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Title: El Niño-Southern Oscillation-like variability during glacial terminations and interlatitudinal teleconnections
Author: Pena González, Leopoldo David
Cacho Lascorz, Isabel
Ferretti, P.
Hall, M.A.
Keywords: Canvis climàtics
Corrents marins
Corrent del Niño
Interacció oceà-atmosfera
Climatic changes
Ocean currents
El Niño Current
Ocean-atmosphere interaction
Issue Date: 2008
Publisher: American Geophysical Union
Abstract: Interannual-decadal variability in the equatorial Pacific El Niño-Southern Oscillation (ENSO) induces climate changes at global scale, but its potential influence during past global climate change is not yet well constrained. New high-resolution eastern equatorial Pacific proxy records of thermocline conditions present new evidence of strong orbital control in ENSO-like variability over the last 275,000 years. Recurrent intervals of saltier thermocline waters are associated with the dominance of La Niña-like conditions during glacial terminations, coinciding with periods of low precession and high obliquity. The parallel dominance of δ 13C-depleted waters supports the advection of Antarctic origin waters toward the tropical thermocline. This "oceanic tunneling" is proposed to have reinforced orbitally induced changes in ENSO-like variability, composing a complex high- and low-latitude feedback during glacial terminations.
Note: Reproducció del document publicat a:
It is part of: Paleoceanography, 2008, vol. 23, num. 3, p. 1-8
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ISSN: 0883-8305
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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