| 摘要: |
| 建立了一个包含潮流作用的准定常海冰动力学模式，利用实测风资料和计算的潮流场对辽东湾中部的冰块漂移过程进行数值模拟，模拟的冰块漂移过程和实况基本一致。表明模式具有反映冰漂移过程动力特征的能力。通过对各动力因子的数值试验，说明引入潮流作用的必要性，并分析了各动力因子在冰漂移过程中的作用。 |
| 关键词: 海冰漂移过程 潮流效应 |
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| NUMERICAL SIMULATION AND TESTS OF SEA ICE DRIFT PROCESS IN THE BOHAI SEA |
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Wang Renshu1, Liu Qinzheng1, Chen Weibin1, Jin Hongtai1, Liu Cunhou2
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1.National Marine Environmental Monitoring Center, Dalian 116023;2.Offshore Structural Inspection Company, Bokai Oil Corporation of CNOOC, Tanggu 300456
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| Abstract: |
| On the basis of the natural geographic condition of the Bohai Sea a dynamic sea ice model is developed that differs from previous dynamic sea ice models in the momentum balance forces that determine the drift process of sea ice. In the model the water stress is considered to be the tidal current force, and tidal current changes periodically in both the speed and the direction. The simulated movement of sea ice floe in the Bohai Sea are agreed with observational data. It has been shown that the model can reconstruct the essential characteristics of sea ice floes movement in the Bohai Sea.
Sensitivity tests carried out to gain understanding of the effects of various forces on sea ice movement showed that the effect of each force on sea ice movement is different. The wind force is one of the driving forces of sea ice movement, so the wind force is very important in the long distance drift of sea ice. Though tidal current is periodic, its effect on the sea ice movement cannot be neglected, specially for determining the speed and direction of sea ice floe at all times in the Bohai Sea. The effect of the internal ice stress and Coriolis force on sea ice movement are less than that of the wind and tidal current. The internal ice stress decreases the speed of sea ice floe movement. The Coriolis force changes the direction of sea ice movement. |
| Key words: Sea ice drift process, Effect of tidal current |
