Atmospheric deposition of soluble trace elements along the Atlantic Meridional Transect (AMT)

Baker, Alex R. and Jickells, Tim D. (2017) Atmospheric deposition of soluble trace elements along the Atlantic Meridional Transect (AMT). Progress in Oceanography, 158. pp. 41-51. ISSN 0079-6611

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Abstract

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.

Item Type: Article
Additional Information: Under a Creative Commons Attribution 4.0 International (CC BY 4.0) license
Uncontrolled Keywords: aerosols,trace metals,atlantic ocean
Faculty \ School: Faculty of Science > School of Environmental Sciences
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 12:03
Last Modified: 17 Mar 2020 22:27
URI: https://ueaeprints.uea.ac.uk/id/eprint/60726
DOI: 10.1016/j.pocean.2016.10.002

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