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浪致混合效应的耦合模式模拟

发表时间:2017-06-30  浏览量:95  下载量:11
全部作者: 张文清,管长龙
作者单位: 中国海洋大学海洋与大气学院
摘 要: 在海−气−浪−沉积输运耦合模式(the coupled ocean-atmosphere-wave-sediment transport modeling system, COAWST)中,添加波生运动混合作用的参数化方案,并对台风过程中的海浪破碎和波生运动两种不同机制的浪致混合作用进行理想数值实验,初步探讨海洋对台风的响应情况以及两种不同浪致混合机制在COAWST中的表现。数值实验表明,考虑海浪破碎、波生运动的混合作用均能让全场平均海表温度模拟结果降低,混合层深度增深,湍动能(turbulence kinetic energy,TKE)、湍黏性系数(viscosity coefficient,VC)和湍耗散率增加。波生运动能够有效地将湍动能向深处传递,增强上层海洋的混合。海浪破碎和波生运动的浪致混合作用的参数化方案及其在k-ω湍混合方案中的嵌入形式具有可行性。
关 键 词: 物理海洋学;浪致混合;海浪破碎;波生运动;COAWST
Title: Numerical simulation of the wave-induced mixing in the coupled model
Author: ZHANG Wenqing, GUAN Changlong
Organization: College of Oceanic and Atmospheric Sciences, Ocean University of China
Abstract: In this paper, the parameterized schemes of the mixing due to turbulence generated by wave-induced motion is added to the coupled ocean-atmosphere-wave-sediment transport modeling system (COAWST). The wave breaking and wave induced motion on the mixing under the condition of hurricane are investigated by idealized cases. Then the response of ocean to hurricane and the performance of COAWST which contains these two different wave-induced mixing mechanisms are discussed. In these idealized cases, the sea surface temperature will be decreased, and the mixed layer depth, turbulence kinetic energy (TKE), viscosity coefficient (VC) and dissipation of TKE will be increased if the effects of the wave breaking and wave-induced motion on the mixing are considered. Wave-induced motion can effectively transfer the turbulent kinetic energy to the deeper ocean and enhance the mixture of the upper ocean. Furthermore, the parameterized schemes of mixing due to turbulence generated by wave breaking and wave-induced motion which are embedded in the k-ω turbulent mixing scheme are feasible.
Key words: physical oceanography; wave-induced mixing; wave breaking; wave-induced motion; COAWST
发表期数: 2017年6月第12期
引用格式: 张文清,管长龙. 浪致混合效应的耦合模式模拟[J]. 中国科技论文在线精品论文,2017,10(12):1407-1415.
 
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