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一、前言由于海浪本身的随机性,描述海波运动的最合理逻辑的方式应当是能量或它在波数(或频率)空间中的分布这样的统计特征量。基于能量平衡的现代海浪预报方法的发展取决于我们对以下两方面知识的深化: Ⅰ)海波能(或海波能谱)的输入和消衰机制; Ⅱ)海波能(或海波能谱)在物理空间中和在波数相空间中的传播机制,以及计算机和计算技术的发展。人们根据自己对以上诸方面认识的不断深化,在不同的年代提出了一代又一代的海浪数值预报模式。40—50年代建立在Jefferets机制和总能量(特征波高)平衡方程基础上的Sverdrup-Munk方法是典型的第一代海浪数值预报模式。 相似文献
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DETERMINATION OF GEOSTROPHIC FLOW BY APPLYING THE PRINCIPLE OF MINIMUM ENERGY AND THE INVERSE METHOD
This article gives a computing method to calculate the geostrophic current. The fact that kinetic energy of geostrophic motion and geostrophic potential energy reach minimum simultaneously, Fomin's "principle of minimum kinetic energy" is equivalent to the principle of minimum geostrophic potential energy . We concluded that horizontal geostrophic velocities at different depths are along the same direction . Combining our method with C. Wunsch's inverse method we can obtain the velocity components along and normal to the hydrographic sections . We used and analysed CTD and current meter data of " Experiment No . 3 " exploration, December 1985-January 1986, in the west Pacific Ocean - Philippine area. 相似文献
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