资源环境科技发展态势分析平台

Previous study of the tropopause aerosol layer is focused on the region surrounding the Tibetan Plateau. However, other transport pathways of the tropopause aerosol layer remain unclear. In this study, by simulating the dusts from different dust sources individually, we detected the Ethiopian Plateau and the Rocky Mountains are two new transport pathways of the global tropopause dust layer (GTDL). In addition, the contributions of different dust sources to the GTDL were quantified, the mass concentration percentage of dusts originating from Indian peninsula in the GTDL at 100 hPa is 31.5%, which is the largest, followed by those of dusts from Middle East and Northwestern East Asia, dusts from North Africa contribute 17.3% to the GTDL at 100 hPa, which is the smallest. Our results demonstrate the existence of multiple transport pathways of the tropopause aerosol layer and clearly provide the contributions of each dust source to the GTDL.