Ann Holbourn¹, Wolfgang Kuhnt¹, Julia Lübbers¹, Karlos Guilherme Diemer Kochhann², Kenji Marc Raymond Matsuzaki³ and Nils Andersen⁴, (1)University of Kiel, Kiel, Germany, (2)Unisinos University, São Leopoldo, Brazil, (3)Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan, (4)University of Kiel, Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Kiel, Germany