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Climatic control of orbital time-scale wildfire occurrences since the late MIS 3 at Qinghai Lake, monsoon marginal zone
Hao, Yifei1,2,3; Han, Yongming1,2,4; An, Zhisheng1,2,5; Burr, George S.1
Corresponding AuthorHan, Yongming(yongming@ieecas.cn)
2020-06-10
Source PublicationQUATERNARY INTERNATIONAL
ISSN1040-6182
Volume550Pages:20-26
AbstractWildfires play an important role in earth climate systems, with influences on the atmosphere, vegetation distributions, and human survival. Considerable debate persists with regard to the relationship between wildfire occurrence and climate. Some records indicate relatively fewer wildfires during glacial times as compared to the Holocene, while others support the opposite view. These contradictory views need to be resolved to fully understand the relationship and controlling mechanisms that relate biomass burning to climate. In this study, black carbon (BC), including both char and soot, is used to reconstruct wildfire history over the past 32 ka from Qinghai Lake. BC, especially as micrometer-size soot, is mainly transported via the atmosphere, and can carry evidence of wildfires over long distances. Qinghai Lake's position on the northeastern edge of the Tibet Plateau is especially well-suited to such long-distance transport, with a potentially global climatic impact. We observed a significantly positive relationship between char and soot fluxes that suggest that the Qinghai Lake BC record is dominated by material transported through the atmosphere in large-scale wildfires. We find that relatively more wildfires occurred during cold-dry late glacial time (32.8-11.7 ka), and fewer wildfires during the warm-humid Holocene. Our study demonstrates that drought is the key factor that determines wildfire occurrences on an orbital time-scale. These fundamental and persistent patterns can assist in our understanding of climate-wildfire interactions and in the assessment of feedbacks on the global climate system, for example, through the well-known relationship between soluble iron and atmospheric CO2.
KeywordWildfires Climate Orbital time-scale Monsoon Drought Feedback
DOI10.1016/j.quaint.2020.03.002
WOS KeywordTHERMAL/OPTICAL REFLECTANCE METHOD ; NORTHEASTERN TIBETAN PLATEAU ; CHINESE LOESS PLATEAU ; LAST GLACIAL MAXIMUM ; FIRE REGIMES ; ELEMENTAL CARBON ; CHARCOAL RECORDS ; FOREST-FIRES ; SOURCE AREA ; GRAIN-SIZE
Indexed BySCI ; SCI
Language英语
Funding ProjectNSF of China[41625015] ; Chinese Academy of Sciences[132B61KYSB20170005] ; Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; Chinese Academy of Sciences[ZDBS-SSW-DQC001] ; Chinese Ministry of Science and Technology[2016YFE0109500]
WOS Research AreaPhysical Geography ; Geology
Funding OrganizationNSF of China ; Chinese Academy of Sciences ; Chinese Ministry of Science and Technology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000555091700002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15125
Collection古环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorHan, Yongming
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao, Peoples R China
Recommended Citation
GB/T 7714
Hao, Yifei,Han, Yongming,An, Zhisheng,et al. Climatic control of orbital time-scale wildfire occurrences since the late MIS 3 at Qinghai Lake, monsoon marginal zone[J]. QUATERNARY INTERNATIONAL,2020,550:20-26.
APA Hao, Yifei,Han, Yongming,An, Zhisheng,&Burr, George S..(2020).Climatic control of orbital time-scale wildfire occurrences since the late MIS 3 at Qinghai Lake, monsoon marginal zone.QUATERNARY INTERNATIONAL,550,20-26.
MLA Hao, Yifei,et al."Climatic control of orbital time-scale wildfire occurrences since the late MIS 3 at Qinghai Lake, monsoon marginal zone".QUATERNARY INTERNATIONAL 550(2020):20-26.
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