Dispersion of Surface Drifters in the Tropical Atlantic
| Autor: | van Sebille, Erik, Zettler, Erik, Wienders, Nicolas, Amaral-Zettler, Linda, Elipot, Shane, Lumpkin, Rick, Sub Physical Oceanography, Marine and Atmospheric Research |
|---|---|
| Přispěvatelé: | Sub Physical Oceanography, Marine and Atmospheric Research, Freshwater and Marine Ecology (IBED, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences lcsh:QH1-199.5 Ocean Engineering Tropical Atlantic lcsh:General. Including nature conservation geographical distribution ocean currents Aquatic Science Environmental Science (miscellaneous) Oceanography 01 natural sciences ocean dispersion surface drifters 14. Life underwater Dispersion (water waves) lcsh:Science 0105 earth and related environmental sciences Water Science and Technology Shore geography Global and Planetary Change geography.geographical_feature_category biology 010604 marine biology & hydrobiology Ocean current Sargassum Surface velocity biology.organism_classification Drifter lcsh:Q Geology |
| Zdroj: | Frontiers in Marine Science, 7. Frontiers Media S.A. Frontiers in Marine Science, Vol 7 (2021) Frontiers in Marine Science Frontiers in Marine Science, 7:607426. Frontiers |
| ISSN: | 2296-7745 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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