Publication Abstracts

Myhre et al. 2013

Myhre, G., B.H. Samset, M. Schulz, Y. Balkanski, S. Bauer, T.K. Berntsen, H. Bian, N. Bellouin, M. Chin, T. Diehl, R.C. Easter, J. Feichter, S.J. Ghan, D. Hauglustaine, T. Iversen, S. Kinne, A. Kirkevåg, J.-F. Lamarque, G. Lin, X. Liu, M.T. Lund, G. Luo, X. Ma, T. van Noije, J.E. Penner, P.J. Rasch, A. Ruiz, Ø. Seland, R.B. Skeie, P. Stier, T. Takemura, K. Tsigaridis, P. Wang, Z. Wang, L. Xu, H. Yu, F. Yu, J.-H. Yoon, K. Zhang, H. Zhang, and C. Zhou, 2013: Radiative forcing of the direct aerosol effect from AeroCom Phase II simulations. Atmos. Chem. Phys., 13, 1853-1877, doi:10.5194/acp-13-1853-2013.

We report on the AeroCom Phase II direct aerosol effect (DAE) experiment where 16 detailed global aerosol models have been used to simulate the changes in the aerosol distribution over the industrial era. All 16 models have estimated the radiative forcing (RF) of the anthropogenic DAE, and have taken into account anthropogenic sulphate, black carbon (BC) and organic aerosols (OA) from fossil fuel, biofuel, and biomass burning emissions. In addition several models have simulated the DAE of anthropogenic nitrate and anthropogenic influenced secondary organic aerosols (SOA). The model simulated all-sky RF of the DAE from total anthropogenic aerosols has a range from -0.58 to -0.02 Wm-2, with a mean of -0.27 Wm-2 for the 16 models. Several models did not include nitrate or SOA and modifying the estimate by accounting for this with information from the other AeroCom models reduces the range and slightly strengthens the mean. Modifying the model estimates for missing aerosol components and for the time period 1750 to 2010 results in a mean RF for the DAE of -0.35 Wm-2. Compared to AeroCom Phase I we find very similar spreads in both total DAE and aerosol component RF. However, the RF of the total DAE is stronger negative and RF from BC from fossil fuel and biofuel emissions are stronger positive in the present study than in the previous AeroCom study. We find a tendency for models having a strong (positive) BC RF to also have strong (negative) sulphate or OA RF. This relationship leads to smaller uncertainty in the total RF of the DAE compared to the RF of the sum of the individual aerosol components. The spread in results for the individual aerosol components is substantial, and can be divided into diversities in burden, mass extinction coefficient (MEC), and normalized RF with respect to AOD. We find that these three factors give similar contributions to the spread in results.

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BibTeX Citation

  author={Myhre, G. and Samset, B. H. and Schulz, M. and Balkanski, Y. and Bauer, S. and Berntsen, T. K. and Bian, H. and Bellouin, N. and Chin, M. and Diehl, T. and Easter, R. C. and Feichter, J. and Ghan, S. J. and Hauglustaine, D. and Iversen, T. and Kinne, S. and Kirkevåg, A. and Lamarque, J.-F. and Lin, G. and Liu, X. and Lund, M. T. and Luo, G. and Ma, X. and van Noije, T. and Penner, J. E. and Rasch, P. J. and Ruiz, A. and Seland, Ø. and Skeie, R. B. and Stier, P. and Takemura, T. and Tsigaridis, K. and Wang, P. and Wang, Z. and Xu, L. and Yu, H. and Yu, F. and Yoon, J.-H. and Zhang, K. and Zhang, H. and Zhou, C.},
  title={Radiative forcing of the direct aerosol effect from AeroCom Phase II simulations},
  journal={Atmos. Chem. Phys.},

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RIS Citation

ID  - my00100k
AU  - Myhre, G.
AU  - Samset, B. H.
AU  - Schulz, M.
AU  - Balkanski, Y.
AU  - Bauer, S.
AU  - Berntsen, T. K.
AU  - Bian, H.
AU  - Bellouin, N.
AU  - Chin, M.
AU  - Diehl, T.
AU  - Easter, R. C.
AU  - Feichter, J.
AU  - Ghan, S. J.
AU  - Hauglustaine, D.
AU  - Iversen, T.
AU  - Kinne, S.
AU  - Kirkevåg, A.
AU  - Lamarque, J.-F.
AU  - Lin, G.
AU  - Liu, X.
AU  - Lund, M. T.
AU  - Luo, G.
AU  - Ma, X.
AU  - van Noije, T.
AU  - Penner, J. E.
AU  - Rasch, P. J.
AU  - Ruiz, A.
AU  - Seland, Ø.
AU  - Skeie, R. B.
AU  - Stier, P.
AU  - Takemura, T.
AU  - Tsigaridis, K.
AU  - Wang, P.
AU  - Wang, Z.
AU  - Xu, L.
AU  - Yu, H.
AU  - Yu, F.
AU  - Yoon, J.-H.
AU  - Zhang, K.
AU  - Zhang, H.
AU  - Zhou, C.
PY  - 2013
TI  - Radiative forcing of the direct aerosol effect from AeroCom Phase II simulations
JA  - Atmos. Chem. Phys.
VL  - 13
SP  - 1853
EP  - 1877
DO  - 10.5194/acp-13-1853-2013
ER  -

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