气候变化领域集成服务门户(CCPortal): Assessing downscaling techniques for frequency analysis, total precipitation and rainy day estimation in CMIP6 simulations over hydrological years

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DOI	10.5194/hess-28-1981-2024
	Assessing downscaling techniques for frequency analysis, total precipitation and rainy day estimation in CMIP6 simulations over hydrological years
	Jimenez, David A.; Menapace, Andrea; Zanfei, Ariele; Pinto, Eber Jose de Andrade; Brentan, Bruno
发表日期	2024
ISSN	1027-5606
EISSN	1607-7938
起始页码	28
结束页码	9
卷号	28 期号:9
英文摘要	General circulation models generate climate simulations on grids with resolutions ranging from 50 to 600 km. The resulting coarse spatial resolution of the model outcomes requires post-processing routines to ensure reliable climate information for practical studies, prompting the widespread application of downscaling techniques. However, assessing the effectiveness of multiple downscaling techniques is essential, as their accuracy varies depending on the objectives of the analysis and the characteristics of the case study. In this context, this study aims to evaluate the performance of downscaling the daily precipitation series in the Metropolitan Region of Belo Horizonte (MRBH), Brazil, with the final scope of performing frequency analyses and estimating total precipitation and the number of rainy days per hydrological year at both annual and multiannual levels. To develop this study, 78 climate model simulations with a horizontal resolution of 100 km, which participated in the SSP1-2.6 and/or SSP5-8.5 scenarios of CMIP6, are employed. The results highlight that adjusting the simulations from the general circulation models by the delta method, quantile mapping and regression trees produces accurate results for estimating the total precipitation and number of rainy days. Finally, it is noted that employing downscaled precipitation series through quantile mapping and regression trees also yields promising results in terms of the frequency analyses.
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001214898600001
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295472
作者单位	Universidade Federal de Minas Gerais; Free University of Bozen-Bolzano
推荐引用方式 GB/T 7714	Jimenez, David A.,Menapace, Andrea,Zanfei, Ariele,et al. Assessing downscaling techniques for frequency analysis, total precipitation and rainy day estimation in CMIP6 simulations over hydrological years[J],2024,28(9).
APA	Jimenez, David A.,Menapace, Andrea,Zanfei, Ariele,Pinto, Eber Jose de Andrade,&Brentan, Bruno.(2024).Assessing downscaling techniques for frequency analysis, total precipitation and rainy day estimation in CMIP6 simulations over hydrological years.HYDROLOGY AND EARTH SYSTEM SCIENCES,28(9).
MLA	Jimenez, David A.,et al."Assessing downscaling techniques for frequency analysis, total precipitation and rainy day estimation in CMIP6 simulations over hydrological years".HYDROLOGY AND EARTH SYSTEM SCIENCES 28.9(2024).