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| 南极阿德雷岛湖泊沉积210Pb、137Cs定年及其环境意义 | |
| 引用本文： | 孙立广,谢周清,赵俊琳,项亮.南极阿德雷岛湖泊沉积210Pb、137Cs定年及其环境意义[J].湖泊科学,2001,13(1):93-96. |
| 作者姓名： | 孙立广 谢周清 赵俊琳 项亮 |
| 作者单位： | 1. 中国科学技术大学极地研究室，合肥230026 2. 北京师范大学环境科学研究所，北京100875 3. 中国科学院南京地理与湖泊研究所，南京210008 |
| 基金项目： | 国家自然科学基金! (4 0 0 76 0 32 )，中国科学院创新项目! (KZCX2 - 30 3)联合资助 |
| 摘 要： | 测试了南极阿德雷岛两个湖泊 (Y2和G)沉积物的2 10 Pb和137Cs比度 .根据2 10 Pb和137Cs比度垂向变化特征 ,采用CRS模式对G湖进行了定年 ,年龄跨度大约为 134± 43年 ,并据此计算了G湖的沉积速率 .近大约 10 0年来G湖呈增长变化的沉积速率以及沉积物2 10 Pb ,137Cs蓄积量和沉降通量远大于大气直接沉降 ,可能是温度升高引起该地区大量冰雪 (盖 )融水携带补充的结果 . |
| 关 键 词： | 南极 湖泊沉积物 铜同位素 铯同位素 定年 沉积速率 蓄积量 |
| 收稿时间： | 2000/4/24 0:00:00 |
| 修稿时间： | 2000/12/7 0:00:00 |
210Pb, 137Cs Dating of Lake Sediments from Ardley Island (Maritime Antarctic)and Their Environmental Implications |
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| SUN Liguang,XIE Zhouqing,ZHAO Junlin and XIANG Liang.210Pb, 137Cs Dating of Lake Sediments from Ardley Island (Maritime Antarctic)and Their Environmental Implications[J].Journal of Lake Science,2001,13(1):93-96. | |
| Authors: | SUN Liguang XIE Zhouqing ZHAO Junlin and XIANG Liang |
| Institution: | Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, P. R. China,Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, P. R. China,Institute of Environmental Science, Beijing Norma l University, Beijing 100875, P. R. China and Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China |
| Abstract: | The activity of 210Pb and 137Cs of lake sediments, namely Y2 and G, respectively from Ardley Island,Antarctica have been measured. According to the profiles of 210Pb and 137Cs activity, we used CRS model to date the G lake, which spans about 134 ± 43 years. Base on the dating, we estimate the velocity of deposition. The increased sedimentation rates and the inventories of 210Pb and 137Cs as well as their flux being higher than the atmospheric deposition could be reasonably attributed to the supply of a great amount of ice-melt water. |
| Keywords: | Antarctica lake sediment 210 Pb dating 137 Cs dating |
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