Distribution of Changjiang Diluted Water detected by satellite chlorophyll-a and its interannual variation during 1998-2007
Distribution of Changjiang Diluted Water detected by satellite chlorophyll-a and its interannual variation during 1998-2007
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DOI：
10.1007/s10872-009-0013-0
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发表时间：
2009-02-01
影响因子：
2.3
通讯作者：
Ishizaka, Joji
中科院分区：
文献类型：
--
作者：
Kim, Hyun-Cheol;Yamaguchi, Hisashi;Ishizaka, Joji
对1998-2007年东海夏季宽视场传感器(SeaWiFS)叶绿素a分布进行了分析。使用 K 均值聚类技术进行统计分析使我们能够定义指示长江稀释水 (CDW) 的适当卫星叶绿素 a 浓度。每年较高的卫星叶绿素-a浓度(> 0.48 mg m(-3))的空间分布与较低盐度的CDW(< 30-32)的分布吻合良好。由高卫星叶绿素a指示的CDW面积的年际变化与长江夏季淡水流量的年际变化相关。相关分析表明，CDW在东海向东扩散，排放后存在1~2个月的时滞。
Sea-viewing Wide Field-of-view Sensor (SeaWiFS) chlorophyll-a distribution in summer in the East China Sea during 1998-2007 was analyzed. Statistical analysis with K-means clustering technique allowed us to define the proper satellite chlorophyll-a concentration indicating the Changjiang Diluted Water (CDW). The spatial distributions of the higher satellite chlorophyll-a concentrations (> 0.48 mg m(-3)) corresponded well with the distributions of lower salinity CDW (< 30-32) every year. Interannual variation of the CDW area, indicated by the high satellite chlorophyll-a, correlated with the interannual variation of the Changjiang summer freshwater discharge. The correlation analysis indicated that the CDW spread eastward in the East China Sea with a time lag of 1 to 2 months after the discharge.