The city of São Paulo, together with 38 other smaller cities, forms the Metropolitan Region of São Paulo (MRSP). This region, located about 60 km far from the Atlantic Ocean, is occupied by 20.5 millions of inhabitants and has approximately 7 million of vehicles. The seasonal variation of moisture field in MRSP is modulated by local climate features associate to geographic position and by urban landuse. Its diurnal evolution is strongly affected by the horizontal advection caused by systematic penetration of Sea Breeze and by the diurnal evolution of urban PBL (Fig 1). In this work the role played by the diurnal evolution of the urban PBL in the moisture content of the MRSP will be investigated using LES model.
