地球科学进展 ›› 2002, Vol. 17 ›› Issue (3): 355 -362. doi: 10.11867/j.issn.1001-8166.2002.03.0355

综述与评述 上一篇    下一篇

10 Be在大洋边缘海洋学中的应用及模型
杨永亮   
  1. 青岛大学环境科学系,山东 青岛 266071
  • 收稿日期:2001-05-08 修回日期:2001-08-13 出版日期:2002-12-20
  • 通讯作者: 杨永亮(1955-),男,河南清丰人,教授,主要从事海洋同位素地球化学研究.E-mail: qdenv@qdu.edu.cn E-mail:qdenv@qdu.edu.cn
  • 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

YANG Yong-liang   

  1. Department of Environmental Sciences, Qingdao University, Qingdao  266071, China
  • Received:2001-05-08 Revised:2001-08-13 Online:2002-12-20 Published:2002-06-01

主要讨论宇宙射线成因核素10Be(T 1/2= 1.5Ma)在大洋边缘海洋学尤其是中国近海海洋研究中的应用。在过去的近20年中,在中国开展的10Be研究在黄土堆积年龄及地层对比方面获得了诸多成果,但在海洋方面的应用研究距国际水平仍有一定的差距,尚需进一步加强。综述了海洋环境中10Be作为一个地球化学示踪剂的研究现状,着重介绍10Be在中国东部海域的收支平衡模式以及讨论10Be在太平洋西部边缘海及岛弧地区的应用前景。

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.

中图分类号: 

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