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基于改进的BOX模型的长江口及邻近水域水通量及水体交换特性*
引用本文:王晓红,俞志明,樊伟,宋秀贤,曹西华,袁涌铨.基于改进的BOX模型的长江口及邻近水域水通量及水体交换特性*[J].海洋与湖沼,2015,46(1).
作者姓名:王晓红  俞志明  樊伟  宋秀贤  曹西华  袁涌铨
作者单位:1. 中科院海洋研究所海洋生态与环境重点实验室 青岛 266071;2. 中国科学院大学 北京 100049;3.青岛科技大学 环境与安全工程学院 青岛 266042.,中科院海洋研究所海洋生态与环境重点实验室 青岛 266071,中科院海洋研究所海洋环流与波动重点实验室 青岛 266071,中科院海洋研究所海洋生态与环境重点实验室 青岛 266071,中科院海洋研究所海洋生态与环境重点实验室 青岛 266071,中科院海洋研究所海洋生态与环境重点实验室 青岛 266071
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);创新研究群体科学基金;国家重点基础研究发展计划(973计划)
摘    要:提要 本研究成功将水动力模型ROMS(the regional oceanic modeling system model)与箱式模型结合,详细阐述了长江口及邻近水域四个季节的水通量特征及水体交换特性,为其物质通量研究提供准确的水量基础。研究发现,总的水通量整体受季风控制,季风的重要作用在于使得水体在南北方向上交替输送,而台湾暖流对春夏季底层水体南向输运具有重要作用;直接进入123.5°E以东外海区域的水通量很少,而是先从南边界流出研究区域,然后通过海洋环流系统进入外海。长江径流是影响水体更新的重要因素,但在强烈季风下,水体更新主要依赖于季风方向的水平水通量,主要是同层水体而不是表底层水体之间的交换。所以不能简单的以水体更新时间长短作为强烈季风区底层缺氧高发与否的标准。因此,虽然水体更新时间较长的区域与缺氧区基本一致,本研究认为该区域底层水体缺氧的本质原因是跃层阻隔了表底层水体之间的交换。

关 键 词:长江口  ROMS  箱式模型  水通量  水体交换特性
修稿时间:4/2/2014 12:00:00 AM

WATER FLUX AND WATER EXCHANGE FEATURES IN THE YANGTZE RIVER ESTUARY AND THE AJACENT WATERS ON A MODIFIED BOX MODEL*1
Wang xiaohong,Yu zhiming,Fan wei,Song xiuxian,Cao xihua and Yuan yongquan.WATER FLUX AND WATER EXCHANGE FEATURES IN THE YANGTZE RIVER ESTUARY AND THE AJACENT WATERS ON A MODIFIED BOX MODEL*1[J].Oceanologia Et Limnologia Sinica,2015,46(1).
Authors:Wang xiaohong  Yu zhiming  Fan wei  Song xiuxian  Cao xihua and Yuan yongquan
Institution:institute of oceanology, chinese academy of sciences,institute of oceanology, chinese academy of sciences,institute of oceanology, chinese academy of sciences,institute of oceanology, chinese academy of sciences,institute of oceanology, chinese academy of sciences,institute of oceanology, chinese academy of sciences
Abstract:To provide an accurate water flux for material flux research in the Yangtze River estuary, the hydrodynamic model ROMS (the regional oceanic modeling system model) and the box model were combined successfully. The water flux and water exchange features have been illustrated in detail. It was found that it was the monsoon that controlled the water flux as a whole, making water being transported from north to south or from south to north alternately; while it was the Taiwan Warm currents that played an important role in the process of lower waters being transported northwards in spring and summer. The Yangtze River discharge was not dumped into the open seas east of 123.5°E directly, but was transported out of the study area across the southern boundary first and then to the open seas through the ocean current system. The Yangtze River discharge is an important factor influencing the water exchange. However, under the strong monsoon, water exchange depended more on the horizontal water flux in the monsoon direction, mainly in the same layer but not between the upper and lower layers. Therefore, it could not be judged by the flushing time solely that the anoxia in the lower layer was likely to happen or not in strong monsoon areas. Although there was a coincide of longer water exchange time and anoxia, the ultimate cause of anoxia was the spring layer that hindered the exchange between the upper and lower waters.
Keywords:The Yangtze River estuary    ROMS    box model    water flux    water exchange features
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