气候变化领域集成服务门户(CCPortal): The potential added value of Regional Climate Models in South America using a multiresolution approach

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DOI	10.1007/s00382-019-05073-9
	The potential added value of Regional Climate Models in South America using a multiresolution approach
	Falco M.; Carril A.F.; Li L.Z.X.; Cabrelli C.; Menéndez C.G.
发表日期	2020
ISSN	0930-7575
起始页码	1553
结束页码	1569
卷号	54
英文摘要	This paper aims to identify those regions within the South American continent where the Regional Climate Models (RCMs) have the potential to add value (PAV) compared to their coarser-resolution global forcing. For this, we used a spatial-scale filtering method based on the wavelet theory to distinguish the regional climatic signal present in atmospheric surface fields from observed data (CPC and TRMM) and 6 RCM simulations belonging to the CORDEX Project. The wavelet used for filtering was Haar wavelet, but a comparative analysis with Daubechies 4 wavelet indicated that meteorological fields or regional indices were not very sensitive to the wavelet selected. Once the longer wavelengths were filtered, we focused on analyzing the spatial variability of extreme rainfall and the spatiotemporal variability of maximum and minimum surface air temperature on a daily basis. The results obtained suggest essential differences in the spatial distribution of the small-scale signal of extreme precipitation between TRMM and regional models, together with a large dispersion between models. While TRMM and CPC register a large signal throughout the continent, the RCMs place it over the Andes Cordillera and some over tropical South America. PAV signal for surface air temperature was found over the Andes Cordillera and the Brazilian Highlands, which are regions characterized by complex topography, and also on the coasts of the continent. The signal came specially from the small-scale stationary component. The transient part is much smaller than the stationary one, except over la Plata Basin where they are of the same order of magnitude. Also, the RCMs and CPC showed a large spread between them in representing this transient variability. The results confirm that RCMs have the potential to add value in the representation of extreme precipitation and the mean surface temperature in South America. However, this condition is not applicable throughout the whole continent but is particularly relevant in those terrestrial regions where the surface forcing is strong, such as the Andes Cordillera or the coasts of the continent. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Added value; CORDEX; Regional Climate Model; South America; Wavelet
语种	英语
scopus关键词	air temperature; climate modeling; meteorology; rainfall; regional climate; spatial variation; temporal variation; wavelet analysis; Andes; La Plata Basin
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/145625
作者单位	Centro de Investigaciones del Mar y la Atmósfera (CIMA), CONICET-UBA, Ciudad Universitaria, Ciudad Autónoma de Buenos Aires, Int. Guiraldes 2160, Pabellón 2, Piso 2, Buenos Aires, C1428EGA, Argentina; Instituto Franco-Argentino Sobre Estudios de Clima y sus Impactos (UMI3351-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina; Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Laboratoire de Météorologie Dynamique (LMD), CNRS, Sorbonne Université, École Normale Supérieure, École Polytechnique, Paris, France; Instituto de Matemática “Luis Santaló” (IMAS-CONICET-UBA), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Falco M.,Carril A.F.,Li L.Z.X.,et al. The potential added value of Regional Climate Models in South America using a multiresolution approach[J],2020,54.
APA	Falco M.,Carril A.F.,Li L.Z.X.,Cabrelli C.,&Menéndez C.G..(2020).The potential added value of Regional Climate Models in South America using a multiresolution approach.Climate Dynamics,54.
MLA	Falco M.,et al."The potential added value of Regional Climate Models in South America using a multiresolution approach".Climate Dynamics 54(2020).