Abstract Via combining aerosol vertical profiles from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) and assimilated multi-layer wind profiles from the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2), the horizontal aerosol cross-boundary transport for the Edmonton-Calgary Corridor (ECC) during 2011–2017 was characterized on the basis of aerosol extinction flux. The western and northern boundaries (WB and NB) were revealed as the two aerosol importing gateways for ECC, with the annual mean cross-boundary efficiencies of 0.286 ± 0.231 hr−1 for WB and 0.050 ± 0.025 hr−1 for NB. The annual mean efficiency of the cross eastern boundary (EB) aerosol transport was −0.267 ± 0.243 hr−1, indicating an overall aerosol exporting effect for ECC. More efficient cross southern boundary (SB) aerosol importing processes were found in July (0.049 ± 0.071 hr−1) and August (0.043 ± 0.058 hr−1), which favor the outbreak of Pacific Northwest wildfires. The aerosol emissions from Athabasca oil sands region (AOSR) in Alberta are unlikely to have significant impact on ECC via the cross-NB aerosol transport pathway. The annual mean aerosol extinction flow of 202 ± 2244 km2/h suggested the cross-boundary aerosol importing effect for ECC. The most significant aerosol importing effect for ECC was found in fall, indicated by seasonal mean aerosol extinction flow of 680 ± 1122 km2/h. The observed seasonal variation implied the noticeable influences of aerosol local emissions and cloud-aerosol interactions on ECC aerosol loadings in winter and summer. To obtain a complete picture of aerosol loading budget over ECC, further investigations on the dynamics of aerosol emissions and depositions happened in the ECC atmosphere remain.

中文翻译：

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基于 2011-2017 年 CALIPSO 和 MERRA-2 数据的加拿大埃德蒙顿-卡尔加里走廊跨界气溶胶通量估算

摘要 通过将云-气溶胶激光雷达和红外探路者卫星观测 (CALIPSO) 的气溶胶垂直剖面与研究与应用版本 2 (MERRA-2) 的现代时代回顾性分析的同化多层风剖面相结合，水平气溶胶交叉- 2011-2017 年埃德蒙顿-卡尔加里走廊 (ECC) 的边界传输基于气溶胶消光通量进行了表征。西部和北部边界（WB 和 NB）被揭示为 ECC 的两个气溶胶进口网关，WB 的年平均跨界效率为 0.286 ± 0.231 hr-1，NB 为 0.050 ± 0.025 hr-1。跨东边界 (EB) 气溶胶传输的年平均效率为 -0.267 ± 0.243 hr-1，表明 ECC 的整体气溶胶输出效应。在 7 月 (0.049 ± 0.071 hr-1) 和 8 月 (0.043 ± 0.058 hr-1) 发现了更有效的跨南部边界 (SB) 气溶胶输入过程，这有利于太平洋西北野火的爆发。阿尔伯塔省阿萨巴斯卡油砂地区 (AOSR) 的气溶胶排放不太可能通过跨 NB 气溶胶传输途径对 ECC 产生重大影响。202 ± 2244 km2/h 的年平均气溶胶消光流量表明 ECC 的跨界气溶胶输入效应。ECC 最显着的气溶胶输入效应出现在秋季，季节性平均气溶胶消光流量为 680 ± 1122 km2/h。观测到的季节性变化暗示了气溶胶局部排放和云-气溶胶相互作用对冬季和夏季 ECC 气溶胶载荷的显着影响。