@Article{KayanoAndrGarcSouz:2018:HoTwNo,
author = "Kayano, Mary Toshie and Andreoli, Rita Val{\'e}ria and Garcia,
S{\^a}mia Regina and Souza, Rodrigo Augusto Ferreira de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade do Estado do Amazonas (UEAM)} and {Universidade
Federal de S{\~a}o Paulo (UNIFESP)} and {Universidade do Estado
do Amazonas (UEAM)}",
title = "How the two nodes of the tropical Atlantic sea surface temperature
dipole relate the climate of the surrounding regions during
austral autumn",
journal = "International Journal of Climatology",
year = "2018",
volume = "38",
number = "10",
pages = "3927--3941",
month = "Aug.",
keywords = "climatology, climate variability, cross-equatorial mode,
precipitation, South America, tropical Atlantic.",
abstract = "The relations of both nodes of the tropical Atlantic (TA)
cross-equatorial sea surface temperature (SST) gradient (GRAD)
mode to the climate of northeast Brazil (NEB) during the 1901-2012
period are examined separately. The GRAD mode consists of a SST
anomalous pattern anti-symmetric about the equator with centres in
the region of the northeasterly and southwesterly trade winds. The
positive GRAD (PGRAD) (negative GRAD [NGRAD]) modes defined by
their northern or southern nodes are considered separately, as
well as, if they are preceded or not by an El Nino (EN) (a La
Nina, LN). The PGRAD mode defined by the northern (southern) node
and preceded by an EN is indicated by PGRAD_TNA_EN (PGRAD_TSA_EN),
and that not preceded by an EN is indicated by PGRAD_TNA
(PGRAD_TSA). The corresponding NGRAD modes are indicated by
NGRAD_TNA_LN, NGRAD_TSA_LN, NGRAD_TNA and NGRAD_TSA. Our analysis
is limited to the NEB rainy season (March-May), when the GRAD mode
is more pronounced and the NEB rainfall is more closely related to
the TA SST variations. In general, the South Atlantic subtropical
high is crucial in defining the cross-equatorial flow, responsible
for the anomalous meridional positioning of the Atlantic
inter-tropical convergence zone. When a positive (negative)
dipole-like SST anomaly pattern is established in the TA, the
negative (positive) rainfall anomalies occupy most of NEB. This is
the case of the PGRAD_TSA_EN, PGRAD_TNA, NGRAD_TSA_LN and
NGRAD_TNA_LN. Most of the GRAD modes defined by TNA are also
related to the El Nino-Southern Oscillation (ENSO), in such a way
that an EN (a LN) precedes a PGRAD (NGRAD) event, and most of the
GRAD modes defined by TSA do not depend on the ENSO. Also, the
PGRAD events are well distributed during both Atlantic
multidecadal oscillation phases and the NGRAD events occur
preferably during its cold phase.",
doi = "10.1002/joc.5545",
url = "http://dx.doi.org/10.1002/joc.5545",
issn = "0899-8418",
language = "en",
targetfile = "kayano_how.pdf",
urlaccessdate = "18 abr. 2024"
}