Articles | Volume 14, issue 22
https://doi.org/10.5194/acp-14-12415-2014
https://doi.org/10.5194/acp-14-12415-2014
Research article
 | 
27 Nov 2014
Research article |  | 27 Nov 2014

Chemistry and mineralogy of clay minerals in Asian and Saharan dusts and the implications for iron supply to the oceans

G. Y. Jeong and E. P. Achterberg

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Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Aguilar-Islas, A. M., Wu, J., and Rember, R.: Dissolution of aerosol-derived iron in seawater: leach solution chemistry, aerosol type, and colloidal iron fraction, Mar. Chem., 120, 25–33, https://doi.org/10.1016/j.marchem.2009.01.011, 2010.
Avila, A., Queralt-Mitjans, I., and Alacón, M.: Mineralogical composition of African dust delivered by red rains over northeastern Spain, J. Geophys. Res., 102, 21977–21996, 1997.
Baker, A. R. and Croot, P. L.: Atmospheric and marine controls on aerosol iron solubility in seawater, Mar. Chem., 120, 4–13, https://doi.org/10.1016/j.marchem.2008.09.003, 2010.
Baker, A. R. and Jickells, T. D.: Mineral particle size as a control on aerosol iron solubility, Geophys. Res. Lett., 33, L17608, https://doi.org/10.1029/2006GL026557, 2006.
Bopp, L., Kohfeld, K. E., and Quere, C. L.: Dust impact on marine biota and atmospheric CO2 during glacial periods, Paleoceanography, 18, 1046, https://doi.org/10.1029/2002PA000810, 2003.
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Short summary
Mineral dust supplies iron to remote oceans, stimulating phytoplankton growth and carbon dioxide decrease. Iron-bearing clay minerals are the dominant phase in mineral dust. However, their mineralogical properties are largely unknown. We first determined microstructures and chemical compositions of the clay minerals in individual dust particles by transmission electron microscopy. Nanocrystalline illite-smectite series clay minerals and iron-rich chlorite are probably important sources of iron.
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