THE HYDROLOGIC FEATURE IN THE CYCLONIC EDDY REGION OF THE NORTHERN EAST CHINA SEA IN THE COLD SEASONS
东海北部气旋涡区冬半年水文特征的初步分析

Some hydrologic phenomena in the cyclonic eddy region oi the Northern East China Sea in the cold seasons (October-April) are discussed in this paper on the basis of the temperature and salinity data during October 1979-April 1980. The monthly tongue shaped southeastward development of continental mixed water of the southern Huanghai Sea is a main hydrologic characteristic in the winter seasons in this region. The warm and salinic East China Sea Surface Water extending during July-October and March-May -and contracting during October-February and May-June, is closely related to the variations of both the Kuroshio and Huanghai Sea Coastal Current. Lower salinity core formed in this region is caused by the intensification of the Taiwan Warm Current which turns the direction of the Huanghai Sea Coastal Current northeastward near 33°N. The appearance of lower salinity core indicates the variation of anticyclonic circulation in the Huanghai Sea and East China Sea and makes its range contract to a great extent.