Distribution of Changjiang Diluted Water detected by satellite chlorophyll-a and its interannual variation during 1998-2007
2009
Kim, Hyun-Cheol | Yamaguchi, Hisashi | Yoo, Sinjae | Shu, Ken'ei | Okamura, Kazumaro | Kiyomoto, Yoko | Tanaka, K (Katsuhisa) | Kim, S-W (Sang-Woo) | Park, Taewook | Oh, Im Sang | Ishizaka, Joji
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.
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