Changing the cadmium : phosphorus paradigm?
The well-established strong linear relationship linking dissolved cadmium (Cd) and phosphorus (P) concentrations in seawater is at the origin of the attraction of Cd as a proxy for PO4 in […]
Science
This section presents the GEOTRACES scientific activities.
Nitrate isotope distributions on the US GEOTRACES North Atlantic cross-basin section
The distribution of the δ15N and the δ18O in the U.S. GEOTRACES North Atlantic zonal transect (GA03 section) provides an insight on the interaction between aspects of the circulation of […]
Dissolved gallium in the Beaufort Sea: a promising conservative water mass tracer
Mc Allister and Orians (2015, see reference below) present the first dissolved Ga (DGa) data ever reported in the Arctic. DGa behaves very conservatively, helping to constrain the mixing of […]
GEOTRACES Synthesis of Results
GEOTRACES has designed a three-pronged synthesis of results effort covering the main scientific themes of the programme: Supply and removal of trace elements and isotopes (TEIs) at ocean interfaces Internal cycling of […]
Unexpected magnitude of the hydrothermal iron inputs in the deep Pacific
Data from the US GEOTRACES Eastern Pacific Zonal Transect (EPZT, GP16) demonstrate that lateral transport of hydrothermal iron, manganese and aluminium extends up to 4000 km west of the southern […]
Coupling Rare Earth Elements concentrations, neodymium and radium isotopes: a powerful tool to decode environmental processes
For the first time, neodymium (Nd) isotopic compositions have been measured together with dissolved and colloidal Rare Earth Elements (REE) concentrations in the Amazon estuary salinity gradient, as part of […]
The potential of coupling high-resolution circulation models and geochemical tracers: example of the Mediterranean Sea
For the first time, a numerical study proposes the simulation of the anthropogenic tritium (3H) invasion as well as the distribution of its decay product helium-3 (3He) using a high-resolution […]
The sedimentary flux of dissolved rare earth elements to the ocean
This work highlights the importance of the sedimentary source of dissolved Rare Earth Elements (REE) to the oceanic waters. Indeed, strong subsurface REE concentration maxima are evidenced in pore fluids […]
Neodymium isotopic signature of the Ross Sea Water characterized
The first seawater neodymium isotopic compositions (εNd) and neodymium concentrations [Nd] profiles across the South Pacific circum-Antarctic fronts have been published recently (Basak et al., 2015, see reference below). Thanks to […]