DOI: 10.1002/joc.5225
论文题名: Frequency, duration and severity of drought in the Semiarid Northeast Brazil region
作者: Brito S.S.B. ; Cunha A.P.M.A. ; Cunningham C.C. ; Alvalá R.C. ; Marengo J.A. ; Carvalho M.A.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 2 起始页码: 517
结束页码: 529
语种: 英语
英文关键词: agricultural drought
; climate extreme
; drought
; drought impact
; remote sensing
; semiarid
; SPI
; VHI
Scopus关键词: Agriculture
; Arid regions
; Disasters
; Losses
; Remote sensing
; Agricultural drought
; Climate extremes
; Drought characteristics
; Drought intensities
; Quantitative assessments
; semiarid
; Standardized precipitation index
; Vegetation health indices
; Drought
; drought
; extreme event
; frequency analysis
; hydrometeorology
; precipitation (climatology)
; remote sensing
; semiarid region
; vegetation index
; Brazil
英文摘要: Drought is the natural disaster that impacts the greatest number of people and produces the most significant economic losses. This work presents a quantitative assessment of drought events occurred in the Semiarid region of Northeast Brazil during 1981–2016. The purpose of this study is to provide an overview of drought intensity for the last 36 years, analysing their severity, frequency and duration, considering hydro-meteorological and agricultural aspects. To evaluate these two aspects, the 12-month standardized precipitation index and the vegetation health index were considered to investigate drought characteristics. The definition of drought event for both these indices was performed regarding start and end month. In this context, drought duration is considered equal to the number of months of event, drought frequency is the number of events per time period and the drought severity is the absolute value of integral area below zero. Results show that the most severe and prolonged drought occurred in 2011–2016. In a clear contrast to previous droughts in past decades, during these last 5-years period drought were more frequent, severe and affected a larger area with significant impacts for population, as well as economical activities. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117089
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: National Center for Monitoring and Early Warning of Natural Disasters, São José dos Campos, SP, Brazil
Recommended Citation:
Brito S.S.B.,Cunha A.P.M.A.,Cunningham C.C.,et al. Frequency, duration and severity of drought in the Semiarid Northeast Brazil region[J]. International Journal of Climatology,2018-01-01,38(2)