@Article{NascimentoHerdSouz:2016:InLoJe,
author = "Nascimento, Mar{\'{\i}}lia Guedes do and Herdies, Dirceu Luis
and Souza, Diego Oliveira de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Centro Nacional de
Monitoramento e Alerta de Desastres Naturais (CEMADEN)}",
title = "The south American water balance: The influence of low-level
jets",
journal = "Journal of Climate",
year = "2016",
volume = "29",
number = "4",
pages = "1429--1449",
abstract = "To study the climatology of the water balance over South America
and analyze the influence of low-level jets (LLJs), a climate
study of the water balance and its main components was performed,
specifically in the Amazon and La Plata basin (LPB) region, from
1979 to 2008. The results showed that on average for the analysis
period, the Amazon basin and LPB performed as a sink of moisture
(ET <P) and as a moisture convergence for the regions, which
accounted for approximately 62% and 43% of the precipitation,
respectively. During the study period, 884 days with an occurrence
of LLJs were observed, occurring most frequently during the winter
and around 0000 and 0600 UTC. When considering the water balance
for the days with LLJs, it was observed that the Amazon acts as a
source of moisture, especially in the dry season, and that the LPB
behaves as a sink during all months. The influence of the LLJ as a
modulator for precipitation on the LPB is clear, as the
precipitation is 32% higher during the LLJ events compared with
days without LLJs. This main pattern shows that the moisture
convergence trough of the LLJs is crucial for the water balance on
the LPB, whereas evapotranspiration is a more important variable
of the water balance on the Amazon basin with or without the
LLJs.",
doi = "10.1175/JCLI-D-15-0065.1",
url = "http://dx.doi.org/10.1175/JCLI-D-15-0065.1",
issn = "0894-8755",
language = "en",
urlaccessdate = "28 mar. 2024"
}