*Matthieu Civel^1,2、Xavier Crosta³、Giuseppe Cortese⁴、Elisabeth Michel⁵、Alain Mazaud⁵、Samuel Jaccard⁶、Lena Thöle⁶、Minoru Ikehara¹、Takuya Itaki² (1.Center for Advanced Marine Core Research, Kochi University, Japan、2.Geological Survey of Japan, AIST, Tsukuba, Japan、3.UMR 5805 CNRS EPOC, Université de Bordeaux, France、4.GNS Science, Lower Hutt, New Zealand、5.LSCE-IPSL, CEA-CNRS-UVSQ, 91198 Gif-sur-Yvette, France、6.Institute of Geological Sciences & Oeschger Centre for Climate Change Research, University of Bern, Switzerland)