Entropy-Aided Evaluation of Meteorological Droughts Over China
文献类型：期刊论文
| 作者 | Sang, Yan-Fang1,2; Singh, Vijay P.3,4; Hu, Zengyun5; Xie, Ping6; Li, Xinxin1,7 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
 |
| 出版日期 | 2018-01-27 |
| 卷号 | 123期号:2页码:740-749 |
| 关键词 | information entropy drought precipitation statistical characteristics climate change |
| ISSN号 | 2169-897X |
| DOI | 10.1002/2017JD026956 |
| 通讯作者 | Sang, Yan-Fang(sangyf@igsnrr.ac.cn) |
| 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. |
| WOS关键词 | PRECIPITATION EVAPOTRANSPIRATION INDEX ; HYDROLOGICAL DROUGHTS ; UNITED-STATES ; INFORMATION ; TEMPERATURE ; SENSITIVITY ; IMPACTS ; EVENTS ; EUROPE ; HAZARD |
| 资助项目 | National Natural Science Foundation of China[91647110] ; National Natural Science Foundation of China[91547205] ; National Natural Science Foundation of China[11401569] ; National Natural Science Foundation of China[41330529] ; Program for the Bingwei Excellent Talents from the Institute of Geographic Sciences and Natural Resources Research, CAS ; Youth Innovation Promotion Association CAS[2017074] ; National Mountain Flood Disaster Investigation Project[SHZH-IWHR-57] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000425520200007 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; Program for the Bingwei Excellent Talents from the Institute of Geographic Sciences and Natural Resources Research, CAS ; Youth Innovation Promotion Association CAS ; National Mountain Flood Disaster Investigation Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/56980]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sang, Yan-Fang |
| 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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