Authors

B.H. Samset, Center for International Climate and Environmental Research-Oslo (CICERO), Oslo, Norway
G. Myhre, Center for International Climate and Environmental Research-Oslo (CICERO), Oslo, Norway
M. Schulz, Norwegian Meteorological Institute, Oslo, Norway
Y. Balkanski, Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France
S. Bauer, Columbia Earth Institute, NY
T.K. Berntsen, Center for International Climate and Environmental Research-Oslo (CICERO), Oslo, Norway
H. Bian, University of Maryland
N. Bellouin, Met Office Hadley Centre, Exeter, United Kingdom
T. Diehl, NASA Goddard Space Flight Center, Greenbelt, MD; Universities Space Research Association, Columbia, MD
R.C. Easter, Pacific Northwest National Laboratory, Richland, WA
S.J. Ghan, Pacific Northwest National Laboratory, Richland, WA
T. Iversen, Norwegian Meteorological Institute, Oslo, Norway; University of Oslo, Norway; ECMWF, Reading, United Kingdom
S. Kinne, Max Planck Institute for Meteorology, Hamburg, Germany
A. Kirkeväg, Norwegian Meteorological Institute, Oslo, Norway
J. -F. Lamarque, National Center for Atmospheric Research, Boulder, CO
G. Lin, University of Michigan
Xiaohong Liu, University of Wyoming; Pacific Northwest National Laboratory, Richland, WA
J.E. Penner, University of Michigan
O. Seland, Norwegian Meteorological Institute, Oslo, Norway
R.B. Skeie, Center for International Climate and Environmental Research-Oslo (CICERO), Oslo, Norway
P. Stier, University of Oxford, United Kingdom
T. Takemura, Kyushu University, Fukuoka, Japan
K. Tsigaridis, Columbia Earth Institute, NY
K. Zhang, Pacific Northwest National Laboratory, Richland, WA; Max Planck Institute for Meteorology, Hamburg, Germany

Document Type

Article

Publication Date

3-1-2013

Abstract

The impact of black carbon (BC) aerosols on the global radiation balance is not well constrained. Here twelve global aerosol models are used to show that at least 20% of the present uncertainty in modeled BC direct radiative forcing (RF) is due to diversity in the simulated vertical profile of BC mass. Results are from phases 1 and 2 of the global aerosol model intercomparison project (AeroCom). Additionally, a significant fraction of the variability is shown to come from high altitudes, as, globally, more than 40% of the total BC RF is exerted above 5 km. BC emission regions and areas with transported BC are found to have differing characteristics. These insights into the importance of the vertical profile of BC lead us to suggest that observational studies are needed to better characterize the global distribution of BC, including in the upper troposphere. © 2013 Author(s).

DOI

10.5194/acp-13-2423-2013

Comments

Copyright 2013. The Authors

Creative Commons License

Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.

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