Publication Abstracts

Textor et al. 2006

Textor, C., M. Schulz, S. Guibert, S. Kinne, S.E. Bauer, Y. Balkanski, T. Berntsen, T. Berglen, O. Boucher, M. Chin, F. Dentener, T. Diehl, H. Feichter, D. Fillmore, S. Ghan, P. Ginoux, S. Gong, A. Grini, J. Hendricks, L. Horrowitz, I. Isaksen, T. Iversen, A. Kirkevag, D. Koch, J.E. Kristjansson, M. Krol, A. Lauer, J.F. Lamarque, X. Liu, V. Montanaro, G. Myhre, J. Penner, G. Pitari, S. Reddy, O. Seland, P. Stier, T. Takemura, and X. Tie, 2006: Analysis and quantification of the diversities of aerosol life cycles within AeroCom. Atmos. Chem. Phys., 6, 1777-1813, doi:10.5194/acp-6-1777-2006.

Simulation results of global aerosol models have been assembled in the frame of the AeroCom intercomparison exercise. In this paper, we analyze the life cycles of dust, sea salt, sulfate, black carbon and particulate organic matter as simulated by sixteen global aerosol models. The diversities among the models for the sources and sinks, burdens, particle sizes, water uptakes, and spatial dispersals have been established.

The AeroCom all-models-average emissions are dominated by the mass of sea salt (SS), followed by dust (DU), sulfate (SO4), particulate organic matter (POM), and finally black carbon (BC). Interactive parameterizations of the emissions and contrasting particles sizes of SS and DU, respectively, lead generally to higher diversities of these species, and for total aerosol, which they dominate in mass. The lower diversity of the emissions of the fine aerosols, BC, POM, and SO4, is due to the use of similar emission inventories, and does therefore not necessarily indicate a better understanding of their sources. The diversity of SO4-sources is mainly caused by the disagreement on depositional loss of precursor gases and on chemical production. The diversities of the emissions are passed on to the burdens, but the latter are also strongly affected by the model-specific treatments of transport and aerosol processes. The burdens decrease along DU, SS, SO4, POM, and BC.

Sea salt has the shortest residence time of about half a day, followed by SO4 and DU with four days, and POM and BC with six and seven days, respectively. Wet deposition rate is controlled by the solubility and increases from DU, BC, POM to SO4 and SS. It is the dominant sink for SO4, BC, and POM, and contributes about one third to the total removal rates of SS and DU species. For SS and DU we find high diversities for the removal rates and deposition pathways. Models do neither agree on the split between wet and dry deposition, nor on that between sedimentation and turbulent dry deposition. We diagnose an extremely high diversity for the uptake of ambient water vapor that influences the particle size and thus the sink rates. Furthermore, we find little agreement among the model results for the partitioning of wet removal into scavenging by convective and stratiform rain.

Large differences exist among the models for aerosol dispersal both in the vertical and in the horizontal direction. In some models, a minimum of aerosol concentrations is simulated at the surface. Aerosol dispersal is most pronounced for SO4 and BC and lowest for SS. Diversities are higher for meridional than for vertical dispersal, they are similar for a given species and highest for SS and DU. For these two components we do not find a correlation between vertical and meridional aerosol dispersal. In addition the degree of dispersals of SS and DU is not related to their residence times. SO4, BC, and POM, however, show increased meridional dispersal in models with larger vertical dispersal, and dispersal is larger for longer simulated residence times.

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BibTeX Citation

  author={Textor, C. and Schulz, M. and Guibert, S. and Kinne, S. and Bauer, S. E. and Balkanski, Y. and Berntsen, T. and Berglen, T. and Boucher, O. and Chin, M. and Dentener, F. and Diehl, T. and Feichter, H. and Fillmore, D. and Ghan, S. and Ginoux, P. and Gong, S. and Grini, A. and Hendricks, J. and Horrowitz, L. and Isaksen, I. and Iversen, T. and Kirkevag, A. and Koch, D. and Kristjansson, J. E. and Krol, M. and Lauer, A. and Lamarque, J. F. and Liu, X. and Montanaro, V. and Myhre, G. and Penner, J. and Pitari, G. and Reddy, S. and Seland, O. and Stier, P. and Takemura, T. and Tie, X.},
  title={Analysis and quantification of the diversities of aerosol life cycles within AeroCom},
  journal={Atmos. Chem. Phys.},

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RIS Citation

ID  - te00100w
AU  - Textor, C.
AU  - Schulz, M.
AU  - Guibert, S.
AU  - Kinne, S.
AU  - Bauer, S. E.
AU  - Balkanski, Y.
AU  - Berntsen, T.
AU  - Berglen, T.
AU  - Boucher, O.
AU  - Chin, M.
AU  - Dentener, F.
AU  - Diehl, T.
AU  - Feichter, H.
AU  - Fillmore, D.
AU  - Ghan, S.
AU  - Ginoux, P.
AU  - Gong, S.
AU  - Grini, A.
AU  - Hendricks, J.
AU  - Horrowitz, L.
AU  - Isaksen, I.
AU  - Iversen, T.
AU  - Kirkevag, A.
AU  - Koch, D.
AU  - Kristjansson, J. E.
AU  - Krol, M.
AU  - Lauer, A.
AU  - Lamarque, J. F.
AU  - Liu, X.
AU  - Montanaro, V.
AU  - Myhre, G.
AU  - Penner, J.
AU  - Pitari, G.
AU  - Reddy, S.
AU  - Seland, O.
AU  - Stier, P.
AU  - Takemura, T.
AU  - Tie, X.
PY  - 2006
TI  - Analysis and quantification of the diversities of aerosol life cycles within AeroCom
JA  - Atmos. Chem. Phys.
VL  - 6
SP  - 1777
EP  - 1813
DO  - 10.5194/acp-6-1777-2006
ER  -

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