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

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 salin...

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Bibliographic Details
Published inChina ocean engineering Vol. 25; no. 2; pp. 327 - 338
Main Author 张文静 朱首贤 董礼先 张长宽
Format Journal Article
LanguageEnglish
Published Heidelberg Chinese Ocean Engineering Society 01.06.2011
College of Physical and Environmental Oceanography, Ocean University of China,Qingdao 266100, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography,Hangzhou 310012, China%College of Ocean Engineering, Hohai University, Nanjing 210098, China%State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography,Hangzhou 310012, China
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China
Subjects
Acetal resins
China
Coastal Sciences
Computer simulation
Dilution
Engineering
Fluid- and Aerodynamics
Marine
Marine & Freshwater Sciences
Mathematical models
Numerical and Computational Physics
Ocean engineering
Ocean models
Oceanography
Offshore Engineering
POM模式
Salinity
Simulation
Technical Notes
Z坐标
垂直
应用
普林斯顿海洋模式
水稀释
混合
长江
the Changjiang diluted water
baroclinic pressure gradient
hybrid vertical coordinate
Eulerian-Lagrangian method
numerical simulation
the Chang]iang diluted water
Online AccessGet full text
ISSN0890-5487
2191-8945
DOI10.1007/s13344-011-0027-4

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Summary: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.
Bibliography:32-1441/P
ZHANG Wen-jing , ZHU Shou-xian , DONG Li-xian ,ZHANG Chang-kuan （a College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China b Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China c State Key Laboratory of Satellite Ocean Environment Dynamics, SecondInstitute of Oceanography Hangzhou 310012, China d College of Ocean Engineering, Hohai University, Nanjing 210098, China）
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.
hybrid vertical coordinate; baroclinic pressure gradient; Eulerian-Lagrangian method; the Changjiang diluted water; numerical simulation
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ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-011-0027-4