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頁籤選單縮合
題 名 | 以MTSAT衛星影像分析臺灣海岸地區雲覆蓋率的時空特性=Spatial and Temporal Distribution of Cloud Coverage over Taiwan Using MTSAT Satllite Images |
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作 者 | 陳蔚瑋; 張憲國; 劉勁成; | 書刊名 | 航測及遙測學刊 |
卷 期 | 18:3 2014.07[民103.07] |
頁 次 | 頁153-160 |
分類號 | 440.98 |
關鍵詞 | 衛星遙測; 雲量分布; 影像處理; 群集分析; Remote sensing; Cloud cover age; Image processing; Cluster analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以2009年至2012年四年的MTSAT衛星影像分析台灣的雲遮蓋率發現,在陸上區域的雲遮蓋率比在海上區域的高出19.5%,此結果異於往昔的海上雲量比陸上高23%的研究結論。另外比較各月份的雲覆蓋率發現, 7月份的海上與海岸地區雲覆蓋率為全年月份最低的,冬季的雲覆蓋則較夏季高,陸上區域的雲覆蓋率以4月至6月較其他月份高。一天自九時至下午四時的每小時的雲覆蓋率,以中午較高,而海上雲覆蓋率較海岸及陸上高。 本文再以高斯混合模型(GMM)及群集分析法,同時考慮時間與空間的雲覆蓋率的差異分類出台灣海岸成三群,其為高雲覆蓋率的東部海岸,雲覆蓋率較低且季節性變化較低的西南部與南部海岸,與介於兩者間的西部海岸段。本結果可提供欲以光學衛星影像進行海岸地區特性研究的可用率、以及應用至海岸生態、太陽能應用、農業養殖及國民居住環境等相關研究的參考。 |
英文摘要 | Using MTSAT stalellite images from 2009 to 2012 the spatial and temperal distribution of cloud coverage over Taiwan is investigated in this paper. More cloud coverage over lands than that over the sea by 19.5% in average is analyzed. The conclusion is different from the previous result indicating global cloud coverage over the sea exceeding that over land by 23%. Monthly averaged cloud coverage over the sea and coastal area in July is lowest among one year. Cloud coverage over three areas in the winter is higher than in the summer. Cloud coverage over land from April to June is generally higher than those in other months. Hourly variation of cloud coverage from am. 9 to pm 4 in a day shows that coverage in the noon exceeds those in other hours and that coverage over the sea exceeds that over land in a day. Gaussian Mixture Model(GMM) and cluster analysis were applied to classifying three groups of cloud coverage over coastal area condersing spatial and temperal distribution. Eastern coast has the highest coverage among three groups; southern as well as southwestern coasts has the lowest one. The results can offer good references to help some researches in other fields, such as remote sensing in coastal area, marine ecology, aquaculture, agriculture and environment of residence. |
本系統中英文摘要資訊取自各篇刊載內容。