| 研究生: |
蔡玉嫈 Yu-Ying Tsai |
|---|---|
| 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 |
| 指導教授: |
潘貞杰
Chen-Jeih Pan |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
地球科學學院 - 太空科學研究所 Graduate Institute of Space Science |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 51 |
| 中文關鍵詞: | 赤道波動 、間熱帶輻合區 、克耳文波 、福衛三號 |
| 外文關鍵詞: | ITCZ, FORMOSAT-3/COSMIC, Kelvin wave, equatorial waves |
| 相關次數: | 點閱:13 下載:0 |
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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。
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.
林松錦,福衛三號IOP觀測資料對東亞地區梅雨研究的影響評估與分析應用,財團法人國家實驗研究院國家太空中心補助專題研究計畫期末報告,2006
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