@InProceedings{WeykampAmbr:2006:RoLoJe,
author = "Weykamp, Fabiana Vict{\'o}ria and Ambrizzi, T{\'e}rcio",
affiliation = "{Universidade de S{\~a}o Paulo}",
title = "The Role of the Low-Level Jet East of the Andes in Extreme
Rainfall events over Southern South America",
booktitle = "Proceedings...",
year = "2006",
editor = "Vera, Carolina and Nobre, Carlos",
pages = "1231--1234",
organization = "International Conference on Southern Hemisphere Meteorology and
Oceanography, 8. (ICSHMO).",
publisher = "American Meteorological Society (AMS)",
address = "45 Beacon Hill Road, Boston, MA, USA",
keywords = "Extreme Precipitation Events, Low-Level Jet.",
abstract = "Heavy daily precipitation events are of particular interest
because of their immediate and potential dramatic impacts.
Although there are many works in the literature about the
occurrence of extreme precipitation events in the southern South
America, its relationship with the Low-Level Jet East of the Andes
(SALLJ) is less studied. The aim of this study is to investigate
the relationship of the daily extreme precipitation events with
the position, intensity and duration of the SALLJ. Hereby, it
concentrates on the components of the circulation, convection and
moisture transport of the Amazon region towards the south of the
continent, focusing especially on the La Plata basin region.
Precipitation data from approximately 1500 surface stations and
the reanalysis gridded data of the NCEP-NCAR for the period
November to March, from 1979 to 1998, are used in this study. An
extreme event is defined here when daily rainfall exceed the 95th
percentile. In order to identify the SALLJ events the Bonner
criterion 1 was applied in site 20°S-60°W. The related dynamic
aspects to the patterns observed in the atmospheric circulation
since the surface up to high tropospheric levels for the
simultaneous and unbalanced days of occurrence of extreme
precipitation events and of the SALLJ had been analyzed through
composites of diverse anomaly fields. It was found that the
extreme events and the SALLJ are well correlated with each other
as well as with high and low frequency systems from
midlatitudes..",
conference-location = "Foz do Igua{\c{c}}u",
conference-year = "24-28 Apr. 2006",
language = "en",
organisation = "American Meteorological Society (AMS)",
ibi = "cptec.inpe.br/adm_conf/2005/10.31.16.11",
url = "http://urlib.net/ibi/cptec.inpe.br/adm_conf/2005/10.31.16.11",
targetfile = "1231-1234.pdf",
type = "Monsoon systems and continental rainfall",
urlaccessdate = "03 maio 2024"
}