ENSO and interdecadal climate variability over the last century documented by geochemical records of two coral cores from the South West Pacific

摘要

The south west Pacific is affected by climatic phenomena such as ENSO (ElNiño Southern Oscillation) or the PDO (Pacific Decadal Oscillation).Near-monthly resolution calibrations of Sr/Ca, U/Ca and style="font-family: 'Symbol, Times New Roman, Times'; font-size: 16px;">δ18Ocwere made on corals taken from New Caledonia and Wallis Island. Thesegeochemical variations could be linked to SST (sea surface temperature) andSSS (sea surface salinity) variations over the last two decades, itselvesdependent on ENSO occurrences. On the other hand, near-half-yearlyresolution over the last century smoothes seasonal and interannual climatesignals, but emphasizes low frequency climate variability.