Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026956 |
Entropy-Aided Evaluation of Meteorological Droughts Over China | |
Sang, Yan-Fang1,2; Singh, Vijay P.3,4; Hu, Zengyun5; Xie, Ping6; Li, Xinxin1,7 | |
2018-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
![]() |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:2页码:740-749 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Evaluation of drought and its spatial distribution is essential to develop mitigation measures. In this study, we employed the entropy index to investigate the spatiotemporal variability of meteorological droughts over China. Entropy values, with a reliable hydrological and geographical basis, are closely related to the months of precipitation deficit and its mean magnitude and can thus represent the physical formation of droughts. The value of entropy index can be roughly classified as <0.35, 0.36-0.90, and >0.90, reflecting high, middle, and low occurrence probabilities of droughts. The accumulated precipitation deficits, based on the standardized precipitation-evapotranspiration index at the 1, 3, 6, and 12month scales, consistently increase with entropy decrease, no matter considering the moderately, severely, or extremely dry conditions. Therefore, Northwest China and North China, with smaller entropy values, have higher occurrence probability of droughts than South China, with a break at 38 degrees N latitude. The aggravating droughts in North China and Southwest China over recent decades are represented by the increase in both the occurrence frequency and the magnitude. The entropy, determined by absolute magnitude of the difference between precipitation and potential evapotranspiration, as well as its scatter and skewness characteristics, is easily calculated and can be an effective index for evaluating drought and its spatial distribution. We therefore identified dominant thresholds for entropy values and statistical characteristics of precipitation deficit, which would help evaluate the occurrence probability of droughts worldwide. |
英文关键词 | information entropy drought precipitation statistical characteristics climate change |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425520200007 |
WOS关键词 | HYDROLOGICAL DROUGHTS ; TEMPERATURE ; INDEX ; INFORMATION ; SENSITIVITY ; IMPACTS ; EVENTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32401 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX USA; 4.Texas A&M Univ, Zachry Dept Civil Engn, College Stn, TX USA; 5.Hong Kong Baptist Univ, Dept Geog, Hong Kong, Hong Kong, Peoples R China; 6.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China; 7.Univ Chinese Acad Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Sang, Yan-Fang,Singh, Vijay P.,Hu, Zengyun,et al. Entropy-Aided Evaluation of Meteorological Droughts Over China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(2):740-749. |
APA | Sang, Yan-Fang,Singh, Vijay P.,Hu, Zengyun,Xie, Ping,&Li, Xinxin.(2018).Entropy-Aided Evaluation of Meteorological Droughts Over China.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),740-749. |
MLA | Sang, Yan-Fang,et al."Entropy-Aided Evaluation of Meteorological Droughts Over China".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):740-749. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论