| 引用本文: | 李小强,周新郢,尚雪,JohnDodson.黄土炭屑分级统计方法及其在火演化研究中的意义.湖泊科学,2006,18(5):540-544. DOI:10.18307/2006.0517 |
| LI Xiaoqiang,ZHOU Xinying,SHANG Xue,John Dodson.Different-(kPa/℃) size method of charcoal analysis in loess and its significance in the study of fire variation. J. Lake Sci.2006,18(5):540-544. DOI:10.18307/2006.0517 |
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| 黄土炭屑分级统计方法及其在火演化研究中的意义 |
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李小强1, 周新郢1,2, 尚雪1,2, JohnDodson3
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1.中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安710075;2.中国科学院研究生院, 北京100039;3.Institute for Environment, Brunei Univereity, UK
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| 摘要: |
| 在综合了炭屑筛选法和炭屑花粉流程分析法的基础上,设计了一套从黄土、古土壤和古文化层中提取不同粒径炭屑的新途径——黄土炭屑分级统计方法,对不同粒级的炭屑进行分析和统计.筛选法提取、统计粒径在125μm 以上的炭屑颗粒,作为地方性火活动的替代指标;而用炭屑花粉流程分析方法获取粒径在125μm 以下的炭屑颗粒,作为区域性火活动的替代指标.黄土炭屑分级统计方法提高了炭屑研究的精度,丰富了黄土火演化研究的内容,是建立黄土高原火演化历史,研究植被演替和生态特征的重要途径,在认识黄土高原气候变化,探讨人类活动及其环境效应等方面具有重要意义. |
| 关键词: 黄土 炭屑 分级统计方法 火演化 |
| DOI：10.18307/2006.0517 |
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| 基金项目:国家自然科学基金(40372077, 40572108);中国科学院创新方向项目(KZCX3-SW-146);国家自然科学基金委员会创新群体项目(40121303)联合资助 |
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| Different-(kPa/℃) size method of charcoal analysis in loess and its significance in the study of fire variation |
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LI Xiaoqiang,ZHOU Xinying,SHANG Xue,John Dodson
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1.State Key Lab. of Loess and Quaternary Geology, Institute of Earth Environrment, Chinese Academy of Sciences, Xi'an 710075 P. R. China;2.Graduate School, Chinese Academy of Sciences, Beijing 10039, P. R. China
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| Abstract: |
| Based on two methods of Sieving and Pollen-slide, the author designed different size method of charcoal analysis to extract and count different fragment charcoal from loess'paleosol and culture layer. Sieving method is used to extract big fragment of charcoal (the size is over 125 ?) as the proxy of local fire regime;while Pollen-slide method can be used to get small fragment of charcoal (the size is lower 125 ?) as the proxy of regional fire regime. The different size method of charcoal improves the precision of the charcoal analysis and enriches the con-tenl on the study of fire history. The method provides a good way to reconstruct the fire variation and an important approach to study the vegetation history and ecological characteristic on the Loess plateau. Furthermore, the method can make great sense to understand the climatic variation and discuss human activity and their impaction to environ-ment |
| Key words: Loess charcoal different size method fire variation |
