Assessing Spatial Variation of PBL Height and Aerosol Layer Aloft in São Paulo Megacity Using Simultaneously Two Lidar during Winter 2019

This work presents the use of two elastic lidar systems to assess horizontal variation PBL height (PBLH) and aerosol layer aloft in São Paulo Megacity. These lidars performed simultaneous measurements 10.7 km apart a highly urbanized relatively flat area for winter months 2019. The results showed that PBLH differences display diurnal depends on during daytime growth phases. Cloud sea breeze effects control most variation. In absence cloud breeze, maximum difference (~300 m) occurs rapid development stage is due topographic effects. When approaches its daily value, it tends level off with respect topography. addition, was presented method combines (to detect an layer) satellite data classify such from Aerosol Optical Depth (AOD) Index (AI) information) detection biomass burning events. methodology demonstrated variations caused by Biomass Burning AOD AI enable both plumes originating identification their origin.