Publication Date:
2023-06-27
Description:
The early last glacial termination was characterized by intense North Atlantic cooling and weak overturning circulation. This interval between ~18,000 and 14,600 years ago, known as Heinrich Stadial 1, was accompanied by a disruption of global climate and has been suggested as a key factor for the termination. However, the response of interannual climate variability in the tropical Pacific (El Niño-Southern Oscillation) to Heinrich Stadial 1 is poorly understood. Here we use Sr/Ca in a fossil Tahiti coral to reconstruct tropical South Pacific sea surface temperature around 15,000 years ago at monthly resolution. Unlike today, interannual South Pacific sea surface temperature variability at typical El Niño-Southern Oscillation periods was pronounced at Tahiti. Our results indicate that the El Niño-Southern Oscillation was active during Heinrich Stadial 1, consistent with climate model simulations of enhanced El Niño-Southern Oscillation variability at that time. Furthermore, a greater El Niño-Southern Oscillation influence in the South Pacific during Heinrich Stadial 1 is suggested, resulting from a southward expansion or shift of El Niño-Southern Oscillation sea surface temperature anomalies.
Keywords:
310-M0024A; Calculated, see reference(s); DP Hunter; DRILL; Drilling/drill rig; Exp310; ICP-OES, Perkin-Elmer, Optima 3300R; Integrated Ocean Drilling Program / International Ocean Discovery Program; Internal coral chronology; IODP; Mass spectrometer Finnigan MAT 251; Porites sp., Strontium/Calcium ratio; Porites sp., δ18O; Sample code/label; TAH-02A-5F; Tahiti, offshore Tiarei; Tahiti Sea Level
Type:
Dataset
Format:
text/tab-separated-values, 1068 data points
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