长江口泥质区的季节性沉积效应

摘要

Seasonal distributions of suspended matter and their sedimentary effect on the ChangjiangEstuary mud area of the East China Sea were discussed, based on three cruise data of totalsuspended matter, temperature and salinity collected from the Changjiang Estuary and its adjacentarea in summer and winter. The results show that the basic pattern of distributions of suspendedmatter in the study area is almost the same in winter and in summer. Sediments from Changjiang(Yangtze River) to the sea are chiefly trapped to the west of 123°15'E due to a strong obstruction ofthe Taiwan Warm Current. This suggests that these sediments are mainly transported and deposited inthe inner shelf. The sediment supply, Taiwan Warm Current, and Zhejiang Coastal Current show astrong seasonal variation, which results in a strong seasonal variation of the sedimentary effect onthis mud area. This mud area is a "sink" of the Changjiang's sediment discharge to the sea and itssedimentation is stronger in summer and weaker in winter.