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

Autor(es)

Moreira, Gregori de Arruda ; de Oliveira, Amauri Pereira ; Codato, Georgia ; Sanchez, Maciel Pinero ; Tito, Janet Valdes ; Hussni e Silva, Leonardo Alberto ; da Silveira, Lucas Cardoso ; da Silva, Jonatan Joao ; da Silva Lopes, Fabio Juliano ; Landulfo, Eduardo

• Tipo de documento: Artigo Científico
• Fonte: ATMOSPHERE; v. 13, n. 4, p. 16-pg., 2022-04-01.

Resumo

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

• Processo FAPESP: 20/07141-2 - Emissões biogênicas, química e impactos na Região Metropolitana de São Paulo: BIOMASP+
• Beneficiário: Adalgiza Fornaro
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/50178-5 - Micrometeorologia urbana tropical aplicada às mudanças climáticas das regiões metropolitanas de São Paulo e Rio de Janeiro
• Beneficiário: Amauri Pereira de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular