Atmospheric deposition of soluble trace elements along the Atlantic Meridional Transect (AMT)
Open accessAbstract
We briefly review the role of atmospheric deposition measurements within the Atlantic Meridional Transect (AMT) programme and then go on to present new data on the soluble concentrations of a range of trace metals (Fe, Al, Mn, Ti, Zn, V, Ni and Cu) and major ions in aerosols collected along the AMT transect. The results allow us to identify emission sources of the trace metals particularly in terms of the relative importance of anthropogenic versus crustal sources. We identify strong gradients in concentrations and deposition for both crustal and anthropogenically sourced metals with much higher inputs to the North Atlantic compared to the South Atlantic, reflecting stronger land based emission sources in the Northern Hemisphere. We suggest anthropogenic sources of Ni and V may include an important component from shipping. We consider the extent to which these gradients are reflected in surface water concentrations of these metals based on the GEOTRACES water column trace metal data. We find there is a clear difference in the concentrations of surface water dissolved Al and Fe between the north and south Atlantic gyres reflecting atmospheric inputs. However for Mn, V or Ni, higher inputs to the North Atlantic compared to the South Atlantic are not clearly reflected in their water column concentrations.
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North Atlantic waters underlying the SAL dust plume are richer in Fe, Si, Al, Ti, Mn, P and other trace metals bio-essential for phytoplankton, in comparison with South Atlantic waters.
“Due to massive dust deposition, North Atlantic waters underlying the SAL dust plume are richer in Fe, Si, Al, Ti, Mn, P and other trace metals bio-essential for phytoplankton, in comparison with South Atlantic waters (Han et al., 2008;Ussher et al., 2013;Conway and John, 2014;Baker and Jickells, 2017).”
From African desert dust influences migrations and fisheries of the Atlantic skipjack-tuna (2023) · cites this paper as Baker and Jickells, 2017
The Introduction and §3.2 report higher dissolved Fe and Al in North Atlantic surface waters, consistent with greater Saharan dust input. But §3.2 finds little north–south difference in surface-water Mn despite higher deposition, and the Introduction says atmospheric Si has little effect on water-column biogeochemistry. The paper therefore does not support the claim that the waters are richer in the entire listed set of elements; page numbers are unavailable in our copy. (LLM, conf=0.90)
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- Baker, A.R. et al., 2014. Processing and aging in the atmosphere. In: Knippertz, P., Stuut, J.-B.W. (Eds.), Mineral Dust. Springer, Heidelberg.
- Bruland, K.W., Lohan, M.C., 2003. 6.02 -Controls of trace metals in seawater A2 - Holland, Heinrich D. In: Turekian, K.K. (Ed.), Treatise on Geochemistry. Pergamon, Oxford.
- Han, Q. et al., 2008. Constraining oceanic dust deposition using surface ocean dissolved Al. Global Biogeochem. Cycl. 22, GB2003. http://dx.doi.org/10.1029/ 2007GB002975. · DOI · Paper page
- Jickells, T. et al., 2014. Biogeochemical impacts of dust on the global carbon cycle. In: Knippertz, P., Struut, J.-B.W. (Eds.), Mineral Dust. Springer, Heidelberg.
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- Wu, J. et al., 2007. Dissolution of aerosol iron in the surface waters of the North Pacific and North Atlantic oceans as determined by a semicontinuous flow- through reactor method. Global Biogeochem. Cycl. 21, GB4010. http://dx.doi. org/10.1029/2006GB002851. · DOI
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African desert dust influences migrations and fisheries of the Atlantic skipjack-tuna
Rodríguez, S., Riera, R., Fonteneau, A., Alonso-Pérez, S., & López-Darias, J. (2023) · Atmospheric Environment · doi:10.1016/j.atmosenv.2023.120022 · Cited by 23 · see citing works
“…massive dust deposition, North Atlantic waters underlying the SAL dust plume are richer in Fe, Si, Al, Ti, Mn, P and other trace metals bio-essential for phytoplankton, in comparison with South Atlantic waters (Han et al., 2008; Ussher et al., 2013; Conway and John, 2014; Baker and Jickells, 2017).”
- Authors
- Baker, A. R., & Jickells, T. D.
- Affiliations
- University of East Anglia (GB)
- Corresponding author
- Jickells, Tim D.
- Venue
- Progress in Oceanography
- Publisher
- Elsevier BV
- Published
- 2017-11
- Volume
- 158
- Pages
- 41-51
- ISSN
- 0079-6611 (ISSN-L)
- OpenAlex
- W2537249563
- Cited by
- 79
- References
- 0
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 7 · 2023: 17 · 2022: 11 · 2021: 19 · 2020: 9 · 2019: 2 · 2018: 6 · 2017: 1 · 2016: 1
- FWCI
- 2.03
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Progress In Oceanography (publishedVersion, cc-by)
- UEA Digital Repository (University of East Anglia) (submittedVersion)
- Funders
- UK Natural Environment Research Council (NE/F017359/1)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Keywords
- atmospheric deposition, Atlantic Meridional Transect, anthropogenic sources, crustal source, North Atlantic, South Atlantic, ship emissions, nickel, vanadium, dissolved aluminum, dissolved iron, GEOTRACES, major ions
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