Tropical Rains Controlling Deposition of Saharan Dust Across the North Atlantic Ocean
| Autor: | Michèlle van der Does, Fleur C J van Crimpen, Geert-Jan A Brummer, Jan-Berend W Stuut, Natalie M. Mahowald, Laura F Korte, Hongbin Yu, Paquita Zuidema, Ute Merkel |
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| Přispěvatelé: | Earth and Climate |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
Mineral dust 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences complex mixtures Sedimentary depositional environment Organic matter dust deposition wet deposition 14. Life underwater SDG 14 - Life Below Water Atlantic Ocean 0105 earth and related environmental sciences chemistry.chemical_classification mineral dust Plume respiratory tract diseases ocean fertilization Geophysics Deposition (aerosol physics) Productivity (ecology) chemistry 13. Climate action Ocean fertilization General Earth and Planetary Sciences Environmental science Oceanic carbon cycle |
| Zdroj: | van der Does, M, Brummer, G J A, van Crimpen, F C J, Korte, L F, Mahowald, N M, Merkel, U, Yu, H, Zuidema, P & Stuut, J B W 2020, ' Tropical Rains Controlling Deposition of Saharan Dust Across the North Atlantic Ocean ', Geophysical Research Letters, vol. 47, no. 5, e2019GL086867, pp. 1-10 . https://doi.org/10.1029/2019GL086867 Geophysical Research Letters, 47(5):e2019GL086867, 1-10. American Geophysical Union |
| ISSN: | 0094-8276 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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