Paleoceanography

Evidence for stronger El Niño-Southern Oscillation (ENSO) Events in a Mid-Holocene massive coral

Authors

  • Thierry Corrège,

  • Thierry Delcroix,

  • Jacques Récy,

  • Warren Beck,

  • Guy Cabioch,

  • Florence Le Cornec


Abstract

We present a 47-year-long record of sea surface temperature (SST) derived from Sr/Ca and U/Ca analysis of a massive Porites coral which grew at ∼ 4150 calendar years before present (B.P.) in Vanuatu (southwest tropical Pacific Ocean). Mean SST is similar in both the modern instrumental record and paleorecord, and both exhibit El Niño-Southern Oscillation (ENSO) frequency SST oscillations. However, several strong decadal-frequency cooling events and a marked modulation of the seasonal SST cycle, with power at both ENSO and decadal frequencies, are observed in the paleorecord, which are unprecedented in the modern record.

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