云南森林资源丰富，但近年来，由于全球气候异常导致云南极端干旱事件与森林火灾频发。因此，在自然环境背景下重建森林火灾历史成为认识气候变化与森林火灾关系的关键。本项目拟通过对云南滇中地区湖泊沉积物中各种气候环境指标的分析，及其与左旋葡萄糖含量/沉积通量记录的对比研究，确定左旋葡萄糖含量与森林火灾频率、强度间的关系，建立过去3000年以来滇中地区植被火情的变化历史，结合气候变化资料，阐明生物质燃烧—气候—森林火灾间的相互联系，探讨全球气候变化下的植被火情时空变化特征。这将为全面认识云南森林火灾的发生规律以及森林火灾防护提供一定的科学依据；同时，这对理解历史时期地球碳循环过程也具有重要的意义。

Yunnan is rich in forest resource, however, extreme climate events and forest fire in Yunnan happened frequently under the background of the global climate change. Therefore, reconstruction the forest fire history become the key to understand the relationship between climate changes and forest fires under natural conditions during the geological times. This project plans to drill lake cores from the central of Yunnan. By analysis of the proxies of climatic and environmental records, especially by the variations of levoglucosan concentration which is the only source of biomass burning, we will determine the relation between the levoglucosan concentration and the frequency and intensity of forest fire, and the history of paleofire activity in the central of Yunnan will be reconstructed over the past 3000 years. Meanwhile, we also analyze the interconnection of biomass burning, climate and forest fire, and discuss the spatial-temporal characteristics of globe forest fire combined with climate change data.This project will provide scientific basis for comprehensively understanding the regularity of regional forest fire and the forest fire prevention in Yunnan.