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題 名 | Observations of Kuroshio Upwelling from Satellite and Ship Data in the Southern East China Sea=應用衛星遙測及水文觀測資料於東海海域黑潮湧昇現象之研究 |
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作 者 | 曾振德; 孫志陸; 葉素然; 陳世欽; 劉燈城; 蘇偉成; | 書刊名 | 水產研究 |
卷 期 | 16:2 2008.12[民97.12] |
頁 次 | 頁1-14 |
分類號 | 351.961 |
關鍵詞 | 黑潮湧昇; 冷渦; 海面水溫; 海洋水色; Kuroshio upwelling; Cold eddy; Sea surface temperature; Ocean color; |
語 文 | 英文(English) |
中文摘要 | 本研究利用NOAA衛星AVHRR海面水溫影像、OrbView-2衛星SeaWiFS海洋水色影像及現場水文調查資料等,綜合分析夏季時期的黑潮次表層水,於入侵東海南部陸棚區時,所形成的湧昇現象 (冷渦分佈) 及其發展過程。由連續的衛星水溫水色影像分析結果,顯示東海陸棚區的冷渦分佈型態及其涵蓋面積大小,均與船測的現場水文資料分析結果,具有顯著一致性。其中,分析SeaWiFS衛星海洋水色影像,發現黑潮湧昇區的海水葉綠素a濃度高於其周邊海域,平均值為0.61 ~ 1.31 mg/m3 。同時分析AVHRR衛星海面水溫影像,得知黑潮湧昇區的平均海面水溫為19至21度。此外,由現場CTD水文觀測資料分析結果,顯示出東海南部海域內的最高葉綠素a濃度,發生於彭佳嶼西方海域的黑潮湧昇區,約水下35 m處,其葉綠素a濃度可高達1.99 mg/m3 。且東海南部海域之次表層葉綠素a最大濃度分佈層則發生於10 ~ 60 m水深,然而於黑潮湧昇區,受海水自底層向上湧昇過程,其高濃度葉綠素a海水經常會擴展至30 m以淺的表層海域。綜合本研究分析結果,顯示利用衛星遙測獲得之海面水溫及海洋水色影像,確實可提供作為許多重要表層水文特徵(如黑潮湧昇現象及冷渦分佈等)之相關研究與分析。 |
英文摘要 | The quasi-synoptic data obtained from NOAA/AVHRR sea surface temperature (SST) imageries, OrbView-2/SeaWiFS ocean color imageries, and in-situ hydrographic data were applied to investigate the spatio-temporal distribution, of Kuroshio subsurface water and its associated the form of upwelling region (cold eddy) in the summertime. Analyses of the successive AVHRR and SeaWiFS satellite imageries concluded that the corresponding hydrographic patterns and magnitudes of the satellite-derived cold eddy distributions showed a remarkable coincident with ship-observed data. Surface chlorophyll a concentrations from SeaWiFS imageries ranged between 0.61 and 1.31 mg/m3 with higher in the Kuroshio upwelling water than in the vicinity. The sea surface temperature gradient from AVHRR imageries in the Kuroshio upwelling region ranged from 19 to 21 °C. The maximum chlorophyll a concentration of all hydrographic surveys was 1.99 mg/m3 at 35 m depth and occurred in the Kuroshio upwelling region west of the Pengchiayu Island. The subsurface chlorophyll maximum (SCM) layers were between 10 and 60 m in the southern East China Sea. However, the SCM was shallower than 30 m and usually extended to the sea surface in the Kuroshio upwelling region. Therefore, the multi-sensors imageries derived from the SeaWiFS ocean color and AVHRR SST data can be a powerful tool to identify some important hydrographic patterns, ex. the Kuroshio upwelling, and cold eddy. |
本系統中英文摘要資訊取自各篇刊載內容。