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  Performance of a multi-RCM ensemble for South Eastern South America

Carril, A., Menéndez, C., Remedio, A., Robledo, F., Sörensson, A., Tencer, B., et al. (2012). Performance of a multi-RCM ensemble for South Eastern South America. Climate Dynamics, 39, 2747-2768. doi:10.1007/s00382-012-1573-z.

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Carril, A.F., Autor
Menéndez, C.G., Autor
Remedio, Armelle1, 2, Autor           
Robledo, F., Autor
Sörensson, A., Autor
Tencer, B., Autor
Boulanger, J.-P., Autor
de Castro, M., Autor
Jacob, Daniela1, Autor           
Le Treut, H., Autor
Li, L.Z.X., Autor
Penalba, O., Autor
Pfeifer, Susanne, Autor           
Rusticucci, M., Autor
Salio, P., Autor
Samuelsson, P., Autor
Sanchez, E., Autor
Zaninelli, P., Autor
Affiliations:
1The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913550              
2IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913547              

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Schlagwörter: Multi-RCM ensemble validation; Regional climate models; South America; South Eastern South America
 Zusammenfassung: The ability of four regional climate models to reproduce the present-day South American climate is examined with emphasis on La Plata Basin. Models were integrated for the period 1991-2000 with initial and lateral boundary conditions from ERA-40 Reanalysis. The ensemble sea level pressure, maximum and minimum temperatures and precipitation are evaluated in terms of seasonal means and extreme indices based on a percentile approach. Dispersion among the individual models and uncertainties when comparing the ensemble mean with different climatologies are also discussed. The ensemble mean is warmer than the observations in South Eastern South America (SESA), especially for minimum winter temperatures with errors increasing in magnitude towards the tails of the distributions. The ensemble mean reproduces the broad spatial pattern of precipitation, but overestimates the convective precipitation in the tropics and the orographic precipitation along the Andes and over the Brazilian Highlands, and underestimates the precipitation near the monsoon core region. The models overestimate the number of wet days and underestimate the daily intensity of rainfall for both seasons suggesting a premature triggering of convection. The skill of models to simulate the intensity of convective precipitation in summer in SESA and the variability associated with heavy precipitation events (the upper quartile daily precipitation) is far from satisfactory. Owing to the sparseness of the observing network, ensemble and observations uncertainties in seasonal means are comparable for some regions and seasons. © 2012 Springer-Verlag Berlin Heidelberg.

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Sprache(n): eng - English
 Datum: 20122012-12
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1007/s00382-012-1573-z
 Art des Abschluß: -

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Titel: Climate Dynamics
  Andere : Clim. Dyn.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Heidelberg : Springer-International
Seiten: - Band / Heft: 39 Artikelnummer: - Start- / Endseite: 2747 - 2768 Identifikator: ISSN: 0930-7575
CoNE: https://pure.mpg.de/cone/journals/resource/954925568800