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Artículo

Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere

Blazquez, JosefinaIcon ; Solman, Silvina AliciaIcon
Fecha de publicación: 04/2018
Editorial: Springer
Revista: Climate Dynamics
ISSN: 0930-7575
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

Wintertime fronts climatology and the relationship between fronts and precipitation as depicted by a group of CMIP5 models are evaluated over the Southern Hemisphere (SH). The frontal activity is represented by an index that takes into account the vorticity, the gradient of temperature and the specific humidity at the 850 hPa level. ERA-Interim reanalysis and GPCP datasets are used to assess the performance of the models in the present climate. Overall, it is found that the models can reproduce adequately the main features of frontal activity and front frequency over the SH. The total precipitation is overestimated in most of the models, especially the maximum values over the mid latitudes. This overestimation could be related to the high values of precipitation frequency that are identified in some of the models evaluated. The relationship between fronts and precipitation has also been evaluated in terms of both frequency of frontal precipitation and percentage of precipitation due to fronts. In general terms, the models overestimate the proportion between frontal and total precipitation. In contrast with frequency of total precipitation, the frequency of frontal precipitation is well reproduced by the models, with the higher values located at the mid latitudes. The results suggest that models represent very well the dynamic forcing (fronts) and the frequency of frontal precipitation, though the amount of precipitation due to fronts is overestimated.
Palabras clave: Cmip5 Models , Frontal Activity , Precipitation , Present Climate , Southern Hemisphere
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/58881
DOI: https://dx.doi.org/10.1007/s00382-017-3765-z
URL: https://link.springer.com/article/10.1007/s00382-017-3765-z
Colecciones
Articulos(CIMA) [407]
Articulos de CENTRO DE INVESTIGACIONES DEL MAR Y LA ATMOSFERA
Citación
Blazquez, Josefina; Solman, Silvina Alicia; Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere; Springer; Climate Dynamics; 50; 7-8; 4-2018; 2705-2717
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