青藏高原是我国天气气候的上游敏感区，其对东亚大气环流乃至区域大气污染有重大影响。针对青藏高原东部城市群大范围气溶胶呈异常分布，并呈持续现象，本项目将华北（京津冀）与华东（长三角）为重点研究区域，探讨高原背风坡特殊“垂直环流结构”与大地形绕流、汇流等动力效应对中国东部大气污染过程气溶胶影响域及其“辐合带”、输送通道的影响机制，研究中国东部高原热源结构与大地形东侧大气上层温度距平“逆温盖”相关特征，本项目将揭示此“强信号”特征与低层逆温频发相关机理；探讨青藏高原三维动力、热力结构与大地形东部水汽输送流型，气溶胶高湿环境效应的相关机理，并剖析不同季风年型下青藏高原大气热源变化对中国东部气溶胶分布及霾天气变异过程的“气候调节”作用。本项目拟研究青藏高原动力、热力三维结构变化及其季风活动对大地形东部区域大气污染分布变异的协同影响机理，有望将青藏高原影响理论拓展到大气环境前沿性领域的应用研究之

The Tibetan Plateau (TP), acting as the upstream key sensitive area of the climate and weather in Eastern China, exert a profound impact on its atmospheric circulation and regional air pollution. Precious studies have shown the abnormal and long-lasting distribution of aerosols over the large scale city clusters to the east of TP. Taking the Huabei (Beijing-Tianjin-Hebei) and Huadong (Yangtze River Delta) regions of China as the study areas, this project will explore the influence mechanism of the dynamical effects of the special "down-rolled flow", the impacts "vertical circulation structure" and baffling flow at the lee of TP on aerosol influential domain, as well as the aerosol "convergence zone" and the aerosol transmission tunnel over eastern China. Then, the relationship between the plateau heat source structure and the characteristics of "inversion cover" over eastern China will be explored. This "strong signals" of upper atmospheric temperature anomaly and the frequent low-level temperature inversion during the heavy pollution process will be further revealed. Thereafter, the correlation mechanism between TP’s 3-D dynamical and thermal structures and water vapor transport pattern and aerosol high-humid environmental effects in the east of the magarelief will be explored, and the effects of TP’s atmospheric heat sources changes in different monsoon years on aerosol distribution and the "climate modulations" in the haze weather variation processes over eastern China will also be analyzed. This project plans to investigate the changes of TP’s 3-D dynamical and thermal structures and the combined influence mechanisms of East Asian monsoons on spatiotemporal distribution and variation of air pollution over Eastern China, and it is highly expected to expand the theory of TP effect to the frontier research and application study of atmospheric environment.