中国科学院地理科学与资源研究所, 陆地表层格局与模拟院重点实验室, 北京 100101
基金项目: 国家自然科学基金项目(批准号:41401228)资助
详细信息
作者简介: 崔巧玉, 女, 40岁, 助理研究员, 古生态学专业, E-mail:qiaoyu.cui@igsnrr.ac.cn
中图分类号: P532 收稿日期:2020-07-29
修回日期:2020-09-21
刊出日期:2020-11-30
Wildfire responses to millennial- and orbit-scale climate variability and vegetation changes during the last glacial-interglacial periods
Cui QiaoyuKey Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101
MSC: P532
--> Received Date: 29 July 2020
Revised Date: 21 September 2020
Publish Date: 30 November 2020
摘要
摘要:火是地球系统的重要组成部分，与气候变化、植被演替关系密切。正确认识自然状态下火-气候-植被之间的耦合关系是理解过去火演化机理、预测未来气候变化下火活动频率和强度的迫切需要。末次间冰期及末次冰消期是现今间冰期的气候相似型，其轨道及千年尺度火与气候、植被演化规律研究可为维持全球升温背景下陆地生态系统的稳定提供重要科学依据。本研究聚焦末次间冰期以来已有古火研究，借助全球炭屑数据库，归纳总结千年及轨道尺度上火对气候和植被变化的响应规律，获得以下主要认识：末次间冰期以来，轨道尺度上火演化趋势整体上与气候变化趋势一致；末次间冰期全球火活动整体高于末次冰期，但波动性较大；全球火活动在D-O旋回暖期增多，D-O旋回冷期及Henrich事件中火活动减少；植被对气候响应的滞后可以解释古火记录对气候旋回的滞后。但由于涵盖末次间冰期的古火记录缺乏，导致末次间冰期时段的古火集成结果存在一定的不确定性。深入理解轨道-亚轨道尺度全球及区域古火演化规律及机制需要更多长时间尺度高质量的古火及古植被记录的支持。
关键词: 炭屑/
火态势/
气候/
植被/
末次冰期/
末次间冰期
Abstract:Wildfire is an important part of the earth system, which is closely related to climate changes and vegetation successions. It is necessary to understand the coupling relationship between fire, climate and vegetation in natural state to understand the fire history dynamics and to predict the frequency and intensity of fire events under future climate change. The last interglacial period and the last deglaciation period are considered as best analogues for our present interglacial period. The comprehensive understanding of the linkages of fire-vegetation-climate during the last glacial-interglacial period can provide important scientific basis for maintaining the stability of terrestrial ecosystem under the background of global warming. Herein, this paper reviews the Quaternary fire studies briefly and synthesis qualified charcoal data contained in the global charcoal database(GCD) in order to investigate the linkages between wildfire, climate, and vegetation changes at the millennial-and orbit-scales during the last glacial-interglacial periods. The main conclusions are:the trend of the global biomass burning since the last interglacial period is consistent with the trend of climate change with a certain lag; the global fire activity in the last interglacial period is higher than that in the last glacial period, but with large variations; the global biomass burning increased in the warm periods of D-O cycles whereas decreased in the cold periods of D-O cycles and Henrich events; the lag of vegetation response to climate can explain the lag of palaeofire records to climate changes. However, due to the lack of sufficient palaeofire records covering the last interglacial period, the uncertainty of the synthesized fire regime for the last interglacial period is remain to be discussed. More high-quality palaeofire and palaeovegetation records covering the last glacial-interglacial period are needed to understand the dynamics of global and regional paleofire at orbital suborbital scale.
Key words:sedimentary charcoal/
fire regime/
climate change/
vegetation/
the last glacial period/
the last interglacial period
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