A universal multifractal approach to assessment of spatiotemporal extreme precipitation over the Loess Plateau of China

doi:10.5194/hess-24-809-2020

	A universal multifractal approach to assessment of spatiotemporal extreme precipitation over the Loess Plateau of China
	Zhang, Jianjun 1,2,3,5; Gao, Guangyao 3; Fu, Bojie 3; Wang, Cong 3; Gupta, Hoshin, V 4; Zhang, Xiaoping 5; Li, Rui 5
刊名	HYDROLOGY AND EARTH SYSTEM SCIENCES
	2020-02-21
卷号	24 期号:2 页码:809-826
ISSN号	1027-5606
DOI	10.5194/hess-24-809-2020
通讯作者	Gupta, Hoshin, V(hoshin@email.arizona.edu)
英文摘要	Extreme precipitation (EP) is a major external agent driving various natural hazards in the Loess Plateau (LP), China. However, the characteristics of the spatiotemporal EP responsible for such hazardous situations remain poorly understood. We integrate universal multifractals with a segmentation algorithm to characterize a physically meaningful threshold for EP (EPT). Using daily data from 1961 to 2015, we investigate the spatiotemporal variation of EP over the LP. Our results indicate that (with precipitation increasing) EPTs range from 17.3 to 50.3 mm d(-1), while the mean annual EP increases from 35 to 138 mm from the northwestern to the southeastern LP. Further, historically, the EP frequency (EPF) has spatially varied from 54 to 116 d, with the highest EPF occurring in the mid-southern and southeastern LP where precipitation is much more abundant. However, EP intensities tend to be strongest in the central LP, where precipitation also tends to be scarce, and get progressively weaker as we move towards the margins (similarly to EP severity). An examination of atmospheric circulation patterns indicates that the central LP is the inland boundary with respect to the reach and impact of tropical cyclones in China, resulting in the highest EP intensities and EP severities being observed in this area. Under the control of the East Asian monsoon, precipitation from June to September accounts for 72% of the total amount, and 91% of the total EP events are concentrated between June and August. Further, EP events occur, on average, 11 d earlier than the wettest part of the season. These phenomena are responsible for the most serious natural hazards in the LP, especially in the central LP region. Spatiotemporally, 91.4% of the LP has experienced a downward trend in precipitation, whereas 62.1% of the area has experienced upward trends in the EP indices, indicating the potential risk of more serious hazardous situations. The universal multifractal approach considers the physical processes and probability distribution of precipitation, thereby providing a formal framework for spatiotemporal EP assessment at the regional scale.
资助项目	National Natural Science Foundation of China[41701207] ; National Natural Science Foundation of China[41822103] ; State Key Project of Research and Development Plan of China[2016YFC0501603] ; Open Foundation of the State Key Laboratory of Urban and Regional Ecology of China[SKLURE2019-2-5] ; Fundamental Research Funds for the Central Universities of China[2652018034] ; Australian Centre of Excellence for Climate System Science[CE110001028]
WOS关键词	FUTURE CHANGES ; RIVER FLOWS ; RAINFALL ; DEPENDENCE ; BASINS ; SURGE ; EARTH ; SOIL
WOS研究方向	Geology ; Water Resources
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000516714800002
资助机构	National Natural Science Foundation of China ; State Key Project of Research and Development Plan of China ; Open Foundation of the State Key Laboratory of Urban and Regional Ecology of China ; Fundamental Research Funds for the Central Universities of China ; Australian Centre of Excellence for Climate System Science
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/132634]
专题	中国科学院地理科学与资源研究所
通讯作者	Gupta, Hoshin, V
作者单位	1.Minist Nat Resources, Key Lab Land Consolidat & Rehabil, Beijing 100035, Peoples R China 2.China Univ Geosci, Sch Land Sci & Technol, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 4.Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA 5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jianjun,Gao, Guangyao,Fu, Bojie,et al. A universal multifractal approach to assessment of spatiotemporal extreme precipitation over the Loess Plateau of China[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2020,24(2):809-826.
APA	Zhang, Jianjun.,Gao, Guangyao.,Fu, Bojie.,Wang, Cong.,Gupta, Hoshin, V.,...&Li, Rui.(2020).A universal multifractal approach to assessment of spatiotemporal extreme precipitation over the Loess Plateau of China.HYDROLOGY AND EARTH SYSTEM SCIENCES,24(2),809-826.
MLA	Zhang, Jianjun,et al."A universal multifractal approach to assessment of spatiotemporal extreme precipitation over the Loess Plateau of China".HYDROLOGY AND EARTH SYSTEM SCIENCES 24.2(2020):809-826.