Simulação da variabilidade do clima presente sobre a América do Sul utilizando um modelo climático regional / Present-day climate variability simulations over South America using a climate regional model

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The purpose of this work was to evaluate the accuracy of The Hadley Centre Regional Climate Model (HadRM3P) in describing the seasonal variability of the main climatological features over South America and adjacent (surrounding) oceans by using long-term simulations (30 years, 1961-1990). The analysis was performed using seasonal averages from observed and simulated precipitation, temperature, sea level pressure and wind (850 and 200 hPa). The impact of lateral boundary conditions and two different sea surface temperature (SST) conditions (1983 El Niño and 1985 La Niña) on the simulated climate and on the accuracy in simulating both interannual and seasonal variability was studied subjectively and objectively (skill scores). Precipitation and temperature patterns in space and time as well as the main general circulation features, including details captured by the model at finer scales than those resolved by global model were simulated by the model. However, regionally, there are still systematic errors which might be related to the physics of the model (convective schemes, topography and land surface processes) and the lateral boundary conditions inherited from the global model.

ASSUNTO(S)

meteorologia tropical meteorology downscaling regional climate model predictability modelo climático regional climatology downscaling climatologia meteorologia previsibilidade tropical meteorology

ACESSO AO ARTIGO

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