2020-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/712877摘要：本計畫為「台灣區域豪雨觀測與預報實驗計畫」整合計畫中之第6個子計畫。計畫目的在配合TAHOPE觀測實驗之進行，針對鄰近臺灣之颱風(尤其是可能侵臺者)，分析伴隨颱風風場結構變化之對流及降雨特徵，探討對流過程在颱風風場結構變化中所扮演之角色。此外本計畫並將針對西北太平洋地區的颱風，分析造成颱風不對稱風場結構之綜觀環境與結(含對流)構變化之過程，探討其中之重要機制。全期計畫為期三&#63886;，此為第二年。 第一年計畫(進行中)已蒐集可用之衛星觀測資料、及各結構相關參數，客觀計算鄰近臺灣颱風之不同象限的近海表面風場。本(第二)年計畫將蒐集高解析衛星觀測與模式分析場等資料，研發利用衛星風場與模式風場、客觀分析西北太平洋颱風低層風場結構之技術，並將利用此技術分析所得之颱風風場、與TAHOPE實驗之飛機觀測颱風風場進行比較分析，探討不同環境場所伴隨之颱風對流特徵、及其與颱風風場結構變化之關係。此外計畫亦將進行高解析度數值模擬與敏感度實驗，分析不同綜觀環境場對颱風發展與結構變化之影響、及其所伴隨之對流特徵，探討對流過程與颱風結構變化兩者間之關聯及其中之物理機制；並藉由TAHOPE實驗之相關觀測資料、驗證模擬與分析結果。 <br> Abstract: This is the sixth sub-project of the integrated project “Taiwan-Area Heavy-rain Observation and Prediction Experiment (TAHOPE)”. Purpose of this project is to analyze the characteristics of convections and rainfall associated with the structure changes of typhoons located around Taiwan area, along with the TAHOPE field experiment. The role that the convections play on the structure changes of typhoons will be discussed. In addition, the environmental conditions associated with the asymmetric structure of typhoons in the western North Pacific and the processes leading to the structure changes will be analyzed. The mechanisms leading to the asymmetric structure and structure changes will be discussed. The whole project will take three years to complete and this is the second year of the project. To understand the characteristics of convectionsassociated with the structure changes of typhoons, this project will collect the oceanic wind data of all available satellite observations and the typhoon structure data (and the best track) from different operational centers, following the results of the previous project. To quantify the asymmetric structure of typhoons under different environments, the radial distribution of wind speed in different quadrants will be calculated objectively using oceanic winds . Based on the calculation results, those typhoons with significant structural changes or asymmetric structures will be further analyzed and simulated. If possible, the data collected by the field experiment will also be used. The role that the environmental conditions and convections play on the asymmetric structure and structure changes will be addressed. Results of this project will be valuable for both the scientific objectives and the planning of the field experiment of TAHOPE project.熱帶氣旋颱風結構變化颱風大小Tropical CycloneTyphoon structure changeTyphoon size