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題 名 | 由NOAA衛星可見光資料決定氣溶膠參數=Aerosol Parameters Determined from NOAA Satellite Visible Channel Data |
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作 者 | 曾忠一; 張詔彰; 鍾明珠; 林炯明; | 書刊名 | 氣象預報與分析 |
卷 期 | 175 2003.06[民92.06] |
頁 次 | 頁1-12 |
分類號 | 328.25 |
關鍵詞 | NOAA衛星; 氣溶膠; 大氣效應訂正; NOAA satellite; Aerosol; Atmospheric corrections; |
語 文 | 中文(Chinese) |
中文摘要 | 大氣氣溶膠對地球能量收支和大氣化學過程的影響,已經由最近數十年來的研究得到證實。藉由衛星遙測技術,多年來已可對氣溶膠進行大尺度範圍的監測與研究。然而由NOAA繞極衛星上的極精密高分辨率輻射計(AVHRR)可見光頻道所觀測到的輻射強度,來源因子甚多,除了地表反射外,大致可分為因氣溶膠引起的米氏散射與空氣分子引起的雷氏散射兩種。隨著工業高度發展與人類文明活動範圍擴大,氣溶膠的來源與分布的變化更加複雜。由於衛星接收到的輻射值和氣溶膠的光程有近乎線性的關係,因此扣除空氣分子的電射散射後就可反演出氣溶膠的參數,以便了解它在大氣輻射過程所扮演的角色,進而對資源衛星影像資料的輻射訂正提供參考。本文使用輻射傳遞模式的單次散射近似解,並引入氣溶膠粒徑參數和氣溶膠光程兩個參數,對大氣氣溶膠的特性做定量與定性上的分析。最後針對臺灣及中國東南沿海的這兩個參數進行個案分析,以便對周遭環境的上層粒子源,包括海上粒子源、陸地粒子源和工業文明粒子進行追蹤了解。 |
英文摘要 | The effect of the atmospheric aerosol on the energy balance of the earth and the chemical process has confirmed by the research in recent years. The large-scale monitoring and study of the aerosol may be conducted through the use of satellite remote sensing technique. However, the radiance observed by the visible channels of the AVHRR aboard the NOAA satellites comes from many components which may consists of the Mie scattering due to aerosols and Rayleigh scattering due to air particles apart from the surface reflection. As the expansion of highly developed industry and the human activity becomes extensive, the origin and the changes of distribution of the aerosols becomes more complex than ever. Since the radiance received by the satellite and the aerosol optical thickness have nearly linear relationships, the aerosol optical thickness may be retrieved from the radiance corrected for the Rayleigh scattering and then used in assessing the role played by the aerosol in the radiative processes in the atmosphere and in the atmospheric correction of the image data of the earth resource satellite. It this paper we used the single scattering approximation and introduced the aerosol size parameter and aerosol optical thickness to perform the quantitative and qualitative analysis of aerosol characteristics. Finally we investigated these two parameters for Taiwan and Southeast China coast to understand and to trace the origins of aerosol particles at the upper level including those from the sea, land and industry. |
本系統中英文摘要資訊取自各篇刊載內容。