Biogeosciences Discuss., 10, 14539-14593, 2013
© Author(s) 2013. This work is distributed
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This discussion paper is under review for the journal Biogeosciences (BG).
An improved ocean model of aluminium: the effects of circulation, sediment resuspension and biological incorporation
M. M. P. van Hulten1, A. Sterl1, R. Middag2,3,4, H. J. W. de Baar4,5, M. Gehlen6, J.-C. Dutay6, and A. Tagliabue7
1Royal Netherlands Meteorological Institute (KNMI), Utrechtseweg 297, 3731 GA De Bilt, the Netherlands
2University of Otago, 364 Leith Walk, Dunedin, 9016, New Zealand
3University of California Santa Cruz (UCSC), 1156 High Street, Santa Cruz, CA 95064, USA
4Royal Netherlands Institute for Sea Research (NIOZ), Landsdiep 4, 1797 SZ 't Horntje, Texel, the Netherlands
5University of Groningen (RUG), Postbus 72, 9700 AB Groningen, the Netherlands
6Laboratoire des Sciences du Climat et de l'Environnement (LSCE), LSCE-Orme, point courrier 129, CEA-Orme des Merisiers, 91191 Gif-sur-Yvette Cedex, France
7University of Liverpool, 4 Brownlow Street, Liverpool L69 3GP, UK

Abstract. The distribution of dissolved aluminium (Al) in the ocean is of interest because of its potential impact on diatom remineralisation and the use of surface ocean Al as a tracer for dust. Previously, the ocean Al concentration has been simulated reasonably well with only a dust source and scavenging as the removal process. In this study the simulation has been significantly improved by a more refined circulation and the addition of a sediment resuspension source. The latter confirms that the most significant sources of Al to the ocean are dust deposition and sediment resuspension. Simulations with biological incorporation have been performed as well. These show that this can be an important removal process. However, this study does not provide a definitive answer to the question what the relative amount of incorporation is compared to scavenging.

Citation: van Hulten, M. M. P., Sterl, A., Middag, R., de Baar, H. J. W., Gehlen, M., Dutay, J.-C., and Tagliabue, A.: An improved ocean model of aluminium: the effects of circulation, sediment resuspension and biological incorporation, Biogeosciences Discuss., 10, 14539-14593, doi:10.5194/bgd-10-14539-2013, 2013.
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