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GEOPHYSICAL RESEARCH LETTERS,
VOL. 30, NO. 11,
1570,
doi:10.1029/2003GL017345,
2003
Interannual-to-interdecadal sea surface temperature variability along the western coast of South America
A. Montecinos
Programa Regional de Oceanografía Física y Clima (PROFC), and Departamento de Oceanografía, Universidad de Concepción, Chile
S. Purca
Departamento de Oceanografía, Universidad de Concepción, Chile
O. Pizarro
DEFAO/PROFC/COPAS, Universidad de Concepción, Chile
Abstract
Interannual and interdecadal regional-scale sea surface temperature (SST) variability along Peru and Chile are described based
on 9 coastal stations and global SST in the period 1951–1999. ENSO-related interannual variability dominates the low-passed
time series along the coast, with maximum amplitudes in the tropics decreasing southward. At tropical latitudes interdecadal
variance is about one-third of the interannual variance while they are of similar amplitude in the midlatitudes (36°S). The
correlation between the low frequency coastal modes and the Pacific and Atlantic SST suggests that the coastal SST variability
comprises two main large-scale climate processes: the ENSO cycle at interannual timescale, and a basin-wide, perhaps even
a global-scale, interdecadal oscillation.
Received 17
March
2003;
accepted 1
May
2003;
published 7
June
2003.
Index Terms: 4215 Oceanography: General: Climate and interannual variability (3309); 4223 Oceanography: General: Descriptive and regional oceanography; 4522 Oceanography: Physical: El Nino.
Read Full Article (file size: 354933 bytes) Cited by
Citation: Montecinos, A., S. Purca, and O. Pizarro
(2003),
Interannual-to-interdecadal sea surface temperature variability along the western coast of South America,
Geophys. Res. Lett.,
30(11),
1570,
doi:10.1029/2003GL017345.
Copyright 2003 by the American Geophysical Union.
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