Yang Yu^1,2, Andrea Burke¹, James William Buchanan Rae¹, Chen Xu¹, Martin Frank², Ed Hathorne², Dirk Nuernberg², Michael Sarnthein³, Samuel Jaccard⁴ and Lester Lembke-Jene⁵, (1)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (3)University of Kiel, Institut für Geowissenschaften, Kiel, Germany, (4)University of Lausanne, Institute of Earth Sciences, Lausanne, Switzerland, (5)Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany