Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4740 |
A revised drought index based on precipitation and pan evaporation | |
Li, Binquan1,2,3; Liang, Zhongmin1; Zhang, Jianyun2,4; Wang, Guoqing2,4 | |
2017-02-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Drought episode identification and its severity characterization are crucial to evaluate and reduce the risk of drought disaster. The Standardized Precipitation Evapotranspiration Index (SPEI) with two different potential evapotranspiration formulations, i.e. the Thornthwaite and Penman-Monteith equations, (denoted as SPEI-Th and SPEI-Pm, respectively) are two popular drought indices used today. These two SPEI versions have the limitations of overestimation of drought (as a response to global warming) and high data requirements, respectively. A new SPEI variant was developed with precipitation and pan evaporation (E-pan) as its inputs (denoted as SPEI-Pe), which overcomes the shortcomings of SPEI-Pm and SPEI-Th. Climatic data at ground stations in the Yunnan Province (YP) of China were collected to validate this new SPEI variant with SPEI-Pm as the standard measure. Month-by-month comparison of SPEIs suggested that SPEI-Pe had a better agreement with the SPEI-Pm standard than SPEI-Th, with the criterion measures of mean absolute error and refined index of agreement (d(r)). The sensitivity analysis showed that two energy variables, net and global radiation are the most influential factors for evapotranspiration, and for SPEI-Pm and differences between SPEI-Pm and other two variants too. The validity of SPEI-Pe was also tested against the historical drought records in YP. Results demonstrated that SPEI-Pe generally agreed with historical drought events at different durations with only several exceptions, and thus it had a comparable performance to identify drought episodes with the other two SPEI variants in YP. The results suggest that SPEI-Pe has a better agreement with SPEI-Pm than SPEI-Th, and that it provides a good replacement for the standard measure when underlying climatic data (especially the energy variables) are not available. |
英文关键词 | drought Standardized Precipitation Evaporation Index Standardized Precipitation Evapotranspiration Index Yunnan Province |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393415100018 |
WOS关键词 | CHINA ; EVAPOTRANSPIRATION ; CLIMATE ; TREND |
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/37027 |
专题 | 气候变化 |
作者单位 | 1.Hohai Univ, Coll Hydrol & Water Resources, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Hydraul Res Inst, Hydrol & Water Resources Dept, Nanjing, Jiangsu, Peoples R China; 3.China Meteorol Adm, Inst Arid Meteorol, Lanzhou, Peoples R China; 4.Minist Water Resources, Res Ctr Climate Change, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Binquan,Liang, Zhongmin,Zhang, Jianyun,et al. A revised drought index based on precipitation and pan evaporation[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37(2). |
APA | Li, Binquan,Liang, Zhongmin,Zhang, Jianyun,&Wang, Guoqing.(2017).A revised drought index based on precipitation and pan evaporation.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37(2). |
MLA | Li, Binquan,et al."A revised drought index based on precipitation and pan evaporation".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37.2(2017). |
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