Stable carbon and oxygen isotope records of planktonic foraminifera of core MD05-2925, South margin of western Pacific Warm Pool during the last 550 ka

[[abstract]]Stable isotope data from Solomon Sea core MD05-2925 (9°20.61'S, 151°27.61'E, 28.43m in length, 1642m water depth) are presented from planktonic foraminifera Globigerinoides ruber, Globigerina sacculifer and Pulleniatina obliquiloculata (top 10m) . The age model for core MD05-2925 is based on correlation of the G. sacculifer oxygen isotope record to the Low Latitude Stake chronology and five radiocarbon dating. In order to reconstruct the hydrology during the last two glacial terminations in the south margin of the Western Equatorial Pacific Warm Pool, we use multiple species approach of planktonic foraminifera as the proxy of water column structure. We compare the oxygon and carbon isotope records of the surface-dwelling foraminifers G. ruber and G. sacculifer and thermocline dwelling P. obliquiloculata with the cores in the eastern equatorial Pacific upwelling region, central Western Equatorial Pacific Warm Pool, and Antarctica. We demonstrate that during the last two glacial terminations, there are obvious ?13C minimum events related to the South Ocean warming and CO2 concentration increment. With the support like the oxygen isotope records , we demonstrate that thermocline in the south region of the western Pacific Warm Pool was deepen and was warmer during the last two terminations.