@Article{KayanoAndrSouz:2020:PaAtMu,
author = "Kayano, Mary Toshie and Andreoli, Rita Val{\'e}ria and Souza,
Rodrigo A. F. de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade do Estado do Amazonas (UEA)} and {Universidade do
Estado do Amazonas (UEA)}",
title = "Pacific and Atlantic multidecadal variability relations to the El
Niņo events and their effects on the South American rainfall",
journal = "International Journal of Climatology",
year = "2020",
volume = "40",
number = "4",
pages = "2183--2200",
month = "Mar.",
keywords = "Atlantic multidecadal oscillation, climate variability,
climatology, El Niņo, Pacific decadal oscillation.",
abstract = "This paper examines the oceanic mean states associated with the
Pacific decadal oscillation (PDO) and the Atlantic multidecadal
oscillation (AMO) and their relations to the El Niņo (EN). The
mean states refer to the simultaneous occurrences of warm (W) and
cold (C) phases of these oscillations: WAMO/CPDO, CAMO/ WPDO and
CAMO/CPDO. In general, the sea surface temperature (SST) anomaly
patterns of the mean states show a combination of the PDO and AMO
related anomaly patterns in the Pacific Ocean, and the strongest
AMO-related anomaly signals in the Atlantic Ocean with almost
antisymmetric SST anomaly patterns in the northern and southern
extratropical sectors of this Ocean. One of the most important
results of this paper concerns the contrasting features between
the CAMO/ WPDO and the WAMO/CPDO mean states, which are noticeable
for the SST, zonal circulation cell and precipitation during the
austral autumn. Besides the opposite inter-basin equatorial
Atlantic/eastern equatorial Pacific cells, the CAMO/ WPDO and
WAMO/CPDO mean states also feature, respectively, a weakened and
strengthened Walker cell in the tropical Pacific during the
austral autumn. The results here indicate that the inter-basin
eastwest cell between the equatorial Atlantic and eastern Pacific
contributes to strengthen (weaken) the Walker cell during the
austral autumn of the WAMO/CPDO (CAMO/WPDO) mean state. We also
found that the mean states alter the EN features. The EN-related
largest positive SST anomalies occur in the central tropical
Pacific during the WAMO/CPDO, and in the eastern tropical Pacific
during the CAMO/WPDO. The Atlantic and Pacific oceanic mean states
play an important role in modulating the EN features and their
effects on the South American rainfall. The results presented in
this paper might be relevant for climate monitoring and modelling
studies.",
doi = "10.1002/joc.6326",
url = "http://dx.doi.org/10.1002/joc.6326",
issn = "0899-8418",
label = "self-archiving-INPE-MCTIC-GOV-BR",
language = "en",
targetfile = "kayano_pacific.pdf",
urlaccessdate = "21 maio 2024"
}