2017-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/712997摘要：本研究計畫之目的為研究南海與海洋大陸區域對流現象與環境西南季風間的交互作用。在每年5月中當西南季風肇始後，旺盛的水氣能夠經由西南季風從印度海越過中南半島傳至南中國海，提供南海區域對流成長所需的水氣來源。於南海發展的對流雲簇多屬於「海洋對流」型態，這些雲簇移至海洋大陸（如婆羅洲、印尼群島、菲律賓群島或臺灣島）後再轉換成「陸地對流」型態，帶來當地豪大雨甚至引發洪水造成災害。本研究計畫的重點之一，即在瞭解這些對流雲簇由西南氣流上游區的「海洋對流」型態演變成海洋大陸/島嶼的「陸地對流」型態的過程中，其雲動力過程的演變為何？其垂直潛熱剖面的變化為何？其降水效率與水收支的演變為何？本研究計畫的另一重點，在於瞭解熱帶海洋上的30-60天震盪或Madden – Julian Oscillation（簡稱MJO）如何影響本區域南海與海洋大陸區（的大範圍）水氣傳輸與輻合？透過區域模式與雲解析模式的數值模擬，本研究欲探討區域模式對於MJO的模擬能力以及雲解析模式對於水氣傳送的掌握程度。 本年度研究計畫為三年期計畫之第二年計畫。 <br> Abstract: The purpose of this project is to investigate the interaction between the southwesterly flow and deep convection over the South China Sea and Maritime Continent. In middle May, after the onset of southwesterly flow, abundant moisture is transported from the Indian Ocean across the Indo-China to the South China Sea, providing the “fuel” for the development of deep convection. Over the South China Sea, most cloud clusters belong to the regime of oceanic convection. When these cloud clusters move to the Maritime Continent (including the Indonesia, Borneo, Philippines, and Taiwan islands), these convective systems evolve into the type of continent convection, resulting in heavy rainfalls which cause severe flooding and even landslide or mudslide. One of the research objectives is to understand: when the cloud clusters evolve from maritime convection into continental convection, how do the precipitation efficiency and water cycle change in association with the convection regime shift? How do the cloud dynamical processes change? What are the changes of the vertical profiles of hydrometeors and latent heating/cooling? The other objective of this project is to investigate how the 30-60 day oscillations or the Madden-Julian Oscillations (MJOs) affect the large-scale moisture transport and convergence in the South China Sea and Maritime Continent? Through the numerical simulations of regional model and cloud-resolving model, this project is aim at examining the capability of regional model to simulate the MJO and the ability of the cloud-resolving model to simulate the moisture transport. This year’s project is the second year of the three-year project.水收支降水效率MJO對流雲簇Water BudgetPrecipitation EfficiencyMJOCloud Cluster