Trace metal fluxes of Cd, Cu, Pb and Zn from the Congo River into the South Atlantic Ocean are supplemented by atmospheric inputs
Trace metal fluxes of Cd, Cu, Pb and Zn from the Congo River into the South Atlantic Ocean are supplemented by atmospheric inputs
The Congo River supplies vast quantities of trace metals (TMs) to the South Atlantic Ocean, but TM budgets for the Congo plume derived using radium isotopes for GEOTRACES cruise GA08 suggest additional input other than the river outflow. Considering the tight correlations between most dissolved TMs and salinity in the plume and the high rainfall during the wet season over the Congo shelf, we hypothesized that wet atmospheric deposition is a TM source to the Congo plume. Observed TM concentrations in rainwaters across the Congo shelf were mostly comparable to values from previous work in the North Atlantic and Mediterranean Sea. Wet deposition contributed the equivalent of 43% dCd, 21% dCu, 20% dPb and 68% dZn of the Congo River fluxes. Our findings show an important role of wet deposition in supplying TMs to the South Atlantic overlapping with the region that receives substantial TM fluxes from the Congo River.
Liu, Te
c1eea8b1-2c78-4167-b134-4bc983485fd9
Hopwood, Mark J.
afd5b07f-ef15-43cc-a3a8-d45bac77e6d2
Krisch, Stephan
2bbe1ba7-4a76-4d8b-a2a8-19670f35162f
Vieira, Lúcia H.
425feb9e-b6aa-41e6-a5d3-76fe53bbfdaf
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
12 December 2023
Liu, Te
c1eea8b1-2c78-4167-b134-4bc983485fd9
Hopwood, Mark J.
afd5b07f-ef15-43cc-a3a8-d45bac77e6d2
Krisch, Stephan
2bbe1ba7-4a76-4d8b-a2a8-19670f35162f
Vieira, Lúcia H.
425feb9e-b6aa-41e6-a5d3-76fe53bbfdaf
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Liu, Te, Hopwood, Mark J., Krisch, Stephan, Vieira, Lúcia H. and Achterberg, Eric P.
(2023)
Trace metal fluxes of Cd, Cu, Pb and Zn from the Congo River into the South Atlantic Ocean are supplemented by atmospheric inputs.
Geophysical Research Letters, 50 (24), [e2023GL107150].
(doi:10.1029/2023GL107150).
Abstract
The Congo River supplies vast quantities of trace metals (TMs) to the South Atlantic Ocean, but TM budgets for the Congo plume derived using radium isotopes for GEOTRACES cruise GA08 suggest additional input other than the river outflow. Considering the tight correlations between most dissolved TMs and salinity in the plume and the high rainfall during the wet season over the Congo shelf, we hypothesized that wet atmospheric deposition is a TM source to the Congo plume. Observed TM concentrations in rainwaters across the Congo shelf were mostly comparable to values from previous work in the North Atlantic and Mediterranean Sea. Wet deposition contributed the equivalent of 43% dCd, 21% dCu, 20% dPb and 68% dZn of the Congo River fluxes. Our findings show an important role of wet deposition in supplying TMs to the South Atlantic overlapping with the region that receives substantial TM fluxes from the Congo River.
Text
Geophysical Research Letters - 2023 - Liu - Trace Metal Fluxes of Cd Cu Pb and Zn From the Congo River Into the South
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Accepted/In Press date: 20 November 2023
e-pub ahead of print date: 12 December 2023
Published date: 12 December 2023
Identifiers
Local EPrints ID: 488300
URI: http://eprints.soton.ac.uk/id/eprint/488300
ISSN: 0094-8276
PURE UUID: 181a3c81-7e9c-4983-8a12-89138b0814ab
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Date deposited: 19 Mar 2024 18:12
Last modified: 19 Mar 2024 18:14
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Author:
Te Liu
Author:
Mark J. Hopwood
Author:
Stephan Krisch
Author:
Lúcia H. Vieira
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