Sedimentary controls on seawater nickel distributions and nickel isotope compositions: a two steps study
Nickel isotopic mass balance in the ocean stands among the less understood so far…
Science Highlights
Some recent GEOTRACES science findings are reported below.
23 million years of productivity reconstructed in the Central Pacific Ocean using past and modern proxies
Using diverse geochemical proxies, Chu and colleagues analysed an iron–manganese crust to reconstruct central Pacific productivity over the past 23 million years.
Lead isotopes reveal that hydrothermal variability is driven by Sea‐Level change and transient magmatism
De and colleagues present the first millennial-scale reconstruction of hydrothermal variability at a mid-ocean ridge using lead isotopes from iron-manganese coatings…
Long-range transport of iron via the Agulhas Current and counter-current: a boon for the phytoplankton
Authors establish that significant iron fertilisation via the Agulhas current explains the Indian Subantarctic blooms…
Hydrothermal activity detected above the ultra-slow South West Indian Ridge, using a multi-proxy approach
Baudet and colleagues demonstrate the occurrence of hydrothermal venting on the Southwest Indian Ridge…
To Ba or not to Ba: Evaluating water column excess particulate barium as a proxy for water column respiration
Rahman and co-workers examine the relationship between excess particulate barium and organic matter respiration in the water column…
Assessment of the Solomon Sea’s dissolved iron contribution to the Equatorial Under Current
Sarthou and co-workers analysed 11 vertical profiles of dissolved iron at the entrance, within, and at the exit of the Solomon Sea…
Major controls on the fate of dissolved manganese in the northeastern Indian Ocean
Malla and Singh investigated the key factors controlling dissolved manganese in the northeastern Indian Ocean…
An original approach to assess the particulate trace metal concentrations in seawater
Sohrin and co-workers propose defining particulate trace metal as the difference between total dissolvable and dissolved metals after a long storage of filtered and unfiltered acidified seawater…