IMIS | Lifewatch regional portal

You are here


[ report an error in this record ]basket (1): add | show Print this page

one publication added to basket [333936]
Dispersion of surface drifters in the Tropical Atlantic
van Sebille, E.; Zettler, E.; Wienders, N.; Amaral-Zettler, L.; Elipot, S.; Lumpkin, R. (2021). Dispersion of surface drifters in the Tropical Atlantic. Front. Mar. Sci. 7: 607426.

Additional data:
In: Frontiers in Marine Science. Frontiers Media: Lausanne. ISSN 2296-7745, more
Peer reviewed article  

Available in  Authors 

    Sargassum C.Agardh, 1820 [WoRMS]
Author keywords
    ocean currents; ocean dispersion; surface drifters; Sargassum; Tropical Atlantic

Authors  Top 
  • van Sebille, E.
  • Zettler, E., more
  • Wienders, N.
  • Amaral-Zettler, L., more
  • Elipot, S.
  • Lumpkin, R.


    The Tropical Atlantic Ocean has recently been the source of enormous amounts of floating Sargassum macroalgae that have started to inundate shorelines in the Caribbean, the western coast of Africa and northern Brazil. It is still unclear, however, how the surface currents carry the Sargassum, largely restricted to the upper meter of the ocean, and whether observed surface drifter trajectories and hydrodynamical ocean models can be used to simulate its pathways. Here, we analyze a dataset of two types of surface drifters (38 in total), purposely deployed in the Tropical Atlantic Ocean in July, 2019. Twenty of the surface drifters were undrogued and reached only ∼8 cm into the water, while the other 18 were standard Surface Velocity Program (SVP) drifters that all had a drogue centered around 15 m depth. We show that the undrogued drifters separate more slowly than the drogued SVP drifters, likely because of the suppressed turbulence due to convergence in wind rows, which was stronger right at the surface than at 15 m depth. Undrogued drifters were also more likely to enter the Caribbean Sea. We also show that the novel Surface and Merged Ocean Currents (SMOC) product from the Copernicus Marine Environmental Service (CMEMS) does not clearly simulate one type of drifter better than the other, highlighting the need for further improvements in assimilated hydrodynamic models in the region, for a better understanding and forecasting of Sargassum drift in the Tropical Atlantic.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors