特邀美国农业部林业局森林变化研究中心高级研究员刘永强教授作学术报告

发布单位:应用气象学院编辑:郑文英发布时间:2018-06-06浏览量:176

报告题目The Meteorological Impacts of Forest Fires

     2018611日(周一)15:00-16:00

    气象楼814会议室

报 告 人刘永强 教授

主 持 人杨再强 教授

欢迎广大师生踊跃参加!

 

专家简介

刘永强教授长期从事地气相互作用、气溶胶和气候相互作用、气候和生态系统相互作用和区域气候模拟的研究工作,改进了地气相互作用时间尺度的估计,应用区域气候模拟进行旱涝模拟及预报、陆地风参数化、三北防护林改进区域气候的作用、林火气溶胶对干旱的增强作用、气候变化对生态系统影响的预测等。目前联合负责美国林业局森林火灾温室气体和气溶胶排放综合评估项目和林业局南方研究院气候变化研究森林火灾分项目。研究课题包括地球模拟系统改进、气候变化对森林火灾和都市空气质量的影响、以及地表状况变化的气候效应。

 

报告摘要:

Forest fire can affect weather conditions by reducing forest coverage. Investigating this impact would improve our understanding of fire-vegetation-climate interactions and the capacity of post-fire tree restoration management. This study detected land-surface property changes induced by large wildfires in the continental United States using MODIS and simulated the meteorological responses using the WRF model. The results show that fires reduce LAI and NDVI. Albedo first decreases and then increases. The changes are complex, depending on vegetation type and coverage, climate type, and season. The land-surface property changes lead to the formation of heat island effect resulted from increases in solar radiation and sensible heat flux. Relative humidity is reduced, mainly due to decreased evapotranspiration. Drought index increases accordingly, which would adversely affect post-fire tree regeneration. A parameterization scheme was developed based on the satellite detection to predict long-term changes of vegetation coverage for the Earth system models to simulate the meteorological impacts of forest fires.

 

应用气象学院

江苏省农业气象重点实验室

201866