分支入侵流轴及前锋的变化可能对长江口海域低氧和藻华等生态灾害的发生和分布具有重要影响，因此，开展台湾暖流向岸分支路径变化的研究具有重要的物理和生态学意义。通过分析积累的温、盐数据和潜标长时间观测，我们初步发现，台湾暖流向岸分支存在季节尺度和天气尺度的变化，流轴存在摆动，前锋的北界也存在变化，但对其详细特征和变化机制尚不清楚，需要通过进一步调查和研究予以阐明。
关键词:台湾暖流入侵路径变化机制
DOI：10.11759/hykx20181019002
分类号:P722.6
基金项目:国家自然科学基金（41706012）；中国科学院先导专项（XDA11020301）；国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目—物理海洋与气候（U1406401）

Progress in studies of the characteristics and mechanisms of variations in the Taiwan Warm Current
WANG Jian-feng^1,2,3,4, SI Guang-cheng^1,2,3,4, YU Fei^1,2,3,4,5
1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4.Laboratory for Ocean Dynamics and Climate, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266003, China;5.University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:
Carrying warm and saline water, the Taiwan Warm Current (TWC) intrudes onto the continental shelf of the East China Sea (ECS), with its inshore branch arriving at the mouth of the Changjiang river. The TWC plays a significant role in the hydrographic structure and circulation of the ECS. Substantial study has been conducted regarding the TWC's source, hydrographic structure, and intrusion mechanisms. However, few studies focus on the path and front of the TWC because of the lack of observational data. As reported in recent studies, variations in the position of the north end and intrusion path of the TWC may influence the hypoxia and phytoplankton blooms occurring at the Changjiang river mouth. Therefore, study on the variations in the path and front of TWC has physical and ecological significance. In our analyses of observed hydrographic and current data, we obtained preliminary findings regarding the seasonal and synoptic variations in the path and front of the TWC. In particular, we found that the front may undergo a meridional shift such that the path makes a zonal swing. However, details regarding the characteristics and mechanisms of these variations are still unclear. Further investigation is needed to improve our understanding of variations in the TWC, which can also facilitate studies of the mechanisms of relevant ecological disasters.
Key words:Taiwan Warm Currentintrusion pathvariation mechanisms





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