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姓名 蔡玉嫈(Yu-Ying Tsai)  查詢紙本館藏   畢業系所 太空科學研究所
論文名稱 利用福衛三號研究赤道波動現象
(Equatorial waves observed using FORMOSAT-3 GPS Occultation)
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摘要(中) 運用福衛三號(FORMOSAT-3/COSMIC)衛星在2006年8月至2008年2月的觀測資料,我們分析出赤道大氣克耳文波(Kelvin wave)於低層平流層之結構與傳播方向,以及印度地區間熱帶輻合區(intertropical convergence zone,簡稱ITCZ)南北移動的情形。在大氣克耳文波方面,由溫度變動值的變化我們可以看到,在水平方向上,赤道大氣克耳文波相位有隨時間向東傳播的現象,相速度約為2680 km/day,結果並顯示在高度19公里處,波數為一以及二的周期分別為12-17天及8-12天;在垂直方向上,赤道大氣克耳文波相位結構隨高度向東傾斜,相位隨時間向下傳播,相速度約為0.5-1 km/day,垂直波長在2006年及2007年分別為4-6公里及6-10公里。在ITCZ方面,由福衛三號衛星資料演算出的水汽含量資料發現,高水汽含量區域隨時間在緯度位置上呈現約一年的變化,分別在二月及八月時移動到最南端以及最北端。配合地面降水量及長波輻射資料對應,水汽含量資料表現了ITCZ隨時間在緯度位置變化的特性。
摘要(英) Structure and propagation of equatorial atmospheric Kelvin waves and the latitudinal migration of intertropical convergence zone (ITCZ) during August 2006 and February 2008 are observed using FORMOSAT-3/COSMIC data. Zonal Kelvin wave derived from temperature fluctuations at 19 km characterize eastward phase propagation with the phase speed 2680 km/day, the wave periods are 12-17 days for zonal wave number 1 and 8-12 days for wave number 2. The vertical structure of Kelvin wave tilts eastward with height between 18-30 km, the phase propagates downward with the phase speed 0.5-1 km/day, and vertical wavelengths are 4-6 km in 2006 and 6-10 km in 2007. Integrated water vapor derived from COSMIC data shows one year variation in time-latitude section, high value region moved to the most southern part and northern part on February and August. It shows the characteristics of the latitudinal migration of ITCZ.
關鍵字(中) ★ 赤道波動
★ 間熱帶輻合區
★ 克耳文波
★ 福衛三號
關鍵字(英) ★ ITCZ
★ FORMOSAT-3/COSMIC
★ Kelvin wave
★ equatorial waves
論文目次 中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 IX
第一章 緒論
1-1 研究回顧及介紹 1
1-2 研究動機 5
1-3 論文內容概述 6
第二章 儀器介紹與資料品質
2-1 儀器簡介
2-1.1 福爾摩沙衛星三號 7
2-1.2 TRMM衛星 12
2-1.3 NOAA衛星 14
2-2 福衛三號資料與板橋探空站資料比對 16
第三章 利用福衛三號研究赤道大氣克耳文波
3-1 資料選擇 19
3-2 溫度變化趨勢線 20
3-3 赤道大氣克耳文波之水平相位傳播 22
3-4 赤道大氣克耳文波之垂直相位傳播及結構 27
3-5 討論 31
第四章 利用福衛三號研究間熱帶輻合區
4-1 前言 35
4-2 資料選擇 36
4-3 水汽含量之演算 37
4-4 觀測結果 39
4-5 討論 43
第五章 結論 44
參考文獻 47
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指導教授 潘貞杰(Chen-Jeih Pan) 審核日期 2008-6-30
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