收稿日期: 2001-05-08
修回日期: 2001-08-13
网络出版日期: 2002-06-01
基金资助
国家教育部回国人员启动基金；山东省自然科学基金重点项目“山东近海沉积物中致突变物质的含量与评估”（编号：Z99E03）联合资助.
APPLICATION AND MODELS OF COSMOGENIC NUCLIDE 10Be IN MARGINAL SEA RESEARCH
Received date: 2001-05-08
Revised date: 2001-08-13
Online published: 2002-06-01
杨永亮 . 10 Be在大洋边缘海洋学中的应用及模型[J]. 地球科学进展, 2002 , 17(3) : 355 -362 . DOI: 10.11867/j.issn.1001-8166.2002.03.0355
The potential application of the cosmogenic nuclide 10Be in marginal seas and island-arc system study has been discussed. Dissolved beryllium-10 concentration profiles in seawaters of the East China sea and the Kuroshio have been investigated. The results show that 10Beconcentrations in this area are mainly controlled by surface biological productivity, partical remineralization, and the degree of mixing with Changjiang River (the Yangtze river) and Kuroshio waters. Generally the10Be water depth profiles can be divided into three layers: the surface mixing layer, the particulate 10Be regeneration layer and the bottom layer. Surface water10Be concentrations increase gradually towards the Okinawa Trough and increase sharply at the edge of the Kuroshio Current. Vertical distributions of 10Be show that 10Be is enriched in the bottom waters near the Yangtze river estuary and the central continental shelf. Box model results indicate that 10Be input from the Kuroshio current is more important than Yangtze river input and atmospheric precipitation. About 81% of the10Be input to the East China sea is scavenged into the sediments and 19% of the 10Be flows out of the East China sea by currents and water exchange. The10Be sedimentation flux in the East China sea is nearly five times of the average global 10Be production rate. Therefore the East China sea may be an important sink for 10Be.
Key words： 10Be; Marginal sea; Island-arc system; Kuroshio.
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