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http://dx.doi.org/10.5322/JES.2008.17.1.085

Temporal and Spatial Variability of Chlorophyll a in the Northern East China Sea using Ocean Color Images in Summer  

Kim, Sang-Woo (Ocean Research Team, National Fisheries Research and Development Institute)
Lim, Jin-Wook (Ocean Research Team, National Fisheries Research and Development Institute)
Jang, Lee-Hyun (Ocean Research Team, National Fisheries Research and Development Institute)
Publication Information
Journal of Environmental Science International / v.17, no.1, 2008 , pp. 85-95 More about this Journal
Abstract
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 $5mg/m^3$) 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 $122-124^{\circ}E$, 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 $9mg/m^3$, was found at the western part of $125^{\circ}E$ 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.
Keywords
East China Sea; Ocean color image; Chlorophyll a;
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