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contributor authorBoers, Niklas
contributor authorBarbosa, Henrique M. J.
contributor authorBookhagen, Bodo
contributor authorMarengo, José A.
contributor authorMarwan, Norbert
contributor authorKurths, Jürgen
date accessioned2017-06-09T17:12:09Z
date available2017-06-09T17:12:09Z
date copyright2015/10/01
date issued2015
identifier issn0894-8755
identifier otherams-81021.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4223978
description abstractased 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.
publisherAmerican Meteorological Society
titlePropagation of Strong Rainfall Events from Southeastern South America to the Central Andes
typeJournal Paper
journal volume28
journal issue19
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-15-0137.1
journal fristpage7641
journal lastpage7658
treeJournal of Climate:;2015:;volume( 028 ):;issue: 019
contenttypeFulltext


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