干旱区生态环境知识资源中心(Arid): Changes in Unevenness of Wet-Day Precipitation Over China During 1961-2020

Arid

DOI	10.1029/2020JD034483
	Changes in Unevenness of Wet-Day Precipitation Over China During 1961-2020
	Han, Jingya; Miao, Chiyuan; Duan, Qingyun; Wu, Jingwen; Gou, Jiaojiao; Zheng, Haiyan
通讯作者	Miao, CY (corresponding author), Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
卷号	126 期号:19
英文摘要	Precipitation falls unevenly in space and time, which has significant consequences for human society and natural ecosystems. Based on 2,134 gauged observations during 1961-2020 and historical simulations of 14 models participating in the Coupled Model Intercomparison Project Phase 6 (CMIP6), we analyze precipitation unevenness over China in terms of the spatiotemporal distribution of wet days (>1 mm) and wet-day precipitation amount throughout the year. We also explore precipitation extremes related to the unevenness. Spatially, precipitation shows medium unevenness in China. Temporally, the unevenness in distribution of wet days increases from southeast (generally humid) to northwest (generally arid). This temporal unevenness weakened in large parts of western China during 1991-2020 relative to 1961-1990. As for precipitation amount, the distribution of precipitation that falls on wet days is more uneven in water-limited regions compared with humid regions. Associated with this unevenness, between 1961 and 2020, the top 50% of annual precipitation fell in approximately the 12 wettest days, and the maximum 1-day precipitation for the year contributed 10% on average to annual precipitation. The period 1991-2020 shows overall greater unevenness in eastern China and less unevenness in western China relative to the first 30 years. Multimodel ensemble means of CMIP6 simulations agree with the basic spatial pattern of observations, while underestimating the magnitude of temporal unevenness of precipitation. If these regional differences in precipitation unevenness were to persist over time, this would likely create some new challenges for water resource management in these areas, e.g., flash drought.
英文关键词	spatiotemporal unevenness precipitation CMIP6 China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000706310300013
WOS关键词	SPATIAL-DISTRIBUTION ; CLIMATE ; TRENDS ; INTERMITTENCY ; INTENSITY ; FREQUENCY ; DURATION ; EXTREMES ; RAIN ; ASIA
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363892
作者单位	[Han, Jingya; Miao, Chiyuan; Duan, Qingyun; Wu, Jingwen; Gou, Jiaojiao; Zheng, Haiyan] Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Han, Jingya,Miao, Chiyuan,Duan, Qingyun,et al. Changes in Unevenness of Wet-Day Precipitation Over China During 1961-2020[J]. 北京师范大学,2021,126(19).
APA	Han, Jingya,Miao, Chiyuan,Duan, Qingyun,Wu, Jingwen,Gou, Jiaojiao,&Zheng, Haiyan.(2021).Changes in Unevenness of Wet-Day Precipitation Over China During 1961-2020.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(19).
MLA	Han, Jingya,et al."Changes in Unevenness of Wet-Day Precipitation Over China During 1961-2020".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.19(2021).