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《Journal of Jilin University(Earth Science Edition)》 2014-04
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Wildfire History and Human Land Use over Weihe River Basin Since Holocene:Evidence from Charcoal Records

Tan Zhihai;Huang Chunchang;Pang Jiangli;Ding Min;Institute of Environmental Sciences and Chemistry Engineering,Xi'an Polytechnic University;State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences;Tourism and Environment College,Shaanxi Normal University;  
The carbon in Holocene loess deposition is often used to rebuild wildfire history and its evolution process.Through field investigation and the analysis of carbon dust and the magnetic susceptibility index,the earth's biological sedimentary evidence of wildfire landscape evolution inHolocene is obtained.With reference to OSL/TL dating,14 C dating and archaeology data,wildfire history and landscape evolution process in the loess plateau of Weihe River basin since Holocene is reconstructed.Results show that from the last glacial period to the Middle Holocene stage(12 000-3 100a B.P.),wildfire changes in loess plateau area of Weihe River basin are mainly associated with regional seasonal climate differences closely,among which the one thousand-one hundred scale effective humidity and fuel supply area change are the main controlling factors of wildfires.In the Late Holocene,with further drought climate,combined with human farming activities,human land use intensity and spacetime distribution have become an important driving force to influence of biomass burning scale.Since 3100years ago,farmland landscape in the south area of Weihe River has begun to take shape.About 2170years ago,the large-scale land reclamation has expanded to the loess tableland area in the north of Weihe River.Until 1 500years ago,dry farming landscape in loess high order platform tableland areas of northern Weihe River has basically formed.With a number of ancient ecological records and regional point of comprehensive analysis,it helps to understand the region wildfires history,human land use change and evolution of the social structure.
【Fund】: 中国博士后基金项目(2011M501473);; 黄土与第四纪国家重点实验室开放基金(SKLLQG1065 1120 1202);; 西安工程大学博士启动基金(BS1101)
【CateGory Index】: P534.632
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