Samset, B. H., Myhre, G., Schulz, M., Balkanski, Y., Bauer, S., Berntsen, T. K., Bian, H., Bellouin, N., Diehl, T., Easter, R. C., Ghan, S. J., Iversen, T., Kinne, S., Kirkevåg, A., Lamarque, J.-F., Lin, G., Liu, X., Penner, J. E., Seland, Ø., Skeie, R. B., Stier, P., Takemura, T., Tsigaridis, K. and Zhang, K.
Black carbon vertical profiles strongly affect its radiative forcing uncertainty.
Atmospheric Chemistry and Physics, 13 (5).
To link to this article DOI: 10.5194/acp-13-2423-2013
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.
|Date Deposited:||31 Oct 2013 15:43|
|Last Modified:||15 Jan 2017 07:35|
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