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湖泊科学  2006 

黄土炭屑分级统计方法及其在火演化研究中的意义

DOI: 10.18307/2006.0517

Keywords: 黄土,炭屑,分级统计方法,火演化

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Abstract:

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.

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