原名「台灣學術線上」
包含TAO期刊庫 + TAO書籍庫 + 論文 + 史料文獻
首頁 | 關於TAO | 瀏覽 | 進階查詢 | 參考工具 | 會員服務 | 已購專書 | RSS服務 | 電子報 | FAQ  
查詢範圍:
   
查詢模式:
熱門查詢詞:
dvd與神對話工具機 調機皮膚老化
   
   
   
     
   
 
項次 書目
1
題名:GMS地球同步衛星影像數位資料在雲分析上的應用     (38點)
The Application of GMS Digital Image Data to Cloud Analysis
著者:林博雄(Po-Hsieng Lin) ;曾忠一(Chung-Yi Tseng)
出版地區:台灣
出版城市:台北市
學科:天文學 ; 地球科學
關鍵字:地球同步衛星 ; 雲分析 ; 雲參數遙測 ; Geosynchronous satellite ; Nephanalysis ; Remote sensing of cloud parameters
刊名:大氣科學
卷期:22期3號(1994.9)
頁碼:319-337
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

傳統主觀氣象雲圖分析方法有視覺限制與錯覺,定量與自動化的雲圖分析,將可有效地組合雲特徵與數值天氣預報的產品。本文嘗試建立一套資料處理流程,以1990年6月12日0000GMT?例,結合日本GMS地球同步衛星雲圖數位資料與歐洲中期天氣預報中心(ECMWF)數值天氣網格資料,分析東亞地區梅雨鋒面雲帶、赤道對流雲簇等豐富的雲系現象。本文中首先探討紅外雲圖中臨邊昏暗現象的視角訂正問題,在LOWTRAN程式套的輔助下,求得(secθ)1/8的經驗式。經過視角訂正後的亮度溫度與反照率,再配合數值模式網格,以大約150公里見方的空間網格進行雲量、雲頂溫度與反照率平均值的計算,並以空間相干法另外再計算衛星資料網格內有雲覆蓋區的雲頂溫度。按著以方格區分法和日本氣象衛星中心的雲級分類技術,組合雲頂溫度與反照率值來討論雲型與雲級的空間分布。這些雲型、雲級相當程度地掌握到縱觀尺度雲系分布的特徵,並和ECMWF數值模式的垂直速度場有相當程度的吻合,但與對流可用位能(CAPE)的大小沒有良好的對應關係。
The traditional, visual method for satellite cloud map analysis has the problems in judgemental error and vision constraint by human eyes. Quantitative and automatical analysis of satellite cloud map can help to combine numerical weather prediction products and cloud information more efficiently. This paper attempts to outline a data analysis procedure, which uses the GMS digital data and TOGA advanced grid data from European Centre of Medium-range Weather Forecasts. The case was chosen on 0000GMT 12 June, 1990, in East Asia area. There are Mei-Yu (Baiu) frontal system, cumulus convections and cloud clusters near the equator. We first discuss the limb darkening phenomenon in infrared band and the correction algorithm. By using LOWTRAN package the correction function is found to be (secθ)1/8. After the correction stage reflectivity and brightness temperature were remapped into about 150 km square to match the ECMWF numerical dataset. Then the grid average of cloud amount, cloud top temperature and cloud reflectivity were retrieved. We also follow the spatial coherence method to compute cloud top temperature in the satellite grid area. Finally, the quantitative analyses of GMS satellite visible and infrared digital data were done in two paths. One approach is using box classifer idea which uses several intervals of cloud top temperature and reflectivity. Five cloud patterns were assigned as five interval boxes. The second approach is the same as the idea of Japan Meteorological Satellite Center. Three degrees of cloud top height were seperated and identified in the space. The spatial distribution of these cloud patterns and cloud height degree catch most synoptic features. The comparison between these cloud analyses and ECMWF vertical velocity field has a good agreement, but the convective available potential energy (CAPE) variable fails to fit these cloud analyses position.




本卷期目次
大氣科學 22期3號 (1994.9)
GMS地球同步衛星影像數位資料在雲分析上的應用/ 林博雄曾忠一
ENSO年後春季東亞大氣特性之分析-第一部份:海溫及外逸長波輻射特徵/ 王作臺胡志文
ENSO年後春季東亞大氣特性之分析-第二部份:高低層環流之特性及推論/ 胡志文王作臺
半隱式半拉格郎日法在雲模式中的應用/ 郭廷新曾忠一
1979年東亞梅雨期中低緯度大氣垂直模之結構與能量之研究/ 李汴軍
碳氫化合物組合與近地面臭氧生成/ 柳中明蔡育文左台利羅俊光劉紹臣
 
   
 
   

與TAO合作 | 隱私與版權聲明 | 聯絡方式 | 下載Adobe Reader
地址:台北市中正區(100)北平東路30-12號3樓
電話:(02)2393-6968 傳真:(02)2393-6877
Email: service@wordpedia.com
Wordpedia Family: 學校、企業版入口 | 遠流影音館
Copyright©2011 Wordpedia Co., Ltd. All Rights Reserved.