Maria Zita Hakuba, Jet Propulsion Laboratory, Caltech, Pasadena, United States, Peter Pilewskie, University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, United States, Graeme L Stephens, Jet Propulsion Laboratory, Pasadena, United States, Jake Gristey, CIRES/NOAA/LASP, Boulder, United States, Daniel Feldman, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, William Drew Collins, Berkeley Lab and UC Berkeley, Berkeley, United States, Xiang Zhong, University of Arizona, Hydrology and Atmospheric Sciences, Tucson, United States, Alejandro Bodas-Salcedo, Met Office Hadley Centre, Exeter, United Kingdom and Xianglei Huang, University of Michigan Ann Arbor, Department of Climate and Space Sciences and Engineering, Ann Arbor, MI, United States