Investigation of Entrainment of Transported Dust into Local
Planetary Boundary Layer with Polarization Lidar

Abstract

Abstract: A transported dust case was investigated by using the data of PM2:5 and PM10 from ground monitoring stations and the observation results with 532 nm polarization lidar. Entrainment and convective mixing processes, which were found to play an important role in re-distributing the dust particles, were depicted in detail. At the early stage of the dust episode, dust particles were lifted above 1 km. After the evolution of planetary boundary layer at daytime, the dust particles were entrained into the boundary layer and evenly distributed by convective mixing. At the end of the dust case, the pollution from North China Plain arrived at Wuhan bringing about 4300 tons of anthropogenic aerosols, which is about ten times of the total content of urban aerosols in Wuhan during the 7th CISM Military World Games.

Key words: polarization lidar, mineral dust, entrainment, dust separation algorithm

CLC Number:

P412

YIN Zhenping, YI Fan, ∗, WANG Wei, HE Yun, LIU Fuchao, ZHANG Yunpeng, YU Changming, . Investigation of Entrainment of Transported Dust into Local Planetary Boundary Layer with Polarization Lidar[J]. Journal of Atmospheric and Environmental Optics, 2021, 16(4): 299-306.

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Investigation of Entrainment of Transported Dust into Local Planetary Boundary Layer with Polarization Lidar

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