Physical and chemical characterization of the 2019 "black rain" event in the Metropolitan Area of Sao Paulo, Brazil - Pereira, Guilherme Martins; Caumo, Sofia Ellen da Silva; Grandis, Adriana; Correia, Alexandre Lima; Barbosa, Henrique de Melo Jorge; Marcondes, Marta Angela; Buckeridge, Marcos; Vasconcellos, Pérola de Castro (Atmospheric Environment, 2021)