DOI: 10.1175/JCLI-D-15-0137.1
Scopus记录号: 2-s2.0-84947703596
论文题名: Propagation of strong rainfall events from Southeastern south America to the central Andes
作者: Boers N. ; Barbosa H.M.J. ; Bookhagen B. ; Marengo J.A. ; Marwan N. ; Kurths J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 19 起始页码: 7641
结束页码: 7658
语种: 英语
Scopus关键词: Mechanical waves
; Moisture
; Precipitation (chemical)
; Rain
; Storms
; Tropics
; Cold air
; Convective storms
; Extreme events
; Meso-scale systems
; Subtropical cyclones
; Precipitation (meteorology)
; cold air
; extreme event
; mesoscale meteorology
; monsoon
; precipitation (climatology)
; rainfall
; storm
; tropical cyclone
; Andes
; South America
英文摘要: Based on high-spatiotemporal-resolution data, the authors perform a climatological study of strong rainfall events propagating from southeastern South America to the eastern slopes of the central Andes during the monsoon season. These events account for up to 70% of total seasonal rainfall in these areas. They are of societal relevance because of associated natural hazards in the form of floods and landslides, and they form an intriguing climatic phenomenon, because they propagate against the direction of the low-level moisture flow from the tropics. The responsible synoptic mechanism is analyzed using suitable composites of the relevant atmospheric variables with high temporal resolution. The results suggest that the low-level inflow from the tropics, while important for maintaining sufficient moisture in the area of rainfall, does not initiate the formation of rainfall clusters. Instead, alternating low and high pressure anomalies in midlatitudes, which are associated with an eastward-moving Rossby wave train, in combination with the northwestern Argentinean low, create favorable pressure and wind conditions for frontogenesis and subsequent precipitation events propagating from southeastern South America toward the Bolivian Andes. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50486
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Potsdam Institute for Climate Impact Research, Potsdam, Brandenburg, Germany; Department of Physics, Humboldt University Berlin, Berlin, Germany; Institute of Physics, University of Saõ Paulo, Saõ Paulo, Brazil; Institute of Earth and Environmental Science, University of Potsdam, Potsdam, Germany; Center for Monitoring and Early Warning of Natural Disasters (CEMADEN), Cachoeira Paulista, Saõ Paulo, Brazil; Department of Control Theory, Nizhny Novgorod State University, Nizhny Novgorod, Russian Federation
Recommended Citation:
Boers N.,Barbosa H.M.J.,Bookhagen B.,et al. Propagation of strong rainfall events from Southeastern south America to the central Andes[J]. Journal of Climate,2015-01-01,28(19)