Asmita Banerjee¹, Edward J Brook², Christo Buizert³, Tao Sun⁴, Jacob Morgan⁵, Jeffrey P Severinghaus⁵, Ross Beaudette⁶, Etienne Legrain⁷, John A Higgins⁸, Sarah Shackleton⁹ and Julia Marks Peterson², (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Oregon State University, Corvallis, United States, (3)Oregon State University, Corvallis, OR, United States, (4)Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States, (5)Scripps Institution of Oceanography, La Jolla, United States, (6)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (7)Université Libre de Bruxelles, Brussel, Belgium, (8)Princeton University, Princeton, United States, (9)Woods Hole Oceanographic Institution, Woods Hole, United States