globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00382-017-3765-z
Scopus记录号: 2-s2.0-85020499194
论文题名:
Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere
作者: Blázquez J.; Solman S.A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期:2018-07-08
起始页码: 2705
结束页码: 2717
语种: 英语
英文关键词: CMIP5 models ; Frontal activity ; Precipitation ; Present climate ; Southern Hemisphere
Scopus关键词: atmospheric front ; climate modeling ; climatology ; CMIP ; precipitation (climatology) ; Southern Hemisphere ; winter
英文摘要: 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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109387
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: 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

Recommended Citation:
Blázquez J.,Solman S.A.. Fronts and precipitation in CMIP5 models for the austral winter of the Southern Hemisphere[J]. Climate Dynamics,2018-01-01,50(2018-07-08)
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