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KMID : 1024520080170010085
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Journal of the Environmental Sciences
2008 Volume.17 No. 1 p.85 ~ p.95
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Temporal and Spatial Variability of Chlorophyll a in the Northern East China Sea using Ocean Color Images in Summer
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Kim Sang-Woo
Lim Jin-Wook
Jang Lee-Hyun
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Abstract
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Temporal and spatial variabilities of chlorophyll a (Chl-a) in the northern East China Sea (ECS) are described, using both 8-day composite images of the SeaWiFS (Sea-viewing Wide Field-of-view Sensor) and in-situ data investigated in August and September during 2000-2005. Ocean color imagery showed that Chl-a concentrations on the continental shelf within the 50 m depth in the ECS were above 10 times higher than those of the Kuroshio area throughout the year. Higher concentrations (above ) of yearly mean Chl-a were observed along the western part of the shelf near the coast of China. The standard deviation also showed the characteristics of the spatial variability near , where the western region of the East China Sea was grater than that of the eastern region. Particularly the significant concentration of Chl-a, up to , was found at the western part of in the in-situ data of 2002. The higher Chl-a concentrations of in-situ data were consistent with low salinity waters of below 30 psu. It means that there were the close relationship between the horizontal distribution of Chl-a and low salinity water.
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KEYWORD
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East China Sea, Ocean color image, Chlorophyll a
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