| 青土湖近6000年来沉积气候记录研究--兼论四五世纪气候回暖 |
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| 引用本文： | 王乃昂,李吉均,曹继秀,蔡为民.青土湖近6000年来沉积气候记录研究--兼论四五世纪气候回暖[J].地理科学,1999,19(2):119-124. |
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| 作者姓名： | 王乃昂 李吉均 曹继秀 蔡为民 |
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| 作者单位： | 兰州大学地理学系,兰州,730000 |
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| 基金项目： | 国家自然科学基金重大项目,博士后科学基金 |
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| 摘 要： | 对青土湖志云村剖面沉积气候记录和湖泊进退进行了研究，证实季风边缘区河西走廓东段存在暖湿，冷干气候变化的阶段性特征。根据湖相沉积的颜色，粒度，化学组成和有机质含量等气候代用指标的综合分析，提出公元四五世纪存在一次百年尺度上的气候回暖，这一气候回暖事件的发现，可得到历史文献记录和青海湖自然记录的佐证。
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| 关 键 词： | 青土湖 全新世 湖相沉积 气候记录 四五世纪回暖 |
A PRELIMINARY RESEARCH ON THE CLIMATIC RECORDS OF LACUSTRINE DEPOSITS OF QINGTU LAKE IN THE LAST 6000 YEARS |
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| Wang Nai'ang,Li Jijun,Cao Jixiu,Cai Weimin.A PRELIMINARY RESEARCH ON THE CLIMATIC RECORDS OF LACUSTRINE DEPOSITS OF QINGTU LAKE IN THE LAST 6000 YEARS[J].Scientia Geographica Sinica,1999,19(2):119-124. |
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| Authors: | Wang Nai'ang Li Jijun Cao Jixiu Cai Weimin |
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| Abstract: | A preliminary study on the advance and the retreat of Qingtu Lake and its climatic records of the Holocene lacustrine deposits has been made through comprehensive analysis. Based on the study on the lacustrine sedimentary color, grain size, Fe 3+ /Fe 2+ and organic matter, the authors put foward that a warm period existed during the phase of 355-480 A.D in the studied area. This warm period could be further testfied by a lot of evidence obtained from the historical documents and the natural records of Qinghai Lake. |
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| Keywords: | Qingtu Lake Holocene Lacustrine deposits Climatic records Warm period of 355-480 a A D |
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