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Changing atmospheric acidity as a modulator of nutrient deposition and ocean biogeochemistry
Baker, A.R.; Kanakidou, M.; Nenes, A.; Myriokefalitakis, S.; Croot, P.L.; Duce, R.A.; Gao, Y.; Guieu, C.; Ito, A.; Jickells, T.D.; Mahowald, N.M.; Middag, R.; Perron, M.M.G.; Sarin, M.M.; Shelley, R.; Turner, D.R. (2021). Changing atmospheric acidity as a modulator of nutrient deposition and ocean biogeochemistry. Science Advances 7(28): eabd8800. https://dx.doi.org/10.1126/sciadv.abd8800

Additional data:
In: Science Advances. AAAS: New York. e-ISSN 2375-2548, more
Peer reviewed article  
Available in  Authors 
Document type: Review
Authors  Top 
  • Baker, A.R.
  • Kanakidou, M.
  • Nenes, A.
  • Myriokefalitakis, S.
  • Croot, P.L.
  • Duce, R.A.
  • Gao, Y., more
  • Guieu, C.
  • Ito, A.
  • Jickells, T.D.
  • Mahowald, N.M.
  • Middag, R., more
  • Perron, M.M.G.
  • Sarin, M.M.
  • Shelley, R.
  • Turner, D.R.
Abstract
    Anthropogenic emissions to the atmosphere have increased the flux of nutrients, especially nitrogen, to the ocean, but they have also altered the acidity of aerosol, cloud water, and precipitation over much of the marine atmosphere. For nitrogen, acidity-driven changes in chemical speciation result in altered partitioning between the gas and particulate phases that subsequently affect long-range transport. Other important nutrients, notably iron and phosphorus, are affected, because their soluble fractions increase upon exposure to acidic environments during atmospheric transport. These changes affect the magnitude, distribution, and deposition mode of individual nutrients supplied to the ocean, the extent to which nutrient deposition interacts with the sea surface microlayer during its passage into bulk seawater, and the relative abundances of soluble nutrients in atmospheric deposition. Atmospheric acidity change therefore affects ecosystem composition, in addition to overall marine productivity, and these effects will continue to evolve with changing anthropogenic emissions in the future.
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