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Abstract:

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. © 2017, Springer-Verlag GmbH Germany.

Registro:

Documento: Artículo
Título:Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere
Autor:Blázquez, J.; Solman, S.A.
Filiación:Centro de Investigaciones del Mar y la Atmósfera (CIMA-CONICET/FCEN-UBA), CONICET-Universidad de Buenos Aires, Ciudad Universitaria Pabellón II Piso 2, Buenos Aires, C1428EGA, Argentina
Instituto Franco-Argentino para el Estudio del Clima y sus Impactos UMI IFAECI/CNRS-CONICET-UBA, Buenos Aires, Argentina
Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata. (FCAG/UNLP), La Plata, Argentina
Departamento de Ciencias de la Atmósfera y los Océanos DCAO-FCEN-UBA, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:CMIP5 models; Frontal activity; Precipitation; Present climate; Southern Hemisphere; atmospheric front; climate modeling; climatology; CMIP; precipitation (climatology); Southern Hemisphere; winter
Año:2018
Volumen:50
Número:7-8
Página de inicio:2705
Página de fin:2717
DOI: http://dx.doi.org/10.1007/s00382-017-3765-z
Título revista:Climate Dynamics
Título revista abreviado:Clim. Dyn.
ISSN:09307575
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v50_n7-8_p2705_Blazquez

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Citas:

---------- APA ----------
Blázquez, J. & Solman, S.A. (2018) . Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere. Climate Dynamics, 50(7-8), 2705-2717.
http://dx.doi.org/10.1007/s00382-017-3765-z
---------- CHICAGO ----------
Blázquez, J., Solman, S.A. "Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere" . Climate Dynamics 50, no. 7-8 (2018) : 2705-2717.
http://dx.doi.org/10.1007/s00382-017-3765-z
---------- MLA ----------
Blázquez, J., Solman, S.A. "Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere" . Climate Dynamics, vol. 50, no. 7-8, 2018, pp. 2705-2717.
http://dx.doi.org/10.1007/s00382-017-3765-z
---------- VANCOUVER ----------
Blázquez, J., Solman, S.A. Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere. Clim. Dyn. 2018;50(7-8):2705-2717.
http://dx.doi.org/10.1007/s00382-017-3765-z