气候变化领域集成服务门户(CCPortal): Synoptic forcing associated with extreme precipitation events over Southeastern South America as depicted by a CORDEX FPS set of convection-permitting RCMs

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DOI	10.1007/s00382-021-05637-8
	Synoptic forcing associated with extreme precipitation events over Southeastern South America as depicted by a CORDEX FPS set of convection-permitting RCMs
	Lavin-Gullon A.; Feijoo M.; Solman S.; Fernandez J.; da Rocha R.P.; Bettolli M.L.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-09-10
英文摘要	Southeastern South America (SESA) stands out as a remarkable region of occurrence of deep convection. This is mainly due to the proximity of the Andes, which eventually determine their magnitude and intensity. In this work, we used a set of convection-permitting (4 km horizontal resolution) regional climate models to explore their ability to reproduce the synoptic forcings that trigger deep convection over La Plata basin. The study considered simulating three extreme convective precipitation events in two different timescales. On one hand, a short-term simulation initiated a few hours before the onset of each event, spanning 3–4 days. On the other hand, as regional climate modelling, a 6-month simulation that includes the three selected events. In contrast to parameterized convection, the convection-permitting resolutions not only intensified the events, but also modified the location of the maximum precipitation by modulating the low-level atmospheric circulation. Vertically integrated moisture flux convergence emerged as a noticeable footprint of deep moist convection, regardless of the model and timescale. The performance of the models in reproducing the observed precipitation was also quantitatively analyzed. The skill depends on the spatial scale. The results were case-dependent in the short-term simulations. However, an analysis over multiple events in the long-term simulations revealed that, in general, convection-permitting resolutions better capture the spatial distribution of the extreme precipitation in SESA. The study comprises the first multi-model ensemble of convection-permitting simulations over the region, a seed for a further analysis with a more complete ensemble to better understand the results presented here. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
英文关键词	Convection-permitting; Extreme precipitation; Regional climate models; South America
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/183300
作者单位	Grupo de Meteorología, Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain; Centro de Investigaciones del Mar y la Atmósfera (CIMA), CONICET-UBA, Buenos Aires, Argentina; Department of Atmospheric and Ocean Sciences, Faculty of Exact and Natural Sciences, University of Buenos Aires (DCAO-FCEN-UBA) and National Council of Scientific and Technical Research (CONICET), Buenos Aires, Argentina; Grupo de Meteorología, Dept. Matemática Aplicada y Ciencias de la Computación, Universidad de Cantabria, Santander, Spain; Departamento de Ciências Atmosféricas, Universidade de São Paulo (USP), São Paulo, SP, Brazil
推荐引用方式 GB/T 7714	Lavin-Gullon A.,Feijoo M.,Solman S.,et al. Synoptic forcing associated with extreme precipitation events over Southeastern South America as depicted by a CORDEX FPS set of convection-permitting RCMs[J],2021,56(2021-09-10).
APA	Lavin-Gullon A.,Feijoo M.,Solman S.,Fernandez J.,da Rocha R.P.,&Bettolli M.L..(2021).Synoptic forcing associated with extreme precipitation events over Southeastern South America as depicted by a CORDEX FPS set of convection-permitting RCMs.Climate Dynamics,56(2021-09-10).
MLA	Lavin-Gullon A.,et al."Synoptic forcing associated with extreme precipitation events over Southeastern South America as depicted by a CORDEX FPS set of convection-permitting RCMs".Climate Dynamics 56.2021-09-10(2021).