摘要
建立二层非线性原始方程海洋模式，采用湍流动能收支参数化风应力产生的垂直混合（夹卷），研究海洋对不同强度和最大风速半径的静止热带气旋（ＴＣ）的响应。数值试验结果表明，由于科氏参数随纬度变化，海洋对热带气旋的响应具有不对称性。热带气旋强度对海流，上混合层（ＵＭＬ）深度和海表温（ＳＳＴ）变化量值产生重大影响，并对它们变化范围影响较大。热带气旋最大风速半径对海流、混合层深度和海表温变化量值的影响不明显，但对它们的变化范围有明显影响。
A two-layer nonlinear primitive equation ocean model is developed to study the characteristics of ocean response to stationary tropical cyclones (TC). A turbulent kintetic energy budget is used to parameterize the wind stress-induced vertical mixing(entrainment). Four numerical experiments are designed with different intensities and maximum wind radia of patterns of TCs. The results of numerical calculations indicate that the ocean response is of asymmetry due to the variation of the Coriolis parameter with latitude. The intensity of the TC has a substantial impact on the changes in values of current, ML depth and SST, and effects their area changes fairly. The maximum wind radius of the TC has little influence on the value changes of current, ML depth and SST, whereas effects their area changes greatly.
基金
国家"八五"科技攻关906项目
关键词
海洋模式
夹卷
热带气旋
数值计算
Ocean model
entrainment
tropical cyclone
numerical calculation
