@Article{FigliuoloAnKaCoReMo:2020:RoAtMu,
author = "Figliuolo, Guilherme C. and Andreoli, Rita Val{\'e}ria and
Kayano, Mary Toshie and Costa, Jean Antunes Cust{\'o}dio da and
Rego, Willy H. T. and Moraes, Djanir Sales de",
affiliation = "{Instituto Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and
{Universidade do Estado do Amazonas (UEA)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas da Amaz{\^o}nia (INPA)} and {Universidade do Estado do
Amazonas (UEA)} and {Universidade do Estado do Amazonas (UEA)}",
title = "The role of the Atlantic Multidecadal Oscillation precondition in
the teleconnection of different El Niño-Southern Oscillation types
and impacts on the 15N–15S South American sector precipitation",
journal = "International Journal of Climatology",
year = "2020",
volume = "40",
number = "4",
pages = "1943--1964",
keywords = "Atlantic Multidecadal Oscillation, ENSO teleconnection, South
America rainfall, tropical Atlantic.",
abstract = "The Eastern Pacific (EP) and Central Pacific (CP) El Niño-Southern
Oscillation (ENSO) types and their impacts on the tropical North
Atlantic (TNA) SST variability and 15N15S South American
precipitation during the warm and cold phases of the Atlantic
Multidecadal Oscillation (WAMO and CAMO) were evaluated during the
19012012 period. The results show more frequent ENSO events during
the CAMO. The El Niño (EN) (La Niña [LN]) events, regardless of
type (EP or CP), during the WAMO (CAMO) were accompanied by a
warming (cooling) in the TNA after its mature phases. In these
cases, extratropical teleconnection patterns are established
through variations in the Pacific/North America (PNA)
teleconnection pattern and are accompanied by variations in the
Walker circulation. For the EN (LN) in the CAMO (WAMO), the
tropical teleconnections occur predominant, through the Walker
cell and the zonal inter-basin gradient, which is intensified due
to the SST gradient between the eastern equatorial Pacific
(nonneutral anomalies) and the equatorial Atlantic (neutral
anomalies). These circulation pattern changes affect the
precipitation patterns in the 15N15S South American sector during
DecemberJanuaryFebruary (D(0)JF(+1)) and March AprilMay (MAM(+1)).
The EP EN (EPEN) events are associated with the intensification of
the negative precipitation anomalies in northeastern Brazil (NEB)
during the WAMO and in the central part of the Amazon during the
CAMO. In the case of CP EN (CPEN) events, the greatest differences
between the AMO phases occur during MAM(+1), with reverse sign
anomalies over northwestern South America. In the case of LN
events, the largest differences occur in NEB, with reduced
rainfall in the WAMO, regardless of type EP or CP. The results
presented here highlight the role of low frequency oscillations in
defining the teleconnection patterns between tropical Pacific and
Atlantic Oceans, not discussed previously.",
doi = "10.1002/joc.6309",
url = "http://dx.doi.org/10.1002/joc.6309",
issn = "0899-8418",
language = "en",
targetfile = "figliuolo_role2020.pdf",
urlaccessdate = "27 abr. 2024"
}