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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 吳俊傑(Chun-Chieh Wu) | |
dc.contributor.author | Shiang-Yi Wang | en |
dc.contributor.author | 王翔儀 | zh_TW |
dc.date.accessioned | 2021-06-13T04:32:04Z | - |
dc.date.available | 2006-07-25 | |
dc.date.copyright | 2006-07-25 | |
dc.date.issued | 2006 | |
dc.date.submitted | 2006-07-19 | |
dc.identifier.citation | Aberson, S. D., 2003: Targeted observations to improve operational tropical cyclone track forecast guidance. Mon. Wea. Rev., 131, 1613–1628.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33269 | - |
dc.description.abstract | 由於颱風強度受到許多內部動力及環境流場的影響,故不論在統計或數值模式都不容易被準確的預報。Kaplan and DeMaria (2001)將環境場和颱風本身的差異(如垂直風切)參數化後加入統計模式SHIPS (Statistical Hurricane Intensity Prediction Scheme)對颱風強度進行預報,結果發現強度預報有明顯的改進;Emanuel et al. (2004)將風切作用參數化後加入一統計模式中對颱風強度進行預報,預報結果也大幅改善,顯示水平風的垂直風切對颱風的強度和結構變化有相當程度的影響,故垂直風切的影響在強度的預報上實為一重要課題。
本研究利用TCM4 (Wang 1999, 2001)此一可設計理想實驗的複雜模式針對垂直風切對颱風強度影響的議題進行模擬,在颱風達不同強度時加入不同大小的風切,檢視颱風強度及結構的變化,結果發現同一颱風強度下,愈大的風切對颱風的破壞力愈強,使颱風出現較明顯的波數一結構並導致較強的中層增溫,這些結果與過去文獻的結論一致。 分析位渦結構和徑向流場時,在風切的作用下,大氣高層會出現內流,使環境冷空氣進入颱風中心,因此颱風高層中心降溫;對同一強度的颱風而言,愈強的風切所導致的高層內流愈強,且內流出現的時間點愈早,而強內流能帶入颱風中心的環境冷空氣愈多,冷空氣造成的高層冷卻也益加顯著,颱風的軸對稱結構也大幅地被破壞;因此,颱風中心的位渦極值大幅減弱,中心位渦極值的深度也因颱風軸對稱結構被風切由上往下被破壞(即波數一的不對稱結構由上層往下層發展)而深度愈淺。 實驗結果並沒有發現風切加入到颱風強度減弱間的時間差現象(Frank and Ritchie 2001),取而代之的是颱風強度的變化趨勢和高、低層渦旋中心的傾斜變化趨勢一致,並且落後約3 – 6小時。颱風中心的傾斜隨著時間呈現氣旋式旋轉,較弱的颱風發生傾斜的時間點較早,傾斜的程度也比較大;模擬最後颱風高、低層渦旋和環境風切作用達到平衡,使颱風中心隨高度往南方傾斜,此時環境東風風切減弱,經向上則出現北風風切的分量。這些結果顯示了颱風強度的變化和高層內流及中心傾斜有極高的相關性。 | zh_TW |
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dc.description.tableofcontents | 摘要﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒i
目錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒iii 表錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒v 圖錄﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒vii 第一章 前言﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒1 1.1 研究背景﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒1 1.2 研究動機與目的﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒6 第二章 研究工具與方法﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒9 2.1 模式介紹-TCM4﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒9 2.2 模式設定及初始化﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒13 2.3 實驗設計﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒15 第三章 模擬結果與分析﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒17 3.1 模式初始條件之敏感度測試﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒17 3.1.1 初始最大風速﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒18 3.1.2 初始最大風速半徑﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒18 3.2 控制實驗﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒19 3.3 各強度颱風對不同風切反應之結果分析﹒﹒﹒﹒﹒﹒20 3.3.1 第一級強度颱風﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒20 3.3.2 第三級強度颱風﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒23 3.3.3 第四級強度颱風﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒26 3.4 綜合分析﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒29 3.4.1 位渦變化﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒29 3.4.2 颱風中心之傾斜與互繞﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒32 3.4.3 環境風切發展與變化﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒33 第四章 總結﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒35 4.1 結論﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒35 4.2 未來展望﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒37 參考文獻﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒41 表﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒48 圖﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒﹒55 | |
dc.language.iso | zh-TW | |
dc.title | 垂直風切對颱風強度影響的機制探討 | zh_TW |
dc.title | Effects of the Vertical Wind Shear on Tropical Cyclone Intensity | en |
dc.type | Thesis | |
dc.date.schoolyear | 94-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 周仲島(Ben Jong-Dao Jou),黃清勇(Ching-Yuang Huang),李清勝(Cheng-Shang Lee),郭鴻基(Hung-Chi Kuo) | |
dc.subject.keyword | 垂直風切,增溫,傾斜,互繞,波數一,位渦, | zh_TW |
dc.subject.keyword | TCM4,vertical wind shear,Rossby penetration depth, | en |
dc.relation.page | 83 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2006-07-21 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 大氣科學研究所 | zh_TW |
顯示於系所單位: | 大氣科學系 |
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