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    馬翱慧,劉湘南,李婷,劉美玲.南海北部海域葉綠素a濃度時空特征遙感分析[J].海洋學報,2013,35(4):98-105
    南海北部海域葉綠素a濃度時空特征遙感分析
    The satellite remotely-sensed analysis of the temporal and spatial variability of chlorophyll a concentration in the northern South China Sea
    投稿時間:2012-05-24  修訂日期:2013-02-02
    DOI:10.3969/j.issn.0253-4193.2013.04.012
    中文關鍵詞:  南海北部海域  MODIS  葉綠素a濃度  時空變化
    英文關鍵詞:northern South China Sea  MODIS  chlorophyll-a concentration  temporal and spatial variability
    基金項目:國家自然科學基金(U0933005);中央高?;究蒲袠I務費專項資金資助(2012014)。
    作者單位E-mail
    馬翱慧 中國地質大學(北京) 信息工程學院, 北京 100083  
    劉湘南 中國地質大學(北京) 信息工程學院, 北京 100083 liuxncugb@163.com 
    李婷 中國地質大學(北京) 信息工程學院, 北京 100083  
    劉美玲 中國地質大學(北京) 信息工程學院, 北京 100083  
    摘要點擊次數: 5227
    全文下載次數: 18762
    中文摘要:
          利用2007-2010年MODIS的L2級葉綠素a濃度產品作為數據基礎, 對葉綠素a濃度年平均和月平均數據進行分級分區處理, 研究南海北部海域葉綠素a濃度時空分布特征及其與海洋環境因素的關系。初步研究結果表明:2007-2010年在南海北部海域葉綠素a濃度的高值區(>5.0 mg/m3)主要分布在廣東省沿岸河流的入??? 分布范圍在夏季最大, 在春秋次之, 在冬季最小;葉綠素a濃度的次高值區(1.0~5.0 mg/m3)主要分布在海岸線到50 m等深線之間的海域, 分布范圍夏冬較大, 能擴展到50 m等深線附近, 而春秋較小, 會退縮到50 m等深線以內;葉綠素a濃度的中值區(0.3~1.0 mg/m3)主要分布在50 m到100 m等深線之間的海域, 時空變化復雜;葉綠素a濃度的低值區(<0.3 mg/m3)主要分布在100 m等深線以外的海域, 其區域平均值夏季最低, 春秋次之, 冬季最高, 同時該區域葉綠素a濃度在春夏秋三季空間分布較均勻, 而冬季受季風和黑潮入侵影響空間分布較為復雜。南海北部海域海表葉綠素a濃度的時空變化特征與季風、沿岸河流、海流、海表溫度等海洋環境因素的變化有關。
    英文摘要:
          The temporal and spatial distribution of a chlorophyll a (Chl-a) concentration in the northern South China Sea (NSCS) and its relationship with marine environmental factors were studied based on the annually and monthly mean images (January 2007 to December 2010) of the Chl-a concentration, which were obtained from the MODIS chlorophyll a concentration Level 2 products, then classified into seven regions based on the isobaths and divided into six grades. The preliminary results showed that during 2007-2010 in the NSCS, the highest value area(>5 mg/m3) of Chl-a concentration was mainly distributed in Guangdong coastal estuaries, and the biggest in summer, followed in spring and autumn, the smallest in winter; The second highest value area(1.0~5.0 mg/m3) of the Chl-a concentration was mainly in the waters between coastline and 50m isobaths. The distribution range of Chl-a concentration in summer and winter was larger, extending to the vicinity the 50 m isobath, smaller in spring and autumn, keeping within 50 m isobath; the mid-value area(0.3~1.0 mg/m3) of the Chl-a concentration mainly distrubuted between 50 and 100 m isobath with complex temporal and spatial variation; the low value area(<0.3 mg/m3) of the Chl-a concentration distributed basically in the waters beyond the 100 m isobath, where the regional average of monthly mean Chl-a concentration was the lowest in summer, followed by spring and autumn, the highest in winter, and where the spatial distributions of the Chl-a concentration were homogeneous in spring, summer and autumn, but due to the monsoon and the intrusion of Kuroshio, became more complex in winter. The temporal and spatial features of the Chl-a concentration in the NSCS were affected by the variations of the marine environmental factors, such as monsoon, coastal rivers, ocean currents, sea surface temperature, etc.
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