气溶胶
环境科学
大气科学
辐射压力
高原(数学)
激光雷达
气候学
航空网
臭氧总量绘图系统
航程(航空)
气象学
地理
地质学
遥感
臭氧层
数学分析
复合材料
平流层
材料科学
数学
作者
Chen Bin,Li Dong,Jianping Huang,Yixuan Wang,Zhikun Jing,Wei Yan,Xin Wang,Zhihao Song,Zhongwei Huang,Xiaodan Guan,Xuefeng Dong,Yue Huang
摘要
Long-range transport and vertical distribution of aerosols are important factors for assessing the uncertainty in aerosol radiative forcing. This paper reveals the vertical distribution and trends of aerosol optical properties in China using 15 years of Cloud-Aerosol Lidar with Orthogonal Polarization data. The Hybrid Single-Particle Lagrangian integrated trajectory model was used to analyze the transport and trends of aerosols in the layer with the highest occurrence frequencies of dust, polluted dust, polluted continental and elevated smoke aerosols. The results indicated that (1) there were significant regional and seasonal differences in the vertical distribution of aerosols. The aerosol optical depth (AOD) trend in a given region depends on the changes in the aerosol type with the highest frequency and the layer corresponding to the largest AOD in the vertical profile. The frequency of polluted dust aerosols was the highest in Beijing-Tianjin-Hebei (BTH) and Central China. The considerable decrease in the 0-2 km AOD led to a significant trend of the column AOD. (2) The changes of AOD and main aerosol types in a region are also affected by the changes of aerosol sources and long-range transport pathways. In the BTH, dust aerosols originated from the Mongolian Plateau, accounting for 57.88% of the total trajectories. The Pearl River Delta was dominated by elevated smoke aerosols, with trajectories mainly originating from the Myanmar and Vietnam, accounting for 27.38% and 29.59%, respectively. The trend of 15-year backward trajectories of dust aerosols on the Tibetan Plateau indicated that the trajectory from India is increasing.
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