Extremely high radioactive levels in the manganese nodules
Volz and co-authors demonstrate that radioisotopes in the manganese nodules mostly exceed exempt activity levels…
Science Highlights
Some recent GEOTRACES science findings are reported below.
The North Pacific Ocean, a key actor for the zinc oceanic cycle
Sieber and his colleagues lift the veil on some of the mechanisms that control the behavior of zinc in the Pacific Ocean, and more globally.
Disentangling what controls the cadmium distribution in the Pacific Ocean
Sieber and his colleagues established the distribution of dissolved cadmium concentrations and isotopes in a section extending from Alaska to Tahiti.
Solid-solution distribution of the cosmogenic beryllium-7 in the water column
This work questions the validity and limits of the hypothesis that particulate beryllium-7 can be neglected in the oceanographic applications of this tracer.
Decoupling of barium and silicon at the Congo river-dominated Southeast Atlantic Margin: combined Barium and silicon isotope evidence
Zhang and co-authors conducted a comprehensive study to investigate the biogeochemical cycles of barium and silicon and their relationship…
A detailed study of the land-ocean input of dissolved iron, manganese and cobalt in the Northeast Atlantic Ocean
Chen and co-authors propose a detailed study of the spatial and seasonal distributions of dissolved iron, manganese and cobalt in the Northeast Atlantic continental margin.
Decline of the anthropogenic lead imprint to the ocean confirmed by data from the South West Atlantic Ocean
This study reveals that the mean lead concentrations in the surface waters of the western South Atlantic Ocean decreased by 34 % between the 1990s and 2011.
Irradiance-normalized non-photochemical quenching (NPQ): a new proxy of iron stress for phytoplankton
Ryan-Keogh and his colleagues used NPQ to fingerprint the photo-physiological response of phytoplankton to their environment.
Exhaustive modelling study of the oceanic neodymium parameters
The conclusion of this study reinforces the important role of the solid particles in driving the neodymium oceanic cycle.