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The effect of harmonized emissions on aerosol properties in global models – an AeroCom experiment

Textor, C. and Schulz, M. and Guibert, S. and Kinne, S. and Balkanski, Y. and Bauer, S. and Berntsen, T. and Berglen, T. and Boucher, O. and Chin, M. and Dentener, F. and Diehl, T. and Feichter, J. and Fillmore, D. and Ginoux, P. and Gong, S. and Grini, A. and Hendricks, J. and Horowitz, L. and Huang, P. and Isaksen, I. S. A. and Iversen, T. and Kloster, S. and Koch, D. and Kirkevåg, A. 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. E. and Pitari, G. and Reddy, M. S. and Seland, Ø. and Stier, P. and Takemura, T. and Tie, X. (2007) The effect of harmonized emissions on aerosol properties in global models – an AeroCom experiment. Atmospheric Chemistry and Physics, 7 (17). pp. 4489-4501. ISSN 1680-7316.

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The effects of unified aerosol sources on global aerosol fields simulated by different models are examined in this paper. We compare results from two AeroCom experiments, one with different (ExpA) and one with unified emissions, injection heights, and particle sizes at the source (ExpB). Surprisingly, harmonization of aerosol sources has only a small impact on the simulated inter-model diversity of the global aerosol burden, and consequently global optical properties, as the results are largely controlled by model-specific transport, removal, chemistry (leading to the formation of secondary aerosols) and parameterizations of aerosol microphysics (e.g., the split between deposition pathways) and to a lesser extent by the spatial and temporal distributions of the (precursor) emissions. The burdens of black carbon and especially sea salt become more coherent in ExpB only, because the large ExpA diversities for these two species were caused by a few outliers. The experiment also showed that despite prescribing emission fluxes and size distributions, ambiguities in the implementation in individual models can lead to substantial differences. These results indicate the need for a better understanding of aerosol life cycles at process level (including spatial dispersal and interaction with meteorological parameters) in order to obtain more reliable results from global aerosol simulations. This is particularly important as such model results are used to assess the consequences of specific air pollution abatement strategies.

Item Type:Article
Related URLs:
URLURL TypeDescription
Balkanski, Y.0000-0001-8241-2858
Krol, M.0000-0002-3506-2477
Lamarque, J. F.0000-0002-4225-5074
Additional Information:© Author(s) 2007. This work is licensed under a Creative Commons License. Received: 18 December 2006 – Published in Atmos. Chem. Phys. Discuss.: 2 February 2007; Revised: 19 June 2007 – Accepted: 3 July 2007 – Published: 30 August 2007. This work was supported by the European Projects PHOENICS (Particles of Human Origin Extinguishing “natural” solar radiation In Climate Systems) and CREATE (Construction, use and delivery of an European aerosol database), and the French space agency CNES (Centre National des Etudes Spatiales). The authors would like to thank the Laboratoire des Sciences du Climat et de l’Environnement, Gif-sur-Yvette, France, and the Max-Planck-Institut für Meteorologie, Hamburg, Germany. The work of O. Boucher forms part of the Climate Prediction Programme of the UK Department for the Environment, Food and Rural Affairs (DEFRA) under contract PECD 7/12/37. We are grateful to the editor and for the suggestions received from the reviewers that helped to improve the quality of this paper.
Issue or Number:17
Record Number:CaltechAUTHORS:TEXacp07
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Official Citation:Textor, C., Schulz, M., Guibert, S., Kinne, S., Balkanski, Y., Bauer, S., Berntsen, T., Berglen, T., Boucher, O., Chin, M., Dentener, F., Diehl, T., Feichter, J., Fillmore, D., Ginoux, P., Gong, S., Grini, A., Hendricks, J., Horowitz, L., Huang, P., Isaksen, I. S. A., Iversen, T., Kloster, S., Koch, D., Kirkevåg, A., Kristjansson, J. E., Krol, M., Lauer, A., Lamarque, J. F., Liu, X., Montanaro, V., Myhre, G., Penner, J. E., Pitari, G., Reddy, M. S., Seland, Ø., Stier, P., Takemura, T., and Tie, X.: The effect of harmonized emissions on aerosol properties in global models – an AeroCom experiment, Atmos. Chem. Phys., 7, 4489-4501, 2007.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9134
Deposited By: Archive Administrator
Deposited On:01 Nov 2007
Last Modified:09 Mar 2020 13:18

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