@Article{Cavalcanti:2012:ReCaSt,
author = "Cavalcanti, Iracema Fonseca Albuquerque",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Large scale and synoptic features associated with extreme
precipitation over South America: A review and case studies for
the first decade of the 21st century",
journal = "Atmospheric Research",
year = "2012",
volume = "118",
number = "15",
pages = "27--40",
month = "Nov.",
keywords = "extreme precipitation, South America, atmospheric features,
droughts, floods.",
abstract = "Flooding or droughts over South America affect the population and
several sectors of the economy such as agriculture, energy and
transport. Floods occur due to extreme precipitation from
mesoscale precipitating systems, which can often be embedded in
synoptic systems that are influenced by large scale conditions
that are in turn influenced by climate variability. Droughts are
associated with lack of or reduced influence of these synoptic
systems, and also affected by persistent large scale conditions.
El NiņoSouthern Oscillation episodes have been related to droughts
in Amazonia and northeastern Brazil and flooding in southeastern
South America. Other extreme cases have been associated with
Atlantic sea surface temperature (SST) anomalies. Extreme cases
also occur in association with tropicalextratropical interactions,
through atmospheric circulation anomalies in both tropics and
extratropics. In the present review, studies of precipitation
extremes in South America and some examples of extreme
precipitation in several regions of South America in the 21st
century are shown, and a discussion of the associated mechanisms
is included. The influences of tropical and extratropical large
scale climate variability such as the Pacific and Atlantic SST,
the Pacific South America pattern, the Southern Hemisphere annular
mode and features of the North Atlantic Oscillation on extremes
over South America are mentioned. Daily precipitation extremes
over South America are often related to convective development
within synoptic systems, such as frontal systems and the South
Atlantic Convergence Zone, in the Southeastern Brazil.
Intertropical Convergence Zone and easterly disturbances are the
main systems inwhich convective development can occur related to
precipitation extremes in Northeastern region. In La Plata basin,
extremes are associated with highly organized convective systems
originating in the lee of the Andes that propagate eastward.",
doi = "10.1016/j.atmosres.2012.06.012",
url = "http://dx.doi.org/10.1016/j.atmosres.2012.06.012",
issn = "0169-8095",
language = "en",
urlaccessdate = "15 jun. 2024"
}