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研究生： 林伯東
論文名稱： 東亞地區降水特性的季節變化
Seasonal Variation of Rainfall Chatacteristic over East Asia
指導教授： 曾莉珊
Tseng, Li-Shan
周佳
Chou, Chia
學位類別： 碩士
Master
系所名稱： 地球科學系
Department of Earth Sciences
論文出版年： 2011
畢業學年度： 99
語文別： 中文
論文頁數： 73
中文關鍵詞： 季節定義 、東北-西南走向 、頻率 、強度 、持續時間 、季節變化
論文種類： 學術論文
相關次數： 點閱：140  下載：16 
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    • 本研究將根據Chou et al. （2009）之季節定義－包括第一濕季及第二濕季（濕季）、春季及秋季（過渡季）及冬季－探討全年皆存在於東亞-西北太平洋地區之東北-西南走向的多雨區降水特性之季節變化。
    降水頻率部分，冬季及過渡季之弱降水發生頻率較濕季高，而強降水之發生頻率則較濕季低。而在降水平均強度部分，所有百分位數皆呈現濕季有較強之強度，而乾季及過渡季則較弱。另外，濕季強降水及極端降水事件對應之平均上升運動較強，而冬季則較弱，春季接近於冬季，但秋季卻接近於濕季且強度幾乎相當。強降水之持續時間結果顯示春季及冬季之強降水事件持續時間較短，而濕季較長。
    探討造成季節變化之原因，吾人分析後認為，在兩濕季及乾季，可降水量對於強降水及極端降水降水強度之季節變化影響較垂直運動大，但在過渡季節則不明顯。若探討各季節降水強度之改變，可降水量之貢獻遠不及垂直運動，而垂直運動則是由趨向於不穩定之溫度結構貢獻而來。

    摘要 I 誌謝 II 目錄 IV 圖表目錄 VII 第一章前言 1 1.1 東亞地區氣候相關研究 1 1.2 影響降水的因素及降水特性相關研究 3 1.3 研究動機 6 第二章資料與方法 8 2.1 資料來源 8 2.1.1 降水資料 8 2.1.2 其他相關物理量 8 2.2 分析方法 9 2.2.1 季節及區域選取 9 2.2.2 Bin Method 9 2.2.3 降水持續時間之計算 10 第三章東亞地區各季節之氣候特徵 12 3.1 季節氣候狀態概述 12 3.1.1 春季 12 3.1.2 第一濕季 13 3.1.3 第二濕季 13 3.1.4 秋季 14 3.1.5 冬季 14 3.2 季節降水分布 15 3.2.1 春季 15 3.2.2 第一濕季 15 3.2.3 第二濕季 16 3.2.4 秋季 16 3.2.5 冬季 17 3.3 小結 17 3.3.1 大尺度環境 17 3.3.2 降水分布 18 第四章降水特性的季節變化 19 4.1 降水頻率 19 4.1.1 TRMM 19 4.1.2 CFSR 19 4.1.3 比較 20 4.2 強降水之平均強度 20 4.2.1 TRMM 20 4.2.2 CFSR 21 4.2.3 比較 21 4.3 季節大氣特性 22 4.3.1 垂直運動 22 4.3.2 可降水量 24 4.3.3 溫度 25 4.4 降水持續時間 26 4.4.1 平均降水持續時間 26 4.4.2 持續時間與發生頻率 27 第五章討論與結論 28 5.1 季節降水特性與大尺度環境的關係 28 5.1.1 春季 28 5.1.2 第一濕季 28 5.1.3 第二濕季 29 5.1.4 秋季 30 5.1.5 冬季 30 5.2 降水季節變化與大氣環境 31 5.2.1 兩濕季 31 5.2.2 乾季及過渡季 31 5.2.3 討論 31 5.3 降水強度與大氣環境 33 5.3.1 垂直運動與溫度之關係 33 5.3.2 大氣特性與降水強度之間的關係 33 5.3.3 討論 33 5.4 結論 34 參考文獻 35 圖表 40

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