DOI: 10.1002/joc.6026
Scopus记录号: 2-s2.0-85062781529
论文题名: Spatial and temporal patterns of drought in Oklahoma (1901–2014)
作者: Tian L. ; Quiring S.M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
语种: 英语
英文关键词: drought
; hydroclimate
; precipitation
; spatiotemporal
; SPEI
; trend
; variability
Scopus关键词: Evapotranspiration
; Precipitation (chemical)
; Principal component analysis
; hydroclimate
; spatiotemporal
; SPEI
; trend
; variability
; Drought
英文摘要: This study uses the Standardized Precipitation Evapotranspiration Index (SPEI) at a 6-month timescale to document the spatial and temporal patterns of drought in Oklahoma from 1901 to 2014. A principal component analysis (PCA) with a VARIMAX rotation was used to divide Oklahoma into four spatially contiguous regions with similar drought patterns that are located in northwestern, northeastern, southwestern and southeastern regions of the state. Droughts tend to occur more frequently in northwestern Oklahoma, but all four regions show that droughts in Oklahoma have substantial variability at decadal timescales. A Mann–Kendall trend test demonstrates that there has been a statistically significant increase in the SPEI in Oklahoma since 1901. This indicates that conditions are generally getting wetter in Oklahoma. However, there is substantial variability in moisture conditions that is evident at shorter timescales. Prolonged periods of drier than normal conditions occurred in the 1910s, 1930s, 1950s, 1970s and 1980s, while conditions from the 1980s to the 2000s have been wetter than normal. Recently, the SPEI has decreased, which suggests that Oklahoma may be at the beginning of another dry cycle. In addition, while most droughts during the study period were caused by decreases in precipitation, recent droughts, such as the severe drought in 2011, were caused by both decreases in precipitation and increases in potential evapotranspiration. This may be indicative of future drought conditions in Oklahoma. © 2019 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116596
Appears in Collections: 全球变化的国际研究计划
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作者单位: Climate Science Laboratory, Department of Geography, Texas A&M University, College Station, TX, United States; Atmospheric Sciences Program, Department of Geography, The Ohio State University, Columbus, OH, United States
Recommended Citation:
Tian L.,Quiring S.M.. Spatial and temporal patterns of drought in Oklahoma (1901–2014)[J]. International Journal of Climatology,2019-01-01