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利用东海陆架北部泥质区（济州岛西南）及其周围不同季节５个航次的悬浮体资料和相应的底质粒度资料，对该泥质区沉积动力过程的季节性变化规律进行了分析。结果表明：东海陆架北部悬浮体的高含量区并不与该区的沉积中心（泥质区）相吻合，泥质区的形成需有物源的充沛供应和涡旋的动力效应相结合。泥质区沉积作用时空变化具有强烈的季节性。冬季泥质区悬浮体供应充足，涡旋中心向泥质区东南扩展，是本区接受悬浮体沉积的关键季节。夏、秋二季泥质区的大部分区域缺少悬浮体物源，涡旋中心向北退缩，致使泥质区沉积作用强度降低，并且主要影响泥质区的西北区域。春季泥质区沉积作用强度和影响范围大于夏、秋两季，但小于冬季。
Based on the data of suspended sediment and corresponding sediment size data from the northern shale area of the East China Sea shelf (southwest of Jeju Island) and its five seasons in different seasons, the seasonal variation of sediment dynamic process in the shady area was analyzed. The results show that the high content of the suspended matter in the northern East China Sea Shelf does not coincide with the sedimentary center (muddy area) of the East China Sea Shelf. The formation of the muddy area needs the combination of abundant supply of source material and the dynamic effect of vortexing. The temporal and spatial variations of sedimentary facies in the shady area are strongly seasonal. In winter, there is sufficient supply of suspended matter in the muddy area and the vortex center expands to the southeast of the muddy area, which is the key season for the area to accept the deposition of the suspended sediment. Most of the summer and autumn muddy areas lacked the source of suspended matter, and the vortex center retreated to the north, resulting in a decrease in the sedimentation intensity of the muddy area and mainly affecting the northwestern area of the muddy area. The intensity and influence range of the sedimentary effect in spring argillaceous area are greater than those in summer and autumn, but less than in winter.