氣候動力學理論

(Climate Dynamics Theory)

積雲對流-輻射-大尺度環流交互作用是熱帶大氣動力學核心議題。我們的研究嘗試以 "對流準平衡" (convective quasi-equilibrium)架構為基礎,結合氣候模式模擬、大氣-海洋再分析資料、無線電探空、衛星觀測等 ,探討不同垂直結構積雲對流在能量和水氣輸送所扮演角色,以及對輻射平衡影響,最終將發展或改進一套適用於描述熱帶氣候變化和低頻氣候震盪之濕大氣動力學模型

Interactions between cumulus convection, radiation and large-scale circulation is the core of tropical atmospheric dynamics. Based on the "convective quasi-equilibrium" framework, along with climate model simulation and observational truth from reanalysis atmosphere-ocean data, radiosonde and satellite soundings, we examine the roles of conveciton of various vertical structures in transporting energy and moisture, as well as the impact on radiation balance. We eventually aim to to develop or improve a moist atmospheric model applicable for the study of tropical climate changes and low-frequency climate oscillaitons.

 

低頻氣候震盪

(Low-frequency Climate Oscillations)

低頻氣候變異對諸多社會面(能源、農業、漁業、水資源、環境品質)有顯著衝擊。我們的研究嘗試探討"馬登-朱利安震盪"、"聖嬰/南方震盪"以及"太平洋年代震盪"等自然低頻氣候震盪之時空分佈特徵和維持機制,以及上述低頻氣候震盪在全球暖化下之可能變化,以及對區域氣候和天氣之影響。

Low-frequency climate oscillations impose significant impacts on various social aspects, such as energy, agriculture, fishery, water resource and environment quality. We aim to explore the space-time features and maintenance mechanisms of natural low-frequency climatet oscillations, including Madden-Julian Oscillation (MJO), El Nino/Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO). We also project their possible changes under global warming as well as their impacts on regional climate and weather. 

 

颱風-氣候系統交互作用

(Typhoon-Climate System Interactions)

颱風(熱帶氣旋)是地球上最大、最強的災害天氣系統,每年西北太平洋海域平均生成26颱風,是世界上颱風最活躍的地區。瞭解大氣和海洋環境條件如何控制颱風活動,是掌握颱風季節預報的關鍵,也有助於釐清全球暖化下,西北太平洋海域颱風頻率、強度、路徑之可能變化。

Tropical cyclone (TC) is the most powerful and devastating natural weather system on earth. Each year, about 26 TCs occur over the western North Pacific (WNP) basin. Understanding how the atmospheric and oceanic environment conditions control TC activity is the key leading to a skillful seasonal TC activity forecast. It also helps illucidate how the frequency, intensity and track of TCs over the WNP might change under the influence of anthropogenic greenhouse warming.