史前关中盆地土壤剖面的黑碳与炭屑记录
发布时间：2019-01-07 20:08
【摘要】：参照OSL测年和考古与历史学断代,利用黄土—土壤剖面沉积物中炭屑和黑碳(焦炭和烟炱)记录,结合磁化率、有机碳等古环境指标,揭示过去12000年火灾历史演变过程。炭屑和黑碳浓度研究结果表明:全新世早期区域野火活动频繁发生,中期火灾很少,晚期本地火灾频率呈现增长态势。黑碳(烟炱和焦炭)和炭屑分析呈现不平行变化趋势,可能是生物质燃烧的物质排放方式和传输过程的区域差异引起。距今3500~2800年间,黑碳和炭屑颗粒浓度峰值与全新世短尺度恶化气候事件具有明显同步性;同期,先周人部落大规模土地开垦发展旱作农业活动加剧。黄土高原千年尺度火灾变化与季风气候变化之间的关系表明:全新世以来,野火频率变化取决于区域气候有效湿度和人类土地利用及其对气候变化的响应。
[Abstract]:Referring to OSL dating and archaeological and historical dating, the history of fire in the past 12 years was revealed by using the records of carbon debris and black carbon (coke and soot) in the loess soil profile, combined with magnetic susceptibility, organic carbon and other paleoenvironmental indicators. The results of the study on carbon and black carbon concentration show that the wildfires occurred frequently in the early Holocene, and there were few wildfires in the middle stage, and the local fire frequency in the late period showed an increasing trend. Black carbon (soot and coke) and carbon debris analysis showed a non-parallel trend, which may be caused by the regional differences in the emission patterns and transport processes of biomass combustion. During the period of 3 500 ~ 2800, the peak concentration of black carbon and carbon particles was synchronic with the short scale deterioration of climate events in Holocene, and in the same period, the large-scale land reclamation and dryland farming activities of the people of Qianzhou were intensified. The relationship between the millennium scale fire change and the monsoon climate change in the Loess Plateau shows that the variation of wildfire frequency since Holocene depends on the regional climate effective humidity human land use and its response to climate change.
【作者单位】： 西安工程大学环境与化学工程学院;中国科学院地球环境研究所黄土与地质国家重点实验室;南京信息工程大学海洋科学学院;
【基金】：国家自然科学基金项目(41271228) 黄土与第四纪国家重点实验室开放基金(No.SKLLQG1518) 西安工程大学科研项目(No.KJ2013-0383)资助
【分类号】：S151.9
本文编号：2404099
[Abstract]:Referring to OSL dating and archaeological and historical dating, the history of fire in the past 12 years was revealed by using the records of carbon debris and black carbon (coke and soot) in the loess soil profile, combined with magnetic susceptibility, organic carbon and other paleoenvironmental indicators. The results of the study on carbon and black carbon concentration show that the wildfires occurred frequently in the early Holocene, and there were few wildfires in the middle stage, and the local fire frequency in the late period showed an increasing trend. Black carbon (soot and coke) and carbon debris analysis showed a non-parallel trend, which may be caused by the regional differences in the emission patterns and transport processes of biomass combustion. During the period of 3 500 ~ 2800, the peak concentration of black carbon and carbon particles was synchronic with the short scale deterioration of climate events in Holocene, and in the same period, the large-scale land reclamation and dryland farming activities of the people of Qianzhou were intensified. The relationship between the millennium scale fire change and the monsoon climate change in the Loess Plateau shows that the variation of wildfire frequency since Holocene depends on the regional climate effective humidity human land use and its response to climate change.
【作者单位】： 西安工程大学环境与化学工程学院;中国科学院地球环境研究所黄土与地质国家重点实验室;南京信息工程大学海洋科学学院;
【基金】：国家自然科学基金项目(41271228) 黄土与第四纪国家重点实验室开放基金(No.SKLLQG1518) 西安工程大学科研项目(No.KJ2013-0383)资助
【分类号】：S151.9
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