EVALUATION OF THE ENSEMBLE OF PHYSICAL PARAMETERIZATIONS OF THE MM5 MODEL IN THE EVENT OF INTENSE RAINFALL OCCURRED BETWEEN THE 5TH AND THE 6TH OF APRIL OF 2010 IN THE RIO DE JANEIRO CITY
DOI:
https://doi.org/10.5902/2179460X17116Keywords:
MM5, ensemble de parametrizações físicas, eventos severosAbstract
The city of Rio de Janeiro is often affected by meteorological systems that cause intense rainfalls. These events bring about economic and social disruptions of significant magnitude. This paper analyses the meteorological event occurred between the 05th and 06th of April 2010 in the city of Rio de Janeiro, using numerical modelling by MM5 model (PSU/NCAR Mesoscale Model). From 20h of the 5th until 8h of the 6th there was on average 178 mm of rainfall in the this city, almost twice the expected for April, bringing about floods, landslides, and many deaths. In this study, eight parameterization groups were used, with different configurations of cloud microphysics, cumulus and atmospheric boundary layer. Two simulation rounds were performed, starting at different times and the simulation results were compared with the observed precipitation data, obtained from pluviometric stations from the “Alerta-Rio” system. Thus, it was possible to analyse the effectiveness of the MM5 model for prognosticate extreme rainfall events as some of the model configurations have captured the position and/or intensity of the cores with intense rainfall with a three-hour time gap in some cases. Therefore, this prognostic model had proven that it can be a useful tool to forecast and reduce the consequences of extreme rainfall events in Rio de Janeiro city.Downloads
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