Analysis of differences between thermodynamic and material boundary layer structure: Comparison of detection by ceilometer and microwave radiometer

摘要: Abstract Planetary boundary layer height (PBLH) is a key parameter for air quality prediction and meteorology studies. The of thermodynamic (Hθ) material (HC) in different seasons are compared by using microwave radiometer (MWR) ceilometer. There considerable differences between Hθ HC the causes further studied. We found that when markedly stable at night, MWR's algorithm used to estimate PBLH has retrieval restriction directly leads much higher than (1 2.5 km higher). This unrealistic can be identified eliminated effectively temperature from surface 1 km. During periods transportation diffusion aerosols, strong southerly winds transporting pollutants northward above or northerly throughout removing will cause (0.5 2 km However, occurs lower within Hθ, consistent. aerosol layers able characterize multiple-layered structure nocturnal (NBL) evolution backscatter. (SBL) ranges 0.3 0.6 km night. Compared with idealized layer, there isn't distinct SBL growing mixing (ML) after sunrise. residual (RL) 0.5 1.5 km, it lasts 4 5 h sunrise shows up again 2 h sunset. maximum detectable range Doppler Lidar large backscatter gradient, so strongly consistent RL night ML daytime during pollution event. combined observation ceilometer well reveal completed characteristics structures.