2014-Present Professor, Dep’t. of Earth and Environment, Boston University 2014-Present Visiting Fellow, The Frederick S. Pardee Center for the Study of the Longer- Range Future, Boston University 2012-2014 Associate Professor, Dep’t. of Earth and Environment, Boston University 2006-2012 Associate Professor, Dep’t. of Geography and Environment, Boston University 2008, 2009 Visiting Fellow, Grantham Institute of Climate Change, Imperial College London 2007 Royal Society Visiting Scientist, Space and Atmospheric Physics Group, Dep't. of Physics, Imperial College London 2001-2006 Assistant Professor, Dep’t. of Geography and Environment, Boston University