DOI: 10.1007/s10584-014-1217-x
Scopus记录号: 2-s2.0-85027933676
论文题名: Satellite-based rainfall data reveal a recent drying trend in central equatorial Africa
作者: Diem J.E. ; Ryan S.J. ; Hartter J. ; Palace M.W.
刊名: Climatic Change
ISSN: 0165-0009
EISSN: 1573-1480
出版年: 2014
卷: 126, 期: 2018-01-02 起始页码: 263
结束页码: 272
语种: 英语
Scopus关键词: Atmospheric temperature
; Biodiversity
; Conservation
; Food supply
; Oceanography
; Surface waters
; Atlantic multidecadal oscillations
; Carbonaceous aerosol
; Critically endangered
; North Atlantic Ocean
; Rainfall climatologies
; Sea surface temperatures
; Seasonal rainfall
; Subsistence agriculture
; Rain
英文摘要: West-central Uganda, a biodiversity hotspot on the eastern edge of central equatorial Africa (CEA), is a region coping with balancing food security needs of a rapidly growing human population dependent on subsistence agriculture with the conservation of critically endangered species. Documenting and understanding rainfall trends is thus of critical importance in west-central Uganda, but sparse information exists on rainfall trends in CEA during the past several decades. The recently created African Rainfall Climatology version 2 (ARC2) dataset has been shown to perform satisfactorily at identifying rainfall days and estimating seasonal rainfall totals in west-central Uganda. Therefore, we use ARC2 data to assess rainfall trends in west-central Uganda and other parts of equatorial Africa from 1983–2012. The core variables examined were three-month rainfall variables for west-central Uganda, and annual rainfall variables and seasonal rainfall totals for a transect that extended from northwestern Democratic Republic of the Congo to southern Somalia. Significant decreases in rainfall in west-central Uganda occurred for multiple three-month periods centered on boreal summer, and rainfall associated with the two growing seasons decreased by 20 % from 1983–2012. The drying trend in west-central Uganda extended westward into the Congo rainforest. Rainfall in CEA was significantly correlated with the Atlantic Multidecadal Oscillation (AMO) at the annual scale and during boreal summer and autumn. Two other possible causes of the decreasing rainfall in CEA besides North Atlantic Ocean sea-surface temperatures (e.g., AMO), are the warming of the Indian Ocean and increasing concentrations of carbonaceous aerosols over tropical Africa from biomass burning. © 2014, Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/84718
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Geosciences, Georgia State University, P. O. Box 4105, Atlanta, GA, United States; Department of Geography, University of Florida, Gainesville, FL, United States; Emerging Pathogens Institute, University of Florida, Gainesville, FL, United States; Environmental Studies Program, University of Colorado, UCB 397, Boulder, CO, United States; Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, United States
Recommended Citation:
Diem J.E.,Ryan S.J.,Hartter J.,et al. Satellite-based rainfall data reveal a recent drying trend in central equatorial Africa[J]. Climatic Change,2014-01-01,126(2018-01-02)