| 引用本文: | 薛滨,潘红玺,夏威岚,王苏民.历史时期希门错湖泊沉积色素记录的古环境变化.湖泊科学,1997,9(4):295-299. DOI:10.18307/1997.0402 |
| Xue Bin,Pan Hongxi,Xia Weilan,Wang Sumin.Palaeoenvironmental reconstruction of ximen cuo in historical period inferred from pigment record. J. Lake Sci.1997,9(4):295-299. DOI:10.18307/1997.0402 |
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| 摘要: |
| 湖泊沉积物中色素的含量、种类以及相应的参数是研究湖泊初始生产力和湖泊环境的有效手段之一.本文根据青藏高原东部希门错短柱岩芯XM9201沉积物的色素指标的综合判别,讨论了该地区过去2000多年来的古环境变化过程和特点.对比分析我国东西部气候记载及冰芯研究,探讨了各气候事件表现形式的异同点. |
| 关键词: 历史时期 希门错 湖泊沉积色素 古环境变化 |
| DOI：10.18307/1997.0402 |
| 分类号: |
| 基金项目:"八五"国家攀登计划KJ-85-07-2;国家科委资助 |
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| Palaeoenvironmental reconstruction of ximen cuo in historical period inferred from pigment record |
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Xue Bin, Pan Hongxi, Xia Weilan, Wang Sumin
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Nanjing Institute of Geography and Linmology, Chinese Academy of Geography and Nanjing 210008
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| Abstract: |
| The climate in the last 2 000 years has been highlighted in the field of global change. Ximen Cuo(33°23'N, 101°08'E)is a modern glacial lake. The core sampled at the lake bay (XM9201) havS a depth of 1.47m. The AMS radiocarbon on the organic mud at 1.4m deep is dated at 2 600±120aB. P. Meanwhile the radionuclide measurement suggests that the sedimentary rate is about 0.68mm/a, coinciding with the depositional rate inferred from UC data. Therefore.the sample at the interval of 2cm has a resolution of 30-40 yr. According to the synthetic analysis on all kinds of pigments.the study suggests that the Ximen Cuo (lake), lying in the eastern Tibetan Plateau, has undergone a climatic evolution something like that of historical record in East China, especially the climatic events.such as "MeclivenI Warm Period", "Little Glacial" etc,, but unlike the ice core record in Tibetan Plateau. This paper has also probed into the characteristics of the different events. The study indicates that limnological study is also an effective tool to research on the hisorical climate, especially in the areas where there are no suitable materials for historical climate research such as historical documents.tree-ring, ice-core, etc. |
| Key words: Ximen Cuo historical period sedimentary pigment palaeoenvironmental change |
