DOI: 10.1002/joc.5475
论文题名: On the long-term changes of drought over China (1948–2012) from different methods of potential evapotranspiration estimations
作者: Wang G. ; Gong T. ; Lu J. ; Lou D. ; Hagan D.F.T. ; Chen T.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 7 起始页码: 2954
结束页码: 2966
语种: 英语
英文关键词: climate change
; comparison
; drought assessment
; method
; potential evapotranspiration
Scopus关键词: Drought
; Evapotranspiration
; Wetting
; Climatic regions
; Comparison
; Drought severity
; Long term change
; Method
; NorthWest China
; Potential evapotranspiration
; Self-calibrating Palmer drought severity indices
; Climate change
; climate change
; comparative study
; drought
; long-term change
; Penman-Monteith equation
; potential evapotranspiration
; China
英文摘要: Assessing the long-term drought changes is of large interest for understanding the impact of climate change on water resources. Here we have attempted to assess the long-term drought changes (1948–2012) over China using the self-calibrating Palmer drought severity index with Penman–Monteith (scPDSIPM) and Thornthwaite (scPDSITh) methods for potential evapotranspiration (PET) estimations, respectively, so as to understand the impact of different PET methods on drought assessment. Both scPDSIPM and scPDSITh appear to have drying trends in the humid and transitional climatic regions, which are particularly significant in the north China. Compared to scPDSIPM, the scPDSITh data have resulted in exaggerated drought severity in the north China since 1980s, and such exaggeration is particularly significant for extreme droughts in terms of the occurrences and the intensity. In the dry climatic regions of northwest China, both scPDSIPM and scPDSITh appear to exhibit adequate wetting trends; however, both data have shown drying trends of intensity when drought occurs, indicating there are more extreme dry conditions in the context of generally wetting background. Surprisingly, scPDSIPM is found to result in exaggerated droughts rather than scPDSITh in the northwest China. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116882
Appears in Collections: 气候减缓与适应
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作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing, China
Recommended Citation:
Wang G.,Gong T.,Lu J.,et al. On the long-term changes of drought over China (1948–2012) from different methods of potential evapotranspiration estimations[J]. International Journal of Climatology,2018-01-01,38(7)