Publikationsdatum:
2024-01-09
Beschreibung:
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 d13C-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.
Schlagwort(e):
202-1240; Age, 14C AMS; Age, comment; Age, dated; Age, dated standard deviation; Age model; COMPCORE; Composite Core; DEPTH, sediment/rock; Equatorial East Pacific; Joides Resolution; Laboratory code/label; Leg202; Ocean Drilling Program; ODP
Materialart:
Dataset
Format:
text/tab-separated-values, 109 data points
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