The global mean energy balance under cloud-free conditions: an assessment based on direct observations and CMIP5 models

Martin Wild1, Maria Zita Hakuba1, Doris Folini2 and Charles N. Long3, (1)ETH Zurich, Zurich, Switzerland, (2)ETH Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland, (3)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States