Decoupled Holocene variability in surface and thermocline water temperatures of the Indo-Pacific Warm Pool

International audience[1] The Holocene variability in sea surface and thermocline water temperatures (SST and TWT) in the Indo-Pacific Warm Pool (IPWP) has been reconstructed by planktonic foraminiferal Mg/Ca from sediments of the western tropical Philippine Sea. Afterward the Younger Dryas interval (YD), SST warmed gradually till $10 ka and remained approximately constant afterwards, but TWT rose more rapidly to a peak between $12 and $10 ka and then declined by $1.5°C through the Holocene. The trend of TWT closely followed the boreal summer insolation and could be correlated to tropical climate changes represented by southward movement of the Inter-tropical Convergence Zone (ITCZ) and related changes in East Asian monsoons