Comparing analysis of MM5 mesoscale model simulations and observating meteorologic datasets in Galeão/RJ

Abstract

The main objective of this study is to analyze the MM5 Mesoscale Model results comparing with observational datasets in surface and altitude from meteorological station of Galeão International Airport- RIO DE JANEIRO. These datasets are used to evaluate wind direction and intensity, temperature and relative humidity in surface and altitude. Simulations for two periods of July 2003 were carried through days 10-12 when a frontal system cross Rio de Janeiro, and days 13-15, characterized by presence of high-pressure system over continent. The 10m wind direction are well simulated, but results had demonstrated a trend of model to underestimate wind intensity. The best model results are in 1-3 m/s intensity band. The simulations got better results in reproducing wind and temperature vertical profiles than dewpoint temperature profiles and relative humidity for the analyzed periods.