博碩士論文 996203016 詳細資訊




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姓名 黃鉉閒(Hsuan-Hsien Huang)  查詢紙本館藏   畢業系所 太空科學研究所
論文名稱 平流層驟暖現象與電離層電子濃度變化
(The electron density variation during Stratospheric sudden warming event observed by using FORMSAT-3/COSMIC)
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摘要(中) 早期研究發現冬天極區的平流層,溫度急遽上升數10oC後,又立刻於7天內下降為原本的溫度,稱之為平流層驟暖(stratospheric sudden warming;SSW)現象。本論文使用福爾摩沙衛星3號,觀測2007至2011年間,大氣溫度的變化。分析觀測大氣溫度參數之經度與時間的變化,發現其中之行星波結構,並透過大氣潮汐式解析溫度隨經度與時間的變化。結果出現行星波的特徵,振盪天數與增溫天數與行星波吻合,此說明了行星波為造成SSW現象的主要原因。分析福衛三號電離層電子濃度資料,發現每年平流層驟暖現象造成影響電離層的機制都不盡相同,波數為1的駐波行星波(stationary planetary wave 1;SPW1)與波數2之向西傳播半日潮(semi-diurnal westward 2;SW2)會有非線性交互作用,引發產生波數1之向西傳播半日潮(semi-diurnal westward 1;SW1),進而影響電離層電子濃度,解釋了2009年與2010年平流層驟暖現象,然而此機制似乎不適用於其餘年份。
摘要(英) Previous studies show the temperature in the stratosphere dramatically increases by 10 degrees Celsius, before eventually recovering to original values in the winter polar region, which is referred to as a stratospheric sudden warming (SSW). In this research, FORMOSAT-3/COSMIC temperature data is used to observe longitude and time variation, showing a clear SPW 1 structure during 2007-2011. The amplitude of SPW1 is large in the winter polar region and is consistent with the warming day, indicating that SPW1 is the cause of stratospheric sudden warmings. The electron density data shows that the coupling mechanism and effects of SSWs are different for each year. Nonlinear interaction between stationary planetary wave 1 (SPW1)and semi-diurnal westward 2 (SW2) generates semi-diurnal westward 1 (SW1), which propagates upward to ionosphere and affected the density variation in 2009 and 2010. This mechanism does not appear to occur in other years.
關鍵字(中) ★ 大氣層
★ 電離層
★ 平流層奏暖
關鍵字(英) ★ sudden stratospheric warming
★ ionosphere
★ atmosphere
論文目次 摘要 iv
Abstract v
致謝 vi
目錄 viii
圖目錄 ix
表目錄 xii
第一章 緒論 1
1.1 大氣層和電離層 1
1.2 研究動機 4
第二章 大氣潮汐 12
2.1 中氣層與低熱氣層 12
2.2 大氣潮汐與行星波 13
第三章 觀測儀器與資料處理分析 16
3.1 福爾摩沙衛星三號 16
3.2 資料處理分析 19
第四章 觀測結果 24
4.1 平流層驟暖現象之大氣層變化 24
4.2 平流層驟暖現象之電離層變化 33
第五章 討論與結論 43
附錄A、 大氣潮汐之振幅變化 47
附錄B、 SPW1與SPW2之大氣層與電離層振幅變化 51
參考文獻 55
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佘交堯、大韋‧庫戈,雷射誘發螢光:天空的光譜學,物理雙月刊(卅卷三期),295-320頁,2008。
指導教授 劉正彥(Jann-Yenq Liu) 審核日期 2012-7-24
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