| 摘要: |
| 悬浮体系指悬浮在水中,经过过滤能停留在滤膜或滤纸上的一切物质质点，其中包括泥沙颗粒、浮游生物及各种胶体物质等。悬浮体浓度分布是自然环境条件的综合反映，与物质来源，海洋环流、潮流、波浪等动力要素密切相关。因此，悬浮体浓度及运移途径是测试环境条件的重要参数，对其进行研究将对开发港口、合理利用土地资源、保护生态环境具有重要的实际意义，对于探讨现代沉积过程则具有理论意义。 |
| 关键词: 东海 悬浮体 分布 演变 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第4892号。中国科学院知识创新工程项目(KZCX2-207),国家重点基础研究发展规划项目(G1999043803)联合资助。 |
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| The Distributing Features and Temporal Variability of Suspended Matter Concentration in the East China Sea |
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PANG Chongguang, WANG Fan
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Institute of Oceanology, The Chinese Academy of Sciences
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| Abstract: |
| About 50-year data on water and sediment discharge of the Changjiang River at the Dotong gauge, and observation data on suspended matter concentration collected in 22 cruises in the East China Sea (ECS) were analyzed to study the tendency of water and sediment discharge of the Changjiang River and the temporal variability of suspended matter concentration in the ECS. From the 1950s up to now, the annually average water discharge of the Changjiang River was not obviously variable, while sediment discharge had declined remarkably since 1986 because of the construction of the Gezhou Dam. Suspended matter concentration in the ECS having obviously decreasing trend with time, was consistent with the variability of sediment discharge of the Changjiang River. Furthermore, the reduction of suspended matter concentration at the Estuary and its adjacent sea area was more than that on the continental shelf. The decrease of suspended matter concentration in the sea was not to the same extent as that in the Changjiang River, because the factors that controlled suspended matter concentration in the studied sea area were the material source and the hydrodynamic conditions when in-situ observations were being carried out. Especially in winter, the hydrodynamic conditions sometimes would become the major factor controlling suspended matter concentration. |
| Key words: suspended matter concentration East China Sea distributing features |
