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Tropical rains controlling deposition of Saharan dust across the North Atlantic Ocean
van der Does, M.; Brummer, G.-J. A.; Crimpen; Korte, L.F.; Mahowald, N.M.; Merkel, U.; Yu; Zuidema; Stuut, J.-B.W. (2020). Tropical rains controlling deposition of Saharan dust across the North Atlantic Ocean. Geophys. Res. Lett. 47(5): e2019GL086867.

Additional data:
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, more
Peer reviewed article  

Available in  Authors 
  • NIOZ: NIOZ Open Repository 343005
  • NIOZ: NIOZ Open Repository - Accepted Manuscripts 343006 [ download pdf ]

Author keywords
    mineral dust; Atlantic Ocean; dust deposition; wet deposition; ocean fertilization

Authors  Top 
  • van der Does, M., more
  • Brummer, G.-J. A., more
  • Crimpen, F.C.J.
  • Korte, L.F., more
  • Mahowald, N.M.
  • Merkel, U.
  • Yu, H.
  • Zuidema, P.
  • Stuut, J.-B.W., more

    Mineral dust plays an important role in the atmospheric radiation budget as well as in the ocean carbon cycle through fertilization and by ballasting of settling organic matter. However, observational records of open‐ocean dust deposition are sparse. Here, we present the spatial and temporal evolution of Saharan dust deposition over 2 years from marine sediment traps across the North Atlantic, directly below the core of the Saharan dust plume, with highest dust fluxes observed in summer. We combined the observed deposition fluxes with model simulations and satellite observations and argue that dust deposition in the Atlantic is predominantly controlled by summer rains. The dominant depositional pathway changes from wet deposition in summer to dry deposition in winter. Wet deposition has previously been suggested to increase the release of dust‐derived nutrients and their bioavailability, which may be a key contributor to surface‐ocean productivity in remote and oligotrophic parts of the oceans.

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