干旱区生态环境知识资源中心(Arid): Impacts of potential evapotranspiration on drought phenomena in different regions and climate zones

Arid

DOI	10.1016/j.scitotenv.2019.135590
	Impacts of potential evapotranspiration on drought phenomena in different regions and climate zones
	Um, Myoung-Jin 1; Kim, Yeonjoo 2; Park, Daeryong 3; Jung, Kichul 3; Wang, Zhan 4; Kim, Mun Mo 5; Shin, Hongjoon 6
通讯作者	Jung, Kichul
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	703
英文摘要	The present study is aimed at examining whether potential evapotranspiration (PET), which is important for drought assessment, influences a drought index (standardized precipitation evapotranspiration index; SPEI) for different regions and climate zones. The study regions were East Asia, Europe, the United States (US), and West Africa, and the climate zones considered were the arid, semiarid, subhumid, and humid zones. We examined the pattern of water deficits, spatial trend of the SPEI, area ratio of spatial extent, and temporal trend to provide an understanding of drought characteristics. Two datasets, Climate Research Unit (CRU) and National Centers for Environmental Prediction (NCEP), were used for assessing the drought phenomena. Two types of evapotranspiration obtained using Thornthwaite and Penman-Monteith equations were used to estimate the PET. Negative water deficit values were clearly observed in the arid and semiarid zones of the majority of regions, whereas positive water deficit values were observed in the subhumid and humid zones of the regions. The SPEI spatial trend largely presented a decreasing trend in East Asia and West Africa, a neutral or decreasing trend in Europe, and a neutral or increasing trend in the US. The area ratio of the spatial extent showed large values of a neutral or decreasing trend in East Asia and Europe, a neutral or increasing trend in the US, and a decreasing trend in West Africa. The temporal trend of the spatial extent primarily exhibited no trend or an increasing trend in the aforementioned regions, except in the case of the majority of West Africa. Although the results obtained from the two datasets appear to be slightly different, they show that the PET is predominant in regions, especially in the US. The PET trends are identified through comparisons and used to understand the drought phenomena while considering various geographic regions and climatic zones. (c) 2019 Elsevier B.V. All rights reserved.
英文关键词	Drought index Potential evapotranspiration Climate zone Climate Research Unit National Centers for Environmental Prediction
类型	Article
语种	英语
国家	South Korea ; Finland
收录类别	SCI-E
WOS记录号	WOS:000505924300091
WOS关键词	WATER ; INDEX ; SOIL
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-02-10
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312845
作者单位	1.Kyonggi Univ, Dept Civil Engn, Suwon 16227, South Korea; 2.Yonsei Univ, Dept Civil & Environm Engn, Seoul 03722, South Korea; 3.Konkuk Univ, Dept Civil & Environm Engn, Seoul 05029, South Korea; 4.Finnish Meteorol Inst, Helsinki 00560, Finland; 5.Shingu Univ, Dept Civil Engn, Seongnam 13174, South Korea; 6.Korea Hydro & Nucl Power Co Ltd, Cent Res Inst, Daejeon 34101, South Korea
推荐引用方式 GB/T 7714	Um, Myoung-Jin,Kim, Yeonjoo,Park, Daeryong,et al. Impacts of potential evapotranspiration on drought phenomena in different regions and climate zones[J],2020,703.
APA	Um, Myoung-Jin.,Kim, Yeonjoo.,Park, Daeryong.,Jung, Kichul.,Wang, Zhan.,...&Shin, Hongjoon.(2020).Impacts of potential evapotranspiration on drought phenomena in different regions and climate zones.SCIENCE OF THE TOTAL ENVIRONMENT,703.
MLA	Um, Myoung-Jin,et al."Impacts of potential evapotranspiration on drought phenomena in different regions and climate zones".SCIENCE OF THE TOTAL ENVIRONMENT 703(2020).