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长江入东海的化学物质输送特点

黄薇文 张经

黄薇文, 张经. 长江入东海的化学物质输送特点[J]. 海洋学报, 1994, 16(2): 54-62.
引用本文: 黄薇文, 张经. 长江入东海的化学物质输送特点[J]. 海洋学报, 1994, 16(2): 54-62.

长江入东海的化学物质输送特点

  • 摘要: 本文基于1984~1987年间对长江下游及河口地区的4个航次的观测和分析结果,讨论了常量与重金属元素的浓度及输送模式.与世界上其他大河流相比长江重金属元素的浓度较低,相反常量元素含量较高,这与中国大陆强烈的化学剥蚀和相对较低的人类活动水平有关.在淡水-咸水混合过程中大多数颗粒态元素呈稳定态分布,特别是当元素的绝对浓度用A1或Sc校正后尤为明显.溶解常量元素呈保守性,因此它们的输送通常可根据河流末端浓度与流量或含沙量之积来估算.大多数溶解态痕量元素是非保守的,在估算它们的外输通量时应根据元素在河口的分布曲线乘以相应的增高或减小因子.
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出版历程
  • 收稿日期:  1991-07-04
  • 修回日期:  1993-07-07

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