2008-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/705379摘要：本子計畫之重點在於中尺度激烈天氣系統的動力研究，在未來兩年內，將針對以下三個方向：（1）局部高層輻散場激發中尺度劇烈對流之探討：我們觀察到深對流的前緣常伴隨著局部區域的輻散場，因此想要探討此局部輻散場與深對流發展的關係，這部分模式工作也將和UCLA Fovell教授合作。（2）強旋轉流場下的濕對流發展與颱風強度變化的關係：颱風渦旋所伴隨的強旋轉會產生帶狀化的拉伸效應，而產生單一分散的對流胞，我們想要探討颱風渦旋對於對流系統發展的影響。（3）二維亂流以及能量頻散和不穩定度間的關係：持續探討雙眼牆形成動力，非絕熱加熱會激發出慣性重力波，慣性重力波能量頻散將會移除不穩定系統中的能量，從而減緩正壓不穩度的釋放，我們計畫將進一步探討重力波和渦旋不穩定度間的關係，我們也將探討羅士比波非線性的能量頻散。以上三個方向所涉及的論文都是國際上一些很新的研究工作，引用的論文有的方發表，有的則尚在審查或印刷當中，目的是希望能深入&#63930;解豪雨發生的原因，了解豪雨過程和颱風渦旋的交互作用，建&#63991;豪雨系統生命期包括形成、發展、維持、以及消散過程之物&#63972;特徵，作為&#63849;值模式&#63851;&#63849;化所需&#63851;&#63849;設定的基礎，以期能有效改善現有定&#63870;&#64009;雨預報能&#63882;。<br> Abstract: We propose to work in the following three areas which related to the dynamics of the severe weather. (1) The impact of local upper level divergence on the development of the new convections. This local divergence in the upper level may stem from the undiluted air mass from the boundary layer. We will use a cloud model to simulate the dynamics. This portion of work will collaborated with Prof. Fovell of UCLA. (2) We propose to study the mesoscale convective systems in the vortex environment under strong and weak strain and rotational effects. The development of the systems are important for development and intensification of tropical cyclones. The upscale transfer of energy from the convective systems in the cyclone environment may also be crucial to the genesis and intensification of TCs. (3) We will investigate the typhoon vortex dynamics in the framework of the two-dimensional turbulence. In particular, we will study the formation of the concentric eyewalls; the energy dispersion by Rossby waves and by the inertial gravity waves. We will study the vortex dynamics with instability in the presence of the strong energy dispersion.帶狀化能量頻散局部輻散場vortexenergy dispersionfilamentation dynamics