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观测显示夏季黄海和东海存在强温跃层,同时存在强内潮和内孤立波。考虑内潮和内孤立波的混合作用对于黄海和东海夏季温跃层以及环流的模拟工作是重要的,本文使用POM数值模式,设计了一组对照实验,在考虑风场和不考虑风场的强迫作用下,分别使用Mellor-Yamada混合方案和本文提出的内波混合参数化方法,对8月份的黄海和东海温度的垂直结构进行模拟。数值模拟结果表明,Mellor-Yamada二阶湍流混合方案主要反映风场对上层海洋的混合作用,对于内波引起的混合作用反映较差;内波混合参数化方法主要考虑内潮和内孤立波的混合作用,兼顾风场和底摩擦的混合作用,模拟结果较为理想。
Abstract：Observations show that there exist strong thermocline,as well as internal tidal waves and internal solitary waves in the Yellow Sea and East China Sea in summer.It is important to consider the mixing effect of internal tidal wave and internal solitary wave when the thermocline and circulation in the East China Sea are studied.Based on the POM mode,two numerical experiments with wind forcing and without wind forcing are designed respectively.In both cases,Mellor-Yamada's second moment turbulence closure mixing scheme and internal wave mixing scheme are applied to simulate the thermocline in the Yellow Sea and East China Sea in august respectively,and the results of two mixing scheme are compared.The simulation results indicate that Mellor-Yamada second moment turbulence closure mixing scheme mainly reflects the influence of wind mixing in the upper ocean of continental shelf,but lacks in the reflection of internal wave mixing.Internal wave mixing scheme mainly considers internal tides and internal solitary waves,and partly considers wind and bottom friction mixing.The simulation result is in good agreement with the observation by using the internal wave mixing scheme.
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基本信息:
DOI：10.16441/j.cnki.hdxb.2013.08.002
中图分类号:P731.2
引用信息:
[1]王真,范植松,司宗尚,等.内波混合方法与Mellor-Yamada混合方案在黄海和东海夏季温跃层模拟中的比较研究[J],2013,43(08):8-14.DOI:10.16441/j.cnki.hdxb.2013.08.002.
基金信息:
国家自然科学重点基金项目(41030855)资助