Jeffrey Theodore Kiehl¹, Christine A Shields², Colin M. Zarzycki³, James C Zachos⁴, Mark A Snyder⁴ and Mathew Rothstein⁵, (1)UC Santa Cruz, Department of Earth & Planetary Sciences, Santa Cruz, CA, United States, (2)NCAR, Boulder, CO, United States, (3)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States, (4)Univ California Santa Cruz, Santa Cruz, CA, United States, (5)National Center for Atmospheric Research, Boulder, CO, United States