大气边界层和大气扩散的数值模拟 ；

源估算、解析和反演

卫星数据在大气环境中的应用

代表性论文

S Liu，X Cai，Y Song，H Zhang，Y Yan，X Wang, Climatic features of wind field and their impact on local air quality in Taiyuan Basin, Science of The Total Environment, 2025

L Yuan，M Liu，X Dang，H Wu，F Shang，L Wei，P Fu，Y Song，M Hu, Modelling of sulfur chemistry in a fog episode in northern China and implication for the efficacy of SO2 emission control, Atmospheric Environment, 2024

L Zhang，H Zhang，X Cai，Y Song，A Mamtimin，Q He, Physical Mechanisms of Deep Convective Boundary Layer Leading to Dust Emission in the Taklimakan Desert, Geophysical Research Letters,2024

学术著作

蔡旭晖，宋宇：《污染气象学廿一讲》，北京，气象出版社，2021