11:45 AM - 12:00 PM
*Stephen Obrochta1, Bryan C Lockheed2, Raimund Muscheler3, Yusuke Yokoyama4, Yosuke Miyairi4 (1.Akita University, 2.Laboratoire des Sciences du Climat et de l'Environnement, CNRS, 3.Lund University, 4.University of Tokyo Atmosphere and Ocean Research Institute)