气候变化领域集成服务门户(CCPortal): Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach

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DOI	10.1007/s00382-021-05770-4
	Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
	Solman S.A.; Bettolli M.L.; Doyle M.E.; Olmo M.E.; Feijoo M.; Martinez D.; Blázquez J.; Balmaceda Huarte R.
发表日期	2021
ISSN	0930-7575
起始页码	929
结束页码	950
英文摘要	A collection of 10 high-impact extreme precipitation events occurring in Southeastern South America during the warm season has been analyzed using statistical (ESD) and dynamical downscaling approaches. Regional Climate Models from the CORDEX database for the South American domain at two horizontal resolutions, 50 km and 25 km, short-term simulations at 20 km and at 4 km convective-permitting resolution and statistical downscaling techniques based on the analogue method and the generalized linear model approach were evaluated. The analysis includes observational datasets based on gridded data, station data and satellite products that allow assessing the observational uncertainty that characterizes extreme events in the region. It is found that the ability of the modelling strategies in capturing the main features of the extreme rainfall varies across the events. The higher the horizontal resolution of the models, the more intense and localized the core of the rainfall event, being the location of the exit region of the low-level jet and the low-level moisture flux convergence during the initial stages of the events the most relevant features that determine models’ ability of capturing the location and intensity of the core of the heavy rainfall. ESD models based on the generalized linear approach overestimate the spatial extension of the events and underestimate the intensity of the local maxima. Weather-like convective-permitting simulations depict an overall good performance in reproducing both the rainfall patterns and the triggering mechanisms of the extreme events as expected, given that these simulations are strongly controlled by the initial conditions. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Convective permitting simulations; Extreme precipitation events; Southeastern South America; Statistical and dynamical downscaling
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183480
作者单位	Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias de la Atmósfera y los Océanos, Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Centro de Investigaciones del Mar y la Atmósfera (CIMA), Buenos Aires, Argentina; CNRS – IRD – CONICET – UBA, Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (IRL 3351 IFAECI), Buenos Aires, Argentina; Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Solman S.A.,Bettolli M.L.,Doyle M.E.,et al. Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach[J],2021.
APA	Solman S.A..,Bettolli M.L..,Doyle M.E..,Olmo M.E..,Feijoo M..,...&Balmaceda Huarte R..(2021).Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach.Climate Dynamics.
MLA	Solman S.A.,et al."Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach".Climate Dynamics (2021).