Peter Jacobs¹, Natalie Burls², Harry J Dowsett³, Alexandra Jahn⁴, Heather L Ford⁵, Bette L Otto-Bliesner⁶ and Kim de Mutsert¹, (1)George Mason University, Environmental Science and Policy, Fairfax, VA, United States, (2)Yale University, New Haven, CT, United States, (3)U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, VA, United States, (4)National Center for Atmospheric Research, Boulder, CO, United States, (5)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (6)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States