A New Hybrid Vertical Coordinate Ocean Model and Its Application in the Simulation of the Changjiang Diluted Water

Abstract：Based on the analysis of the advantages and disadvantages of some vertical coordinates applied in the calculation of the Changjiang diluted water (CDW), a new hybrid vertical coordinate is designed, which uses σ coordinate for current and σ-z coordinate for salinity. To combine the current and salinity, the Eulerian-Lagrangian method is used for the salinity calculation, and the baroclinic pressure gradient (BPG) is calculated on the salinity sited layers. The new hybrid vertical coordinate is introduced to the widely used model of POM (Princeton Ocean Model) to make a new model of POM-σ-z.The BPG calculations of an ideal case show that POM-σ-z model brings smaller error than POM model does. The simulations of CDW also show that POM-σ-z model is better than POM model on simulating the salinity and its front. ) to 作者： Author： ZHANG Wen-jing[1]  ZHU Shou-xian[2]  DONG Li-xian[3]  ZHANG Chang-kuan[2] 作者單位： College of Physical and Environmental Oceanography, Ocean University of China,Qingdao 266100, China;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China ;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography,Hangzhou 310012, ChinaCollege of Ocean Engineering, Hohai University, Nanjing 210098, ChinaState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography,Hangzhou 310012, China 期 刊： 中國海洋工程(英文版)   ISTICEISCI Journal： CHINA OCEAN ENGINEERING 年，卷(期)： 2011, 25(2) 分類號： P731.2 Keywords： hybrid vertical coordinate    baroclinic pressure gradient    Eulerian-Lagrangian method    the Chang]iang diluted water    numerical simulation    機(jī)標(biāo)分類號： P7 P4 機(jī)標(biāo)關(guān)鍵詞： Changjiang Diluted Water    Application    Ocean Model    Hybrid    salinity    POM model    baroclinic pressure gradient    advantages and disadvantages    Changjiang diluted water    hybrid    new model    analysis    BPG    better    ideal    Based    make    case 基金項(xiàng)目：

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