Black carbon vertical profiles strongly affect its radiative forcing uncertainty
Overview & Synopsis
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.
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Document Information
| Document Title | Black carbon vertical profiles strongly affect its radiative forcing uncertainty |
|---|---|
| Author / Organization | Bjørn Samset, Gunnar Myhre, Michael Schulz, Yves Balkanski, S. Bauer, K. T. Berntsen, H. Bian, N. Bellouin, T. Diehl, C. R. Easter, S. J. Ghan, T. Iversen, S. Kinne, A. Kirkevåg, J.-F. Lamarque, G. Lin, X. Liu, J. E. Penner, Ø. Seland, B. R. Skeie, P. Stier, T. Takemura, K. Tsigaridis, K. Zhang |
| Subject & Discipline | Multidisciplinary Academic Open Research |
| Categories | Science & Mathematics |
| Publication Year | 2013 |
| License / Rights | Open Access / Creative Commons |
| Resource Verification | Listed PDF (Verification Pending) |
| Original Host Website |
HAL Open Science
(hal.science)
|
| File Format | application/pdf (Portable Document Format) |
| Language | EN |
| Catalog ID | DOC-183495 |
| Original Source Link | Visit Source Page on hal.science » |