| 全新世大暖期云南洱海环境演化的湖泊沉积记录 |
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| 引用本文： | 张振克,吴瑞金,王苏民,沈 吉,吴艳宏,李升峰.全新世大暖期云南洱海环境演化的湖泊沉积记录[J].海洋与湖沼,2000,31(2):210-214. |
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| 作者姓名： | 张振克 吴瑞金 王苏民 沈 吉 吴艳宏 李升峰 |
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| 作者单位： | 1. 南京大学大地海洋科学系,南京,210093
2. 中国科学院南京地理与湖泊研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金!49672132，中国科学院创新工程项目!KZCX1－Y－05 |
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| 摘 要： | 根据高分辨率湖泊沉积的有机碳稳定同位素记录、硅藻等环境指标分析结果，将洱海全新世大暖期（８．１－３．０ＫaＢ．Ｐ）的环境演化为７个阶段，环境变化序列以温（暖）湿 －暖（温）干为主，其中存在的明显冷干（湿）事件，冷事件出现在７．２ＫaＢ．Ｐ、５．３ＫaＢ．Ｐ和３．７ＫaＢ．Ｐ。全新世大暖期洱海湖面波动与气候变化具有明显的一致性。洱海湖泊沉积记录的环境演化主要受亚洲季风强弱转换和时空迁移的影响，冷事件与亚
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| 关 键 词： | 湖泊沉积 洱海 环境演变 古气侯 全新世 大暖期 |
| 收稿时间： | 1998/8/12 0:00:00 |
| 修稿时间： | 1999/11/8 0:00:00 |
ENVIRONMENTAL EVOLUTION RECORDED BY LAKE SEDIMENTS FROM ERHAI LAKE, YUNNAN PROVINCE IN HOLOCENE MEGATHERMAL |
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| ZHANG Zhen-ke,WU Rui-jin,WANG Su-min,SHEN Ji,WU Yan-hong and LI Sheng-feng.ENVIRONMENTAL EVOLUTION RECORDED BY LAKE SEDIMENTS FROM ERHAI LAKE, YUNNAN PROVINCE IN HOLOCENE MEGATHERMAL[J].Oceanologia Et Limnologia Sinica,2000,31(2):210-214. |
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| Authors: | ZHANG Zhen-ke WU Rui-jin WANG Su-min SHEN Ji WU Yan-hong and LI Sheng-feng |
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| Institution: | Department of Geography and Oceanography, Nanjing University, Naming, 210093;Nanjing Institute of Geography and Limnology , The Chinese Academy of Sciences, Nanjing, 210008;Nanjing Institute of Geography and Limnology , The Chinese Academy of Sciences, Nanjing, 210008;Nanjing Institute of Geography and Limnology , The Chinese Academy of Sciences, Nanjing, 210008;Nanjing Institute of Geography and Limnology , The Chinese Academy of Sciences, Nanjing, 210008;Department of Geography and Oceanography, Nanjing University, Naming, 210093 |
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| Abstract: | Based upon the high resolution environmental proxy data including radiocarbon ages, organic carbon stable isotope ratios and diatom concentrations from Erhai Lake sediment cores, the environmental evolution in Holocene Megathermal (ca. 8.1-3.0ka B.P.) is divided into seven stages with the main sequences of temperate or warm-wet and warn (temprate)-dry. The events of cold wet (3.7ka B. P.) and cold dry (7.2ka B.P. and 5.3ka B.P.) are recorded by the sediments from Erhai Lake in Holocene Megathermal. During the period the lake level fluctuations were coincided with climate variations. The environmental evolution recorded by lake sediments was mainly affected by the strong-weak transition and tomporal-spatial changes of the monsoon in Asia. Stages of warm (temperate)-dry in Holocene Megathermal were controlled by the west-moving of subtropical high pressure in the Northwest Pacific Ocean which indicates that southeast monsoon was intensified in summer. Stages of temperate (warm)-wet show the intensification of southwest monsoon. The cold events were the results of the enhancement of winter monsoon in East Asia. |
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| Keywords: | Lake sediment Erhai Environmental changes Southwest monsoon East Asian monsoon Holocene Megathermal |
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