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          Institute: MPI für Meteorologie     Collection: Atmosphere in the Earth System     Display Documents

ID: 474590.0, MPI für Meteorologie / Atmosphere in the Earth System
Downscaling extreme month-long anomalies in southern South America
Authors:Menéndez, C. G.; de Castro, M.; Boulanger, J.-P.; D'Onofrio, A.; Sanchez, E.; Sörensson, A. A.; Blazquez, J.; Elizalde, A.; Jacob, D.; Le Treut, H.; Li, Z. X.; Núñez, M. N.; Pessacg, N.; Pfeiffer, S.; Rojas, M.; Rolla, A.; Samuelsson, P.; Solman, S. A.; Teichmann, C.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Climatic Change
Start Page:379
End Page:403
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:We investigate the performance of one stretched-grid atmospheric global model, five different regional climate models and a statistical downscaling technique in simulating 3 months (January 1971, November 1986, July 1996) characterized by anomalous climate conditions in the southern La Plata Basin. Models were driven by reanalysis (ERA-40). The analysis has emphasized on the simulation of the precipitation over land and has provided a quantification of the biases of and scatter between the different regional simulations. Most but not all dynamical models underpredict precipitation amounts in south eastern South America during the three periods. Results suggest that models have regime dependence, performing better for some conditions than others. The models' ensemble and the statistical technique succeed in reproducing the overall observed frequency of daily precipitation for all periods. But most models tend to underestimate the frequency of dry days and overestimate the amount of light rainfall days. The number of events with strong or heavy precipitation tends to be under simulated by the models.
External Publication Status:published
Document Type:Article
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/Atmosphere in the Earth System
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