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研究生：	陳冠杰
論文名稱：	秋季熱帶氣旋能量之年代際變化探討
指導教授：	鄒治華
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：	2010
畢業學年度：	98
語文別：	中文
論文頁數：	64
中文關鍵詞：	年代際、秋颱、能量
論文種類：	學術論文
相關次數：	點閱：159 下載：20
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本研究分析1945~2007年西北太平洋地區秋季颱風活動的變化，經過11年滑動平均後，秋強颱具有明顯的年代際(Interdecadal)變化。比較非活躍期(1973~1982年)和活躍期(1987~1996年)的結果顯示，活躍期颱風生成個數較多，發展成強颱的比例也較高，秋強颱生成位置往東西方向延伸，平均生命史較非活躍期長。
本文利用擾動能量的角度，將擾動能量形式分解成高頻率擾動(10天以下)和低頻率擾動(10~90天)，推導高頻率擾動動能收支方程式，進而探討兩時期秋季熱帶氣旋和低頻擾動，以及熱帶氣旋和平均流之間的能量轉換。研究結果發現，活躍期海溫的增暖往東西方向延伸，低層大尺度氣旋式異常環流和西風異常，使綜觀尺度擾動和平均流之間的能量轉換(CKM)、低頻振盪與綜觀尺度擾動之間的能量轉換(CKW)，以及擾動斜壓能量轉換都增強，有利於擾動的成長和颱風的生成。
CKM項的訊號主要是在中、低層，和過往的研究所提到的情形相似，CKW項的訊號則主要是在高層，之前甚少有文獻探討。在中太平洋地區(5°~15°N,160°E~180°)，不論活躍期還是非活躍期，主要的貢獻都來自於CKW項，而活躍期熱帶氣旋生成位置往東延伸，可能與高層CKW和低層CKM均增強有關。在西太平洋地區(5°~15°N,120°~140°E)，CKW和CKM都比中太平洋的能量轉換來得大，兩者均非常重要。活躍期熱帶氣旋生成位置往西延伸，可能和此區的CKW向下延伸至中、低層有關。

誌謝 ------------------------------------------------------I
摘要 -----------------------------------------------------II
目錄 -----------------------------------------------------IV
圖表說明 --------------------------------------------------V

一、前言 ------------------------------------------------- 1
二、資料 ------------------------------------------------- 7
三、擾動動能收支方程式推導 ------------------------------- 8
四、秋颱統計結果分析 -------------------------------------12
   4.1 WNP秋颱數目統計分析 -------------------------------12
   4.2秋颱生成位置與通過頻率 -----------------------------15
   4.3秋颱生命史 -----------------------------------------17
五、活躍期與非活躍期之環境場比較 -------------------------18
六、能量結果分析 -----------------------------------------22
   6.1擾動動能分析 ---------------------------------------22
   6.2正壓能量轉換各項貢獻 -------------------------------26
七、結論與討論 -------------------------------------------34

參考文獻 -------------------------------------------------39
附圖表 ---------------------------------------------------43
附錄 -----------------------------------------------------64
                                

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