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El Niño-Southern Oscillation-like variability during glacial terminations and interlatitudinal teleconnections
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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.
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PENA GONZÁLEZ, Leopoldo david, CACHO LASCORZ, Isabel, FERRETTI, P., HALL, M. a.. El Niño-Southern Oscillation-like variability during glacial terminations and interlatitudinal teleconnections. _Paleoceanography_. 2008. Vol. 23, núm. 3, pàgs. 1-8. [consulta: 30 de gener de 2026]. ISSN: 0883-8305. [Disponible a: https://hdl.handle.net/2445/98757]