干旱区生态环境知识资源中心(Arid): Spatiotemporal characteristics of agricultural droughts based on soil moisture data in Inner Mongolia from 1981 to 2019

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DOI	10.1016/j.jhydrol.2021.127104
	Spatiotemporal characteristics of agricultural droughts based on soil moisture data in Inner Mongolia from 1981 to 2019
	Cai, Shuohao; Song, Xiaoning; Hu, Ronghai; Leng, Pei; Li, Xiaotao; Guo, Da; Zhang, Ya'nan; Hao, Yanbin; Wang, Yanfen
通讯作者	Song, XN (corresponding author), Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	603
英文摘要	As the critical parameter of the agricultural drought process, soil moisture (SM) has the potential to monitor agricultural drought, which can provide practical support for water management. In this study, a drought index, namely Soil Dryness Index (SDI), was proposed based on long-term gridded ERA-5 land SM, and its performance was evaluated. Furthermore, we employed the run theory and copula to study the spatiotemporal drought characteristics based on this index in Inner Mongolia. Although the return period of drought events has been assessed in many studies, the drought tends to occur with a nonstationary frequency. The wavelet transform was then applied to drought area proportion time series in sub-regions to study the temporal characteristics of droughts. The results show that SDI performs well in monitoring agricultural drought. There is strong heterogeneity in the spatial distribution of drought events. Frequent and low-severity droughts dominated arid and semi-arid regions, while some high-severity droughts mainly occurred in humid and semi-humid regions (mainly in Hulunbuir and Xing'an). The droughts, especially those with high severity, have become much more frequent in the last two decades. The period from 2000 to 2010 had seen more frequent droughts in recent 40 years, and most 20-year return period droughts occurred during this period. These findings could contribute to a better understanding of spatiotemporal patterns of agricultural droughts and provide a reference for future drought trends in Inner Mongolia.
英文关键词	Soil moisture Soil dryness index Agricultural drought Copula Wavelet transform Inner Mongolia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000715326800034
WOS关键词	TEMPORAL VARIABILITY ; RETURN PERIOD ; WATER-CONTENT ; SEVERITY ; CLIMATE ; DURATION ; CHINA ; PLATEAU ; INDEX ; FREQUENCY
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368122
作者单位	[Cai, Shuohao; Song, Xiaoning; Hu, Ronghai; Guo, Da; Zhang, Ya'nan; Wang, Yanfen] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Cai, Shuohao; Song, Xiaoning; Hu, Ronghai; Guo, Da; Zhang, Ya'nan; Hao, Yanbin; Wang, Yanfen] Univ Chinese Acad Sci, Yanshan Earth Crit Zone & Surface Fluxes Res Stn, Beijing 101408, Peoples R China; [Leng, Pei] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr & Rural Affairs, Key Lab Agr Remote Sensing, Beijing 100081, Peoples R China; [Li, Xiaotao] China Inst Water Resources & Hydropower Res, Beijing 100038, Peoples R China; [Hao, Yanbin] Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cai, Shuohao,Song, Xiaoning,Hu, Ronghai,et al. Spatiotemporal characteristics of agricultural droughts based on soil moisture data in Inner Mongolia from 1981 to 2019[J],2021,603.
APA	Cai, Shuohao.,Song, Xiaoning.,Hu, Ronghai.,Leng, Pei.,Li, Xiaotao.,...&Wang, Yanfen.(2021).Spatiotemporal characteristics of agricultural droughts based on soil moisture data in Inner Mongolia from 1981 to 2019.JOURNAL OF HYDROLOGY,603.
MLA	Cai, Shuohao,et al."Spatiotemporal characteristics of agricultural droughts based on soil moisture data in Inner Mongolia from 1981 to 2019".JOURNAL OF HYDROLOGY 603(2021).