Reduction of uncertainty in global black carbon direct radiative forcing constrained by observations

Rong Wang1, Yves Balkanski2, Olivier Boucher3, Philippe Ciais4, Gregory L Schuster5, Frédéric Chevallier4, Bjorn Hallvard Samset6, Myrto Valari7, Junfeng Liu8 and Shu Tao8, (1)Carnegie Institution for Science Stanford, Stanford, CA, United States, (2)LSCE, CEA CNRS UVSQ, 91191, Gif sur Yvette, France, Gif-Sur-Yvette Cedex, France, (3)LMD, Paris Cedex 05, France, (4)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, (5)NASA Langley Research Center, Hampton, VA, United States, (6)CICERO, Oslo, Norway, (7)Laboratoire de Météorologie Dynamique, Palaiseau Cedex, France, (8)Peking University, Beijing, China