DOI: 10.1002/2014GL061829
论文题名: The South American rainfall dipole: A complex network analysis of extreme events
作者: Boers N. ; Rheinwalt A. ; Bookhagen B. ; Barbosa H.M.J. ; Marwan N. ; Marengo J. ; Kurths J.
刊名: Geophysical Research Letters
ISSN: 0094-9706
EISSN: 1944-9437
出版年: 2014
卷: 41, 期: 20 起始页码: 7397
结束页码: 7405
语种: 英语
英文关键词: complex networks
; event synchronization
; extreme rainfall
; Rossby waves
; South American monsoon system
Scopus关键词: Atmospheric thermodynamics
; Complex networks
; Mechanical waves
; Synchronization
; Tropics
; Event synchronization
; Extreme rainfall
; Large-scale circulation patterns
; Monsoon system
; Nonlinear synchronization
; Rainfall variability
; Rossby wave
; Southeastern South America
; Rain
; extreme event
; monsoon
; nonlinearity
; precipitation assessment
; rainfall
; Rossby wave
; subtropical region
; Andes
; Brazil
英文摘要: Intraseasonal rainfall variability of the South American monsoon system is characterized by a pronounced dipole between southeastern South America and southeastern Brazil. Here we analyze the dynamical properties of extreme rainfall events associated with this dipole by combining a nonlinear synchronization measure with complex networks. We make the following main observations: (i) Our approach reveals the dominant synchronization pathways of extreme events for the two dipole phases, (ii) while extreme rainfall synchronization in the tropics is directly driven by the trade winds and their deflection by the Andes mountains, extreme rainfall propagation in the subtropics is mainly dictated by frontal systems, and (iii) the well-known rainfall dipole is, in fact, only the most prominent mode of an oscillatory pattern that extends over the entire continent. This provides further evidence that the influence of Rossby waves, which cause frontal systems over South America and impact large-scale circulation patterns, extends beyond the equator. Key PointsComplex networks substitute EOFs for spatial analysis of extreme rainfallReveal drivers of extreme rainfall related to South American rainfall dipoleExtreme events controlled by Rossby oscillation extending over the entire continent ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911371791&doi=10.1002%2f2014GL061829&partnerID=40&md5=f2d9e2813584ca8ff6fcc0311cf1b351
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6970
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, Humboldt University, Berlin, Germany
Recommended Citation:
Boers N.,Rheinwalt A.,Bookhagen B.,et al. The South American rainfall dipole: A complex network analysis of extreme events[J]. Geophysical Research Letters,2014-01-01,41(20).