Trace Metal Fluxes of Cd, Cu, Pb and Zn From the Congo River Into the South Atlantic Ocean Are Supplemented by Atmospheric Inputs

Liu，Te1; Hopwood，Mark J.2; Krisch，Stephan1,3; Vieira，Lúcia H.1; Achterberg，Eric P.1

2023-12-28

10.1029/2023GL107150

Geophysical Research Letters   影响因子和分区

0094-8276

1944-8007

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.

Congo plume Congo River GEOTRACES trace metals wet depositions

SCI ; EI

英语

其他

WOS:001122420600001

20235015218281

Budget control ; Deposition ; Meteorological problems ; Trace elements

Atmospheric Properties:443.1 ; Chemical Operations:802.3

GEOSCIENCES

2-s2.0-85179344195

Scopus

1.GEOMAR Helmholtz Centre for Ocean Research Kiel,Kiel,Germany
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,China
3.Now at Federal Institute of Hydrology,Koblenz,Germany

Liu，Te,Hopwood，Mark J.,Krisch，Stephan,et al. Trace Metal Fluxes of Cd, Cu, Pb and Zn From the Congo River Into the South Atlantic Ocean Are Supplemented by Atmospheric Inputs[J]. Geophysical Research Letters,2023,50(24).

Liu，Te,Hopwood，Mark J.,Krisch，Stephan,Vieira，Lúcia H.,&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).

Liu，Te,et al."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(2023).