Yixuan Zheng, Carnegie Institution for Science Stanford, Department of Global Ecology, Stanford, United States, Steven J Davis, University of California Irvine, Earth System Science, Irvine, CA, United States, Geeta G Persad, Carnegie Institution for Science Stanford, Department of Global Ecology, Stanford, CA, United States and Ken Caldeira, Carnegie Institution for Science Stanford, Dept. of Global Ecology, Stanford, CA, United States