Distribution of Changjiang Diluted Water detected by satellite chlorophyll-a and its interannual variation during 1998-2007

• Published in: Journal of oceanography Vol. 65; no. 1; pp. 129 - 135
• Main Authors: Kim, Hyun-Cheol, Yamaguchi, Hisashi, Yoo, Sinjae, Zhu, Jianrong, Okamura, Kazumaro, Kiyomoto, Yoko, Tanaka, Katsuhisa, Kim, Sang-Woo, Park, Taewook, Oh, Im Sang, Ishizaka, Joji
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01-02-2009; Springer Netherlands; Springer Nature B.V
• Subjects: Chlorophyll; Correlation analysis; Earth and Environmental Science; Earth Sciences; Freshwater & Marine Ecology; K-means clustering; Kuroshio; Landsat satellites; Marine; Ocean color remote sensing; Oceanography; Oceans; Original Articles; Spatial distribution; Statistical analysis; Studies; East China Sea; Yangtze River; INW, Donghai Sea; INW, China, People's Rep., Changjiang Delta; Kuroshio; East China Sea; K-means clustering; Ocean color remote sensing; Yangtze River
• ISSN: 0916-8370; 1573-868X
• DOI: 10.1007/s10872-009-0013-0

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.