Zinc and lead isotopes reveal human footprint on the most remote oceanic regions
Benaltabet and co-workers analysed suspended particles collected on GEOTRACES GP21 cruise tracked from Chile to New Caledonia.
Science
This section presents the GEOTRACES scientific activities.
Organic binding site heterogeneity controls amorphous ferric oxy-hydroxides oceanic sink
In oxygenated seawater iron binds to hydroxide ions, which results in authigenic Fe precipitation as amorphous ferric oxy-hydroxide…
Microbial trace metal transport in distinct water masses of the Southern Indian Ocean
Zhang and colleagues used genes coding for membrane transporters as proxies to map the distribution of the uptake and efflux of the trace metals…
Contraction of North Atlantic Deep Water during glacial times: a paradigm called into question
Blaser and co-authors propose a new distribution of deep-water masses in the Atlantic Ocean during the Last Glacial Maximum and the Heinrich Stadial 1…
Authigenic radiogenic neodymium isotope composition traces millennial-scale overturning circulation variability in the Arabian Sea
The neodymium isotopic signature of the sediment authigenic fraction is, a priori, a valuable proxy for reconstructing deep-water mass trajectories…
Magmatic activity at the Carlsberg Ridge in the Indian Ocean triggered by glacial sea-level variation
De and colleagues provide a high-resolution record of magmatic input and associated hydrothermal activity over the past 49 kyr from a core recovered from a magmatic segment of the slow-spreading Carlsberg Ridge in the Indian Ocean.
A refined neodymium parameter modelling study reveals differing controls on neodymium cycling in the Atlantic and Pacific Oceans
Since neodymium isotopes are used as proxies for past ocean circulation and, more rarely, past weathering, constraining the modern Nd cycle is a major challenge for marine geochemists…
Mercury content and isotopes in bird’s guano: a window to reconstruct past climates
By analysing peat cores, Chuxian Li and her colleagues have shown how populations of nesting seabirds have fluctuated on a sub-Antarctic Island over the last 8,000 years.
Do not mourn Nobias any longer: InertSep ME-2 is coming!
Thanks to the thorough development proposed by Alifia and co-workers, the community may have a solution to the shortage of Nobias Chelate PA-1…