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http://dx.doi.org/10.7850/jkso.2011.16.1.001

Movement of Cold Water Mass in the Northern East China Sea in Summer  

Jang, Sung-Tae (Climate Change & Coastal Disaster Research Department, Korea Ocean Research and Development Institute)
Lee, Jae-Hak (Climate Change & Coastal Disaster Research Department, Korea Ocean Research and Development Institute)
Kim, Cheol-Ho (Climate Change & Coastal Disaster Research Department, Korea Ocean Research and Development Institute)
Jang, Chan-Joo (Climate Change & Coastal Disaster Research Department, Korea Ocean Research and Development Institute)
Jang, Young-Suk (Climate Change & Coastal Disaster Research Department, Korea Ocean Research and Development Institute)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.16, no.1, 2011 , pp. 1-13 More about this Journal
Abstract
The Yellow Sea Cold Water (YSCW) is formed by cold and dry wind in the previous winter, and is known to spread southward along the central trough of the Yellow Sea in summer. Water characteristics of the YSCW and its movement in the northern East China Sea (ECS) are investigated by analyzing CTD (conductivity-Temperature-Depth) data collected from summertime hydrographic surveys between 2003 and 2009. By water mass analysis, we newly define the North Western Cold Water (NWCW) as a cold water mass observed in the study area. It is characterized by temperature below $13.2^{\circ}C$, salinity of 32.6~33.7 psu, and density (${\sigma}_t$) of 24.7~25.5. The NWCW appears to flow southward at about a speed less than 2 cm/s according to the geostrophic calculation. The newly defined NWCW shows an interannual variation in the range of temperature and occupied area, which is in close relation with the sea surface temperature (SST) over the Yellow Sea and the East China Sea in the previous winter season. The winter SST is determined by winter air temperature, which shows a high correlation with the winter-mean Arctic Oscillation (AO) index. The negative winter-mean AO causes the low winter SST over the Yellow Sea and the East China Sea, resulting in the summertime expansion and lower temperature of the NWCW in the study area. This study shows a dynamic relation among the winter-mean AO index, SST, and NWCW, which helps to predict the movement of NWCW in the northern ECS in summer.
Keywords
Yellow Sea Cold Water; East China Sea; interannual variation; Arctic Oscillation; Yellow Sea;
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Times Cited By KSCI : 3  (Citation Analysis)
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