Sinking of particulates ^(234)Th_(xs),~7Be and ^(210)Pb_(xs) in the Changjiang estuary,China

作     者：黄德坤 杜金洲 吴云峰 李道季 张经 

作者机构：State Key Laboratory of Estuarine and Coastal ResearchEast China Normal University 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2010年第28卷第6期

页      面：1152-1159页

核心收录：

学科分类：0710[理学-生物学] 070702[理学-海洋化学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 0815[工学-水利工程] 

基　　金：Supported by the National Natural Science Foundation of China (No.40976054) the State Key Laboratory of Estuarine and Coastal Research of China (No. 2008KYYW08) the National Basic Research Program of China (973 Program) (Nos. 2002CB412405 and 2006CB400601) 

主　　题：thorium-234 beryllium-7 lead-210 residence times Changjiang (Yangtze River) estuary 

摘      要：The time scale of transport and reaction processes in the ocean can be evaluated using natural radionuclides of different *** the present study,we evaluated the residence times of particulate reactive radionuclides 7 Be,210 Pb xs and 234 Th in the Changjiang (Yangtze River) estuary,which is a high turbidity estuary,in June,*** residence times of particulate 7 Be,234 Th xs and 210 Pb xs in the Changjiang estuary were calculated to be 0.7-20.4,0.18-4.1 and 0.6-89.8 d,*** obtained residence times of those nuclides are comparable with those of other estuaries and *** 234 Th xs and 7 Be,the residence times decreased with increasing concentrations of suspended particulate matter (SPM);however,those of 210 Pb xs ***,scavenging residence times of 234 Th and 7 Be increased from coast to offshore,while those of 210 Pb xs decreased.