@Article{AndreoliKaya:2004:MuVaSe,
author = "Andreoli, Rita V. and Kayano, Mary Toshie",
affiliation = "{CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil}",
title = "Multi-scale variability of the sea surface temperature in the
Tropical Atlantic",
journal = "Revista Brasileira de Geof{\'{\i}}sica",
year = "2004",
volume = "109",
number = "C 5",
pages = "Art. No. C05009",
month = "May.",
keywords = "wavelet, sea surface temperature, Tropical Atlantic.",
abstract = "[1] Tropical Atlantic ( TA) sea surface temperature (SST)
variability is studied using the Continuous Wavelet Transform
(CWT) of the SST indices in the Tropical North Atlantic (TNA),
Tropical South Atlantic (TSA), and Equatorial Atlantic (EQA). CWT
of the difference index (TNSD) between the TNA and TSA indices and
the cross-wavelet spectrum for the TNA and TSA indices are also
examined. The analyses focus the short-interannual, interannual,
and decadal scales. The Global Wavelet Power of the TNA, TSA, and
EQA indices confirm previous findings on the dominant scales of
the SST variability in different TA sectors. The decadal peaks are
dominant for the TNA and TSA indices while the interannual peaks
are significant only for the EQA index. The scale averaged
DeltaPhi series for all scales feature a number of abrupt
reversals of +/- 180degrees which depends on the scale, with
larger number for smaller scales. The DeltaPhi during the period
between two subsequent abrupt reversals remains close to
+/-180degrees or varies within sub-intervals of the -180degrees to
+180degrees range, thus the dipole-like, cross-equatorial SST
anomaly gradient, monopole, and equatorial patterns are
established as evolving modes. For all scales, the periods of
abrupt DeltaPhi reversals of +/-180degrees occur within the
periods with change in the meridional propagation directions of
the SST anomalies or with reduced SST anomalies. This result
strongly suggests that the establishment of the SST anomaly
patterns in the TA depends crucially on the meridional propagation
of the SST anomalies. This is a new aspect not discussed before.",
copyholder = "SID/SCD",
issn = "0102-261X",
language = "en",
targetfile = "Andreoli_Multi-scale.pdf",
urlaccessdate = "28 mar. 2024"
}