Observational characterization of the downward atmospheric longwave radiation at the surface in the city of São Paulo - Bárbaro, Eduardo; Oliveira, Amauri Pereira de; Soares, Jacyra Ramos; Codato, Georgia; Ferreira, Maurício J; Mlakar, Primoz; Escobedo, João Francisco (Journal of Applied Meteorology and Climatology, 2010)