| 中国过去2000年湖泊沉积记录的高分辨率研究:现状与问题 |
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| 引用本文： | 吉磊.中国过去2000年湖泊沉积记录的高分辨率研究:现状与问题[J].地球科学进展,1995,10(2):169-175. |
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| 作者姓名： | 吉磊 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室 |
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| 摘 要： | 过去２ｋａ地球环境的变化规律和原因是全球变化研究的关键内容之一，与其它自然记录相比，湖泊沉积具有储存信息量大，时间分辨率高和地理覆盖面广的优势。中国８０年代后期以来已陆续开展了全新世湖泊沉积与气候，环境演化研究，并有迅速发展之势，对于过去２ｋａ湖泊沉积的高分辨率研究，需要重视以下几方面问题，即提高核素测年的精度，建立环境指标的转换函数，注意早期化学成岩作用，选择分层湖和年层沉积，探讨气候要素有效指
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| 关 键 词： | 湖泊沉积 湖泊记录 全球变化 高分辨率 |
HIGH -SOLUTION STUDY ON LACUSTRINE SEDIMENTARY RECORDS FOR PAST 2000 YEARS IN CHINA:DEVELOPMENTS AND PROBLEMS |
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| Ji Lei.HIGH -SOLUTION STUDY ON LACUSTRINE SEDIMENTARY RECORDS FOR PAST 2000 YEARS IN CHINA:DEVELOPMENTS AND PROBLEMS[J].Advance in Earth Sciences,1995,10(2):169-175. |
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| Authors: | Ji Lei |
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| Institution: | Lake Sediment and Environment Laboratory, Institute of Geography and Limonology, Academia Sinica, Nanjing 210008 |
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| Abstract: | The regularities and causse of the earth environmental changes for past 2000 years areone of the major contents of the global change research;Compared with the other naturalrecords,the lake sediments have the advantages of abundant information reserved,highertime solution and extensive geographic coverage.The studies on the Holocene lake sedi-ments in respect to climatic and environmental changes have been carried on in China since1980s,and are developing quickly now. As to the high-solution studies on lake sedimentsfor past 2000 years,great attention should be paid to the several problems:(1 )Improvingthe precision of nuclear dating technique;(2)Setting up the transfer function of the envi-ronmental proxies;(3)Understanding the early chemical diagenisis of the sediments;(4)Choosing stratified lakes and varved sediments;(5)Approaching the effective proxies forclimatic elements;(6)Distinguishing the impact from human activities;and(7)Strenthingthe spatial and temperal comparative studies. |
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| Keywords: | Lacustrine sediments Lake record Past global change |
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