*Bethany C. Behrens¹、Agathe Lise-Pronovost^2,3、Michael-Shawn Fletcher²、Yasuto Watanabe⁴、Takahiro AZE⁵、Yosuke Miyairi⁵、Yusuke Yokoyama^5,6,7,8,9 (1.Graduate School of International Resource Science, Akita University, Japan、2.School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Australia、3.The Australian Archaeomagnetism Laboratory, Paleoscience Labs, Department of Archaeology and History, La Trobe University, Melbourne Campus, Australia、4.Japan Meteorological Agency, Global Atmosphere and Ocean Research Department, Japan、5.Atmosphere and Ocean Research Institute, The University of Tokyo, Japan、6.Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo, Japan、7.Graduate Program on Environmental Sciences, The University of Tokyo, Japan、8.Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, Japan、9.Research School of Physics, The Australian National University, Canberra, Australia)