Articles | Volume 17, issue 9
https://doi.org/10.5194/acp-17-6023-2017
https://doi.org/10.5194/acp-17-6023-2017
Research article
 | 
16 May 2017
Research article |  | 16 May 2017

Downward particle fluxes of biogenic matter and Saharan dust across the equatorial North Atlantic

Laura F. Korte, Geert-Jan A. Brummer, Michèlle van der Does, Catarina V. Guerreiro, Rick Hennekam, Johannes A. van Hateren, Dirk Jong, Chris I. Munday, Stefan Schouten, and Jan-Berend W. Stuut

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Cited articles

Armstrong, R. A., Peterson, M. L., Lee, C., and Wakeham, S. G.: Settling velocity spectra and the ballast ratio hypothesis, Deep-Sea Res, Pt. II, 56, 1470–1478, https://doi.org/10.1016/j.dsr2.2008.11.032, 2009.
Baker, A. R., Kelly, S. D., Biswas, K. F., Witt, M., and Jickells, T. D.: Atmospheric deposition of nutrients to the Atlantic Ocean, Geophys. Res. Lett., 30, 2296, https://doi.org/10.1029/2003GL018518, 2003.
Berelson, W. M.: Particle settling rates increase with depth in the ocean, Deep-Sea Res. Pt II, 49, 237–251, 2002.
Bonnin, J., Van Haren, H., Hosegood, P., and Brummer, G.-J. A.: Burst resuspension of seabed material at the foot of the continental slope in the Rockall Channel, Mar. Geol., 226, 167–184, https://doi.org/10.1016/j.margeo.2005.11.006, 2006.
Bory, A. J. M. and Newton, P. P.: Transport of airborne lithogenic material down through the water column in two contrasting regions of the eastern subtropical North Atlantic Ocean, Global Biogeochem. Cy., 14, 297–315, https://doi.org/10.1029/1999GB900098, 2000.
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We collected Saharan dust at the Mauritanian coast as well as in the deep the North Atlantic Ocean, along a transect at 12 °N, using an array of moored sediment traps. We demonstrated that the lithogenic particles collected in the ocean are from the same source as dust collected on the African coast. With increasing distance from the source, lithogenic elements associated with clay minerals become more important relative to quartz which is settling out faster. Seasonality is prominent, but weak.
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