四川盆地特殊地形背景下气溶胶污染时空分布与天气气候影响相关机理

项目名称： 四川盆地特殊地形背景下气溶胶污染时空分布与天气气候影响相关机理

项目编号： No.91544109

项目类型： 重大研究计划

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 赵天良

作者单位： 南京信息工程大学

项目金额： 80万元

中文摘要： 作为全国气溶胶污染高值区之一，青藏高原东缘四川盆地的气溶胶时空变化区域特征及其成因，是一个亟待深入研究，并具有重要应用价值的挑战性的课题。本项目为探索四川盆地特殊地形背景下天气气候与盆地高气溶胶相关关系，拟用MODIS，MISR和CALIPSO等卫星遥感数据、四川盆地气象台站近50多年的气候资料、近些年环境监测的大气颗粒物资料和西南低涡加密观测科学试验气象资料，并开展关键区阶段性大气气溶胶的垂直结构观测试验，应用多源信息综合观测分析和数值模拟方法，研究盆地气溶胶时空分布特征及其盆地大气边界层和天气气候变化相关机制；剖析盆地特殊地形作用对区域重气溶胶污染事件形成及其气象影响因素；探讨青藏高原大地形东侧区域气溶胶空间分布“避风港”效应及对盆地大气环境变化的“气候调节”影响；评估盆地大气气溶胶气候效应及对区域降水变化的影响。意在探索四川盆地气溶胶污染形成机理，揭示大地形对大气环境变化的影响效应。

中文关键词： 气溶胶；四川盆地；多尺度大气物理过程；地形作用；降水

英文摘要： The tempro-spatial distribution and its causes over the Sichuan Basin at the eastern edges of the Tibetan Plateau, a region with high aerosol pollution in China, are an important research issue and a challenge topics with a high practical value in atmospheric environment.. To understand the connection of the high aerosol center with weather and climate over the Sichuan Basin, this project will employ the remote sensing data of MODIS，MISR and CALIPSO, the climate data observed by the Sichuan Basin’s observatories over more than 50 years, the aerosol particle measurement data of environmental monitoring and the intensive field observations on the Southwest China Vortex over recent years as well as design a. field observation of vertical aerosol profiles over the key area of the Sichuan Basin. With the comprehensive analysis of multi-source aerosol observations and numerical modeling, It is proposed that the characteristics of tempro-spatial aerosol distribution and the associated mechanism on impact of atmospheric boundary layer, weather and climate are investigated, the terrain effect of the Sichuan Basin on formation of regional high aerosol pollution events and the meteorological factors are analysed, “Harbor” effect of the Tibetan Plateau’s large topography on aerosols and its climate modulation on atmospheric environment over the Sichuan Basin are explored, and climate effect of aerosols on regional precipitation variations is assessed. The highlights of this research project are revealing the mechanism on formation of aerosol pollution over the Sichuan Basin and the effect of large topography on changes of atmospheric environment.

英文关键词： aerosol;Sichuan Basin;Multi-scale atmospheric physical process;terrain effect ;precipitation