CR 09:101-105 (1997)  -  DOI: https://doi.org/10.3354/cr009101

Performance of general circulation models in southeastern South America

Raúl Hofstadter1,*, Mario Bidegain2

1Estudio País sobre Cambio Climático, Comisión Nacional sobre Cambio Global, Ciudadela 1414, piso 6, 11100 Montevideo, Uruguay
2Dirección Nacional de Meteorología, Javier Barrios Amorín 1488, 11200 Montevideo, Uruguay

Outputs from 5 general circulation models (GCMs) were analyzed in order to evaluate their performance for estimating future climate conditions in the temperate zone of southeastern South America (24° to 38°S and 50° to 65°W). The GCMs analyzed were: GISS (Goddard Institute for Space Science), GFDL-R30 and GFDL 1% (Geophysical Fluid Dynamics Laboratory), UKMO (United Kingdom Meteorological Office), and CCCM (Canadian Climate Center Model). The variables under study were mean monthly temperature and mean daily precipitation. The degree to which the models represent current climate was estimated by comparing model outputs with observed climate values for the 1951 to 1970 period by means of a correlation analysis. The temperature values estimated by the models showed a good fit with the observed values. However, fitting of precipitation values was not statistically significant. This study was carried out within the framework of the Uruguay Climate Change Country Study as a basis for assessing the impact of climate change on the agricultural sector.


General circulation models · Climate change · Climate scenarios · Climate simulation


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