234U/238U as a potential tracer for tracking water masses mixing in the northern East China Sea

• 作者: Tianwei Shang Xueyan Jiang Chenqing Yu
• 来源期刊: 海洋学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Marine Chemistry
• 页码范围: 23-31
• 页数: 9页
• 语种: 英文

摘要

The optimum multiparameter (OMP) method was often used to determine the percentages of water masses based on temperature, salinity and other parameters, like nutrient or dissolved oxygen (DO). There are a number of water masses in the East China Sea (ECS), a marginal sea of the western Pacific Ocean. However, it is difficult to clarify the proportion of water masses using traditional parameters, such as temperature, salinity, nutrient or DO because of the occurring of intensive biogeochemical processes in the near shore and shelf areas. Here, we reported the use of 234U/238U activity ratio embedded in the OMP method. The results indicate that seawater in the northern ECS mainly consisted of the estuarine water of Changjiang River (CEW), Kuroshio water (KW), and Yellow Sea Coastal Current (YSCC). In March 2017, the CEW only influenced the offshore waters shallower than 30 m; the KW affected the east edge and the YSCC contributed more than 75％ in the northern ECS.