1. Department of Earth System Science, University of California, Irvine, CA, USA.
2. Climate and Global Dynamics Division, Natural Center for Atmospheric Research, Boulder, CO, USA.
3. Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA.
4. Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, USA.
5. Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, TN, USA.