| 引用本文: | 曾理,吴丰昌,万国江,郑建.中国地区湖泊沉积物中137Cs分布特征和环境意义.湖泊科学,2009,21(1):1-9. DOI:10.18307/2009.0101 |
| ZENG Li,WU Fengchang,WAN Guojiang,ZHENG Jian.The distribution characteristic and environmental significance of Cesium-137 deposit profile in Chinese lacustrine sediment. J. Lake Sci.2009,21(1):1-9. DOI:10.18307/2009.0101 |
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| 中国地区湖泊沉积物中137Cs分布特征和环境意义 |
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曾理1,2,3, 吴丰昌2, 万国江1, 郑建4
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1.中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002;2.中国环境科学研究院湖泊基地, 国家环境保护湖泊污染控制重点实验室, 北京 100012;3.中国科学院研究生院, 北京 100049;4.国立放射医学综合研究所, 那珂凑, 日本
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| 摘要: |
| 137Cs是人为放射性核素,长期以来,它在沉积物岩芯剖面中的分布被用作近代沉积物定年的重要手段之一.本文全面收集了关于我国湖泊沉积物中137Cs分布的研究文献,对它们进行了综合分析和对比,试图揭示中国湖泊沉积物中137Cs剖面分布特征和环境意义:结合我国湖泊分区和特点,分别讨论了我国5大湖区137Cs的总体特征和主要影响因素.研究表明:影响137Cs沉积剖面分布的因素,除了纬度和海拔外,还应与当地的地貌特征、降雨量、植被状况和人类活动有关,全球核大气沉降是中国湖泊沉积物的137Cs剖面分布最主要的来源,同时我国早期的大气核试验和前苏联切尔诺贝利核泄漏事件对我国部分地区137Cs分布可能有一定的影响. |
| 关键词: 湖泊 沉积物 计年 137Cs 沉积剖面 |
| DOI：10.18307/2009.0101 |
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| 基金项目:中国科学院重要方向项目(KZCX2-YW-102);国家自然科学基金项目(40525011、40632011);中国环境科学研究院公益项目(2007KYYW01)联合资助 |
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| The distribution characteristic and environmental significance of Cesium-137 deposit profile in Chinese lacustrine sediment |
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ZENG Li1,2,3, WU Fengchang2, WAN Guojiang1, ZHENG Jian4
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1.State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, P. R. China;2.State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Environment, Chinese Research Academy of Environment Sciences, Beijing 100012, P. R. China;3.Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China;4.National Institute of Radiological Sciences, Hitachinaka-Shi, Japan
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| Abstract: |
| Cesium-137(137Cs) is an artificial radionuclide. Its distribution in the deposit profile is used as a tool of sedimentary chronology. In order to know the depth distribution profile characteristics and environmental significance of 137Cs in the sediment of Chinese lake, the literatures concerned were compared and analyzed in this article. We discussed the whole characteristics and main affect factor of lacustrine sedimentary profile of 137Cs in five lake areas by reason of different physiognomy. This research indicated that the 137Cs deposit profile related to the physiographic characteristics, rainfall, vegetation and human activity besides latitude and altitude. The atmospheric nuclear experiment in China and the Chernobyl accident in Pre-Soviet Union potentially influenced on the 137Cs distribution of some zone. |
| Key words: Lake sediment chronology 137Cs sedimentary profile |
