长江口泥质区的季节性沉积效应
收稿日期: 2002-12-12
修回日期: 2003-03-20
网络出版日期: 2003-07-25
基金资助
国家自然科学基金项目(40146026; 40276016)
Seasonal Sedimentary Effect on the Changjiang Estuary Mud Area
Received date: 2002-12-12
Revised date: 2003-03-20
Online published: 2003-07-25
Supported by
National Natural Science Foundation of China, No.40146026; No.40276016
郭志刚,杨作升,范德江,潘燕俊 . 长江口泥质区的季节性沉积效应[J]. 地理学报, 2003 , 58(4) : 591 -597 . DOI: 10.11821/xb200304014
The seasonal distributions of suspended matter and their sedimentary effect on the Changjiang (Yangtze River) Estuary mud area (CEMA) were discussed, based on the three cruise data of total suspended matter, temperature and salinity collected in the Changjiang Estuary and its adjacent area in summer and winter. The results showed that the basic pattern of distributions of suspended matter in the CEMA and its adjacent area is almost the same in winter and summer. It is indicated that the sediments from Changjiang to the sea are almost trapped on the inner shelf west of 123o15'E, due to the strong obstruction of the Taiwan Warm Current (TWC), supporting that the sediments from Changjiang to the sea are mainly transported and deposited on the inner shelf. The sediment supply from Changjiang to the sea, TWC, Zhejiang Coastal Current (ZCC) and Changjiang Diluted Water (CDW) show a strong seasonal variation, resulting in the strong seasonal sedimentary effect on the CEMA. The sedimentation of this mud area is stronger in summer and weaker in winter. The CEMA is a "sink" of the sediments from Changjiang to the sea. It is suggested that the amount of sediments deposited in this mud area in summer is much more than that in winter. The sedimentation processes of the CEMA and southwest Cheju Island mud area are characterized by a strong seasonal variation, but the processes of the two mud areas are very different. The sedimentation of the southwest Cheju Island mud area is stronger in winter and weaker in summer.
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