final_program_abstracts[1]

11 IMSC Session Program
Extreme monthly precipitation over northern and southern
sectors of La Plata Basin in South America- observations and
model simulations
Friday - Poster Session 7
Iracema FA Cavalcanti
Center for Weather Forecasting and Climate Studies- National Institute for Space
Research (CPTEC/INPE), Brazil
The La Plata Basin in South America comprises a large region of four countries:
Brazil, Uruguay, Argentina and Paraguay, which extends from subtropical to
extratropical latitudes. Therefore, the precipitation regimes are different in the
northern and southern sectors. This region undergoes large interannual variability,
with floodings and droughts occurrences which causes social and economic problems,
besides the destructions and deaths. The objective of this study is to analyze the
monthly/interannual variability and frequency of extreme precipitation and associated
features in observed data and model results from an AGCM (CPTEC/COLA AGCM)
and two CGCM (HADCM3 and GFDL). The extreme monthly precipitation in the
two sectors are selected based on the SPI (standardized precipitation index), which
identify extreme wet/dry cases (SPI >=2.0/ SPI