Articles | Volume 17, issue 6
Atmos. Chem. Phys., 17, 3799–3821, 2017
https://doi.org/10.5194/acp-17-3799-2017

Special issue: The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

Atmos. Chem. Phys., 17, 3799–3821, 2017
https://doi.org/10.5194/acp-17-3799-2017

Research article 20 Mar 2017

Research article | 20 Mar 2017

Sensitivity of transatlantic dust transport to chemical aging and related atmospheric processes

Mohamed Abdelkader et al.

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Cited articles

Abdelkader, M., Metzger, S., Mamouri, R. E., Astitha, M., Barrie, L., Levin, Z., and Lelieveld, J.: Dust-air pollution dynamics over the eastern Mediterranean, Atmos. Chem. Phys., 15, 9173–9189, https://doi.org/10.5194/acp-15-9173-2015, 2015.
Abouchami, W., Näthe, K., Kumar, A., Galer, S. J., Jochum, K. P., Williams, E., Horbe, A. M., Rosa, J. W., Balsam, W., Adams, D., Mezger, K., and Andreae, M. O.: Geochemical and isotopic characterization of the Bodélé Depression dust source and implications for transatlantic dust transport to the Amazon Basin, Earth Planet. Sci. Lett., 380, 112–123, https://doi.org/10.1016/j.epsl.2013.08.028, 2013.
Adams, A. M., Prospero, J. M., and Zhang, C.: CALIPSO-Derived Three-Dimensional Structure of Aerosol over the Atlantic Basin and Adjacent Continents, J. Climate, 25, 6862–6879, https://doi.org/10.1175/JCLI-D-11-00672.1, 2012.
Alexander, J. M., Grassian, V. H., Young, M. A., and Kleiber, P. D.: Optical properties of selected components of mineral dust aerosol processed with organic acids and humic material: Optical Properties of Mineral Dust, J. Geophys. Res.-Atmos., 120, 2437–2452, https://doi.org/10.1002/2014JD022782, 2015.
Alizadeh-Choobari, O., Sturman, A., and Zawar-Reza, P.: A global satellite view of the seasonal distribution of mineral dust and its correlation with atmospheric circulation, Dynam. Atmos. Oceans, 68, 20–34, https://doi.org/10.1016/j.dynatmoce.2014.07.002, 2014.
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We present a modeling study on the impacts of the key processes (dust emission flux, convection and dust aging parameterizations) that control the transatlantic dust transport using an advanced version of the EMAC atmospheric chemistry general circulation model. We define the direct effect of dust aging as an increase in the AOD as a result of hygroscopic growth. We define the indirect effect as a reduction in the dust AOD due to the higher removal of the aged dust particles.
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