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http://dx.doi.org/10.7780/kjrs.2007.23.4.323

Monitoring the Coastal Waters of the Yellow Sea Using Ferry Box and SeaWiFS Data  

Ryu, Joo-Hyung (Ocean Satellite Research Group, Korea Ocean Research & Development Institute (KORDI))
Moon, Jeong-Eon (Ocean Satellite Research Group, Korea Ocean Research & Development Institute (KORDI))
Min, Jee-Eun (Ocean Satellite Research Group, Korea Ocean Research & Development Institute (KORDI))
Ahn, Yu-Hwan (Ocean Satellite Research Group, Korea Ocean Research & Development Institute (KORDI))
Publication Information
Korean Journal of Remote Sensing / v.23, no.4, 2007 , pp. 323-334 More about this Journal
Abstract
We analyzed the ocean environmental data from water sample and automatic measurement instruments with the Incheon-Jeju passenger ship for 18 times during 4 years from 2001 to 2004. The objectives of this study are to monitor the spatial and temporal variations of ocean environmental parameters in coastal waters of the Yellow Sea using water sample analysis, and to compare and analyze the reliability of automatic measurement sensors for chlorophyll and turbidity using in situ measurements. The chlorophyll concentration showed the ranges between 0.1 to $6.0mg/m^3$. High concentrations occurred in the Gyeonggi Bay through all the cruises. The maximum value of chlorophyll concentration was $16.5mg/m^3$ in this area during September 2004. The absorption coefficients of dissolve organic matter at 400 nm showed below $0.5m^{-1}$ except those in August 2001 During 2002-2003, it did not distinctly change the seasonal variations with the ranges 0.1 to $0.4m^{-1}$. In the case of suspended sediment (SS) concentration, most of the area showed below $20g/m^3$ through all seasons except the Gyeonggi Bay and around Mokpo area. In general SS concentration of autumn and winter season was higher than that of summer. The central area of the Yellow Sea appeared to have lower value $10g/m^3$. The YSI fluorometer for chlorophyll concentration had a very low reliability and turbidity sensor had a $R^2$ value of 0.77 through the 4 times measurements comparing with water sampling method. For the automatic measurement using instruments for chlorphlyll and suspended sediment concentration, McVan and Choses sensor was greater than YSI multisensor. The SeaWiFS SS distribution map was well spatially matched with in situ measurement, however, there was a little difference in quantitative concentration.
Keywords
Ferry box; SeaWiFS; Yellow Sea; Chlorophyll; Suspended sediment; Dissolved organic matter;
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