2017-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/708356摘要：本三年計畫研究重點共分五大項，第一部分為長生命的雙眼牆颱風動力探討，將利用不同複雜程度的動力模式，如淺水方程式、等熵靜力平衡模式，以及完整物理的CReSS或WRF模式研究超長生命期的雙眼牆颱風的動力過程。第二部分為颱風動力能量效率的推導與應用，將使用新推導的動力能量效率工具深入探討雙眼牆發展過程的動力問題。我們的假說是：雙眼牆的形成時，moat出現使得能量效率大幅增加。將使用動能效率診斷分析模擬資料，設計結合觀測的理想型動力渦旋實驗，探討基本動力問題；接著與雷達資料結合，討論雷達資料對於動能效率的敏感度；更廣泛地使用雲模式之模擬結果，討論軸對稱/非軸對稱颱風在其發展過程中動能效率的異同。第三部分著重於水氣有效擴散的診斷，以及應用於熱帶氣旋強度變化研究，著重撒哈拉沙漠乾空氣與沙塵暴的熱帶氣旋的診斷，繪製整合物理參數的觀測動力相位圖，並增加診斷所需的平流計算效率。第四部分為結合正壓渦度模式與垂直平均邊界層模式，探討颱風邊界層動力與自由大氣渦度動力交互作用，了解雙眼牆颱風生成時的邊界層動力的角色。第五部分是利用最新的DYNAMO實驗資料探討熱帶雙日波與中尺度對流降水、季內震盪及哈德里環流之交互作用，並進行其動能效率計算與水氣有效擴散診斷。<br> Abstract: This three year proposal contains the research of five major components: 1) long-lived concentric eyewalls (CE) typhoon dynamics, we proposed to use dynamical models of complexity hierarchy, such as the shallow water model, the primitive equations with isentropic coordinate, and the CReSS or WRF models to study the long-lived CE typhoons; 2) dynamic energy efficiency diagnosis study, we will derive dynamical efficiency to study the dynamics of CE formation. Our hypothesis is that the formation of moat is the key for the energy efficiency of the CE typhoons. We will use the idealized model, aircraft radar data, and the CReSS model output to demonstrate the usefulness of the energy efficiency in both axisymmetric and asymmetric typhoon; 3) application of effective diffusivity diagnosis to the intensity change of tropical cyclone, we will focus on the study of dry air and sandstorm around Sahara desert; 4) study of tropical cyclone boundary layer using barotropic model coupled with slab-boundary layer model. We will build up an idealized model to study the tropical cyclone boundary layer dynamics during CE formations; 5) utilizing the newest DYNAMO experiment data to study the interaction between two-day periodic rainfall pattern, mesoscale convection, interseasonal oscillations and Hadley circulation, with the aid of the effective diffusivity and energy efficiency calculations.長生命雙眼牆動力能量效率有效擴散率颱風邊界層DYNAMOlong-lived concentric eyewalls typhoondynamic energy efficiencyeffective diffusivitytropical cyclone boundary layerDYNAMO