Stokes漂流对海洋上混合层影响程度的确定方法研究

波流相互作用产生的Stokes漂流与海洋大尺度行星涡及湍流小尺度涡相互作用分别诱导Coriolis-Stokes力和Stokes-Vortex力。前者影响平均流场空间结构而后者是Langmuir环流生成的核心机制。它们直接影响着海洋上混合层内动力过程，对海气交换等有十分重要的作用。本项目拟利用湍流大涡模拟和ROMS-SWAN耦合两种模式工具，研究不同风速、海浪发展状态、背景流场、纬度、温盐等条件下，Stokes漂流与混合层深度、混合强度、混和率等的关系，量化Stokes漂流对海洋上混合层在这些不同条件下的影响，建立其影响程度的确定方法；研究非常数涡粘系数下Coriolis-Stokes力和Stokes-Vortex力各自和共同作用对Ekman层平均流及能量输入的影响；将Stokes漂流影响程度量化结果引入至海洋环流模式中，结合观测资料进行实际海区模拟，研究其对海洋模式的改进效果和应用能力。

The interaction between Coriolis force and the Stokes drift (Coriolis-Stokes force) affects the mean profile in upper ocean mixed layer. Distortion of three-dimensional turbulent vorticity by Stokes drift (Stokes-Vortex force) is the key of models for Langmuir circulation. They change the dynamics in ocean mixed layer and play a crucial role in air-sea exchange dynamics as well.We plan to use Large Eddy Simulaiton and ROMS-SWAN coupling model to quantify Stokes drift's effects on upper ocean mixed layer under different wind speed, wave condition, background current, latitute, water depth, temperature and salinity. Based on these works we will establish a method to estimating Stokes drift's effects on upper ocean mixed layer. Using this method we investigate Coriolis-Stokes force and Stokes Vortex force together or seperaterly working on mean current and energy transfer in Ekman layer with a non constant eddy viscosity. We will introduce the quantifing results of Stokes drift into circulation model, together with field observation and real ocean modeling, testing the modeling improvement and modeling application.