The spatial and temporal distribution of fossil-fuel dervied pollutants in the sediment record of Lake Baikal, east Siberia
The spatial and temporal distribution of fossil-fuel dervied pollutants in the sediment record of Lake Baikal, east Siberia
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东西伯利亚贝加尔湖沉积物记录中化石燃料衍生污染物的时空分布
DOI：
10.1023/a:1008064123706
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发表时间：
1998
影响因子：
2.1
通讯作者：
R. Flower
中科院分区：
文献类型：
--
作者：
N. Rose;P. Appleby;J. Boyle;A. Mackay;R. Flower
从湖泊沉积物中提取的球形碳质颗粒(SCP)的时空模式为化石燃料衍生污染物的分布提供了明确的记录。在应用于贝加尔湖沉积物岩心时，空间分布模式与工业分布很好地吻合，最高浓度发现在距离伊尔库茨克最近的南部盆地。在湖泊所有区域的所有岩心中都发现了SCP，这与金属结果形成鲜明对比，在金属结果中，人类活动增强的沉积只在南部盆地表现出来。SCP在贝加尔湖沉积物中的分布具有明显的区域性，因此，长距离输送不被认为是这些污染物的重要途径。SCP的时间模式显示了反映该地区自20世纪40年代以来工业发展的趋势。1600米水柱的沉降率表明，SCP沉积物记录对沉积变化的敏感性可能比痕量金属高一个数量级左右。
Spatial and temporal patterns of spheroidal carbonaceous particles (SCP) extracted from lake sediments provide an unambiguous record of the distributions of fossil-fuel derived pollutants. When applied to sediment cores taken from Lake Baikal spatial patterns show good agreement with the distribution of industry, with the highest concentrations found in the southern basin nearest to Irkutsk. SCP were found to occur in all cores from all areas of the lake in contrast to metal results where anthropogenically enhanced deposition was only demonstrable in the southern basin. SCP distribution within the sediments of Lake Baikal is seen to be distinctly regional and therefore long distance transport is not thought to be an important pathway for these pollutants. Temporal patterns of SCP show trends that reflect the development of industry in the area since the 1940s. Settling rates in the 1600 m water column suggest that the SCP sediment record may be approximately an order of magnitude more sensitive to depositional changes than that of trace metals.