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相關文獻
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頁籤選單縮合
題 名 | 利用AVHRR和OCI資料求取大氣中的氣溶膠參數=The Determination of Aerosol Parameters using the OCI and AVHRR Data |
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作 者 | 鍾明珠; 曾忠一; | 書刊名 | 氣象預報與分析 |
卷 期 | 179 2004.06[民93.06] |
頁 次 | 頁11-20 |
分類號 | 440.98 |
關鍵詞 | 衛星; 大氣; 氣溶膠; OCI; Aerosol; AVHRR; |
語 文 | 中文(Chinese) |
中文摘要 | 1999年1月27日發射升空的中華衛星一號,它所酬載的海洋水色照相儀OCI和NOAA衛星所酬載的AVHRR輻射計,有兩個頻道其觀測波段部分重合;分別為AVHRR的第一頻道與海洋水色照相儀的第5頻道,AVHRR的第2頻道與海洋水色照相儀OCI的第6頻道。它們分別位於可見光近紅外光波段,適合量測大氣中的氣溶膠。 本研究用來量測大氣中的氣溶膠模式是採用Durkee(1991)等人於研究中所建立的模式。該模式是利用衛星所接收到的輻射量在可見光至近紅外光波段間會與大氣氣溶膠光程近乎線性關係,且藉由AVHRR的第1頻道和第2頻道兩波段推演出S12氣溶膠粒徑參數,得到小尺寸的氣溶膠(粒徑≦0.5μm)對S12氣溶膠粒徑參數的影響很明顯,也就是說S12氣溶膠粒徑參數對小尺寸氣溶膠的敏感度較大尺寸為高。將海洋水色照相儀的衛生資料代入上述的氣溶膠模式,計算臺灣附近海域的氣溶膠光程和S12氣溶膠粒徑參數。計算出來的結果顯示:利用海洋水色照相儀OCI的衛星資料也可量測大氣中的氣溶膠光程,唯其值較利用AVHRR衛星資料所計算出的值低;而經由模式計算出來的S12氣溶膠粒徑參數也是相同的情形。 |
英文摘要 | The ocean color imager (OCI) aboard the ROCS at 1 launched on 27 January 1999 has two channel overlapped with the channels of the AVHRR on the NOAA satellites. These two channels are located in the visible and near infrared region, which are suitable for measuring the aerosol content in the atmosphere. In this research we used a model proposed by Durkee to investigate the aerosol parameters, including optical thickness and size parameter. The model uses the nearly linear relationships between the radiances received by the satellite and the aerosol optical thickness in the visible and near infrared spectrum, so that the optical thickness may be retrieved from the satellite data corrected for the Rayleigh scattering. It is found that the S12 aerosol size parameter is more sensitive to small size than to the large size for the region near Taiwan area. From this study we find that the optical thickness may also be retrieved from the OCI data, that is, the OCI may monitor effectively the amount and change of aerosol content. However, the values are lower than those obtained by the AVHRR. It is the same for the case of size parameter mentioned above. |
本系統中英文摘要資訊取自各篇刊載內容。