Biological production of ligands influences iron chemistry in hydrothermal systems
For the first time, siderophores and siderophore-producing microbes were determined in 11 distinct hydrothermal plume environments.
Atlantic Ocean
Lead isotopes, reversible scavenging and ventilation processes in the South Atlantic Ocean
Olivelli and co-authors present seawater lead concentrations and lead isotopes for 10 depth profiles collected in the South Atlantic Ocean.
Two papers describe findings on Rare Earth Elements in the North Atlantic Ocean (GEOVIDE cruise)
Lagarde and co-authors investigated the Rare Earth Element cycle along the GA01 transect…
What are the drivers of the distributions of cadmium, nickel, zinc, copper and cobalt, manganese and aluminium in the Atlantic Ocean? Two papers are tackling this issue
Chen and co-authors reveal that the distributions of dissolved tracers at depth in the South Atlantic are predominantly controlled by the mixing of North Atlantic Deep Water and waters of Antarctic origin…
Strong lithogenic imprints in the Indian Ocean waters
Ueki and co-authors reported the first sectional distributions of zirconium, hafnium and niobium along a north-south track in the Indian Ocean.
Trace metal fluxes of cadmium, copper, lead and zinc from the Congo River into the South Atlantic Ocean are supplemented by atmospheric inputs
Liu and colleagues show that rainfall augments some fluxes of trace metals from the Congo River.
Hydrothermal Mercury – the natural story of a contaminant
An international team of researchers has established the first global estimate of hydrothermal mercury emissions from mid ocean ridge.
Using machine learning to accurately simulate the oceanic barium distribution
Mete and colleagues used machine learning to predict the global distribution of oceanic barium…
Overlooked riverine contributions of dissolved neodymium and hafnium to the Amazon estuary and oceans
Xu and colleagues investigated the isotopic composition of dissolved neodymium and hafnium along the entire salinity gradient of the Amazon estuary.
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.
Dissolved iron II deep concentrations re-estimated considering oxidation kinetic effets
Gonzalez-Santana and his collaborators demonstrated that the oxidation kinetic of the samples combined with analysis of triplicate subsamples led iron (II) concentrations to decrease with time.
Actinium-227 distribution traces at least three processes in the North Atlantic Ocean
Le Roy and colleagues report an oceanic section of Actinium-227 in the North Atlantic Ocean.
Terrestrial iron inputs and reverse weathering in the Amazon mouth
Understanding the key processes that condition the net input of chemical species to the ocean is an important challenge…
Internal tides, energetic dynamical processes that generate particle nepheloids at different depths
In this study, Barbot and co-authors identified the sites where internal tides are responsible for sediment resuspension…
Shelf sediments in the Benguela Upwelling System as a major source of trace metals to the shelf and eastern South Atlantic Ocean
Liu and her colleagues investigated dissolved trace metals distributions within the Benguela Upwelling System sampled from GEOTRACES GA08 cruise.
Linear correlation between Dissolved Gaseous Mercury and Dissolved Inorganic Carbon opens new modelling perspectives
Živković and his colleagues led a close study of the mercury speciation along the 40°S GEOTRACES section.
High resolution of dissolved and particulate barium distributions in the Atlantic and Pacific Ocean reveal the importance of the margin sources on the oceanic barium budget
Rahman and co-workers performed intensive samplings and analyses of barium along the GEOTRACES GA03 and GP16 transects.
High resolution of dissolved and particulate barium distributions in the Atlantic and Pacific Ocean reveal the importance of the margin sources on the oceanic Ba budget
Rahman and co-workers performed intensive samplings and analyses of barium along the GEOTRACES GA03 and GP16 transects.
The Arctic Ocean is a net source of micronutrients toward the North Atlantic through the gateway of Fram Strait
Krisch and colleagues present a flux budget for micronutrient exchange between the Arctic and the North Atlantic Ocean.
A better insight into parameters that control particle flux in the ocean
Xiang and co-workers compiled full ocean-depth size-fractionated particle data from three recent U.S. GEOTRACES cruises.
North African dust is an important (but not dominant) source of iron to the Gulf of Mexico
Hayes and colleagues have combined data to estimate how important North African dust could be as a source of iron to the Gulf of Mexico.
Nickel bioactive role in the oceans assessed by its isotopes
Lemaitre and her colleagues realized the simultaneous analysis of the dissolved nickel isotopes and concentrations in the North Atlantic.
When titanium is not always behaving as a lithogenic conservative tracer: an Amazon estuary story
They established the distribution of titanium in Amazon and Pará rivers and their related plume during the high discharge period.
Intense benthic nepheloid layers in the Northwest Atlantic Ocean lead to unexpected distributions of dissolved and particulate thorium-230 and protactinium-231
Chen and colleagues explore the behaviour of thorium-230 and protactinium-231 in the benthic nepheloid layers…
Retreat of large marine-terminating glaciers may increase iron supply to surface waters
The findings demonstrate that glacial retreat and loss of ice-shelves may potentially result in increases in dissolved iron supply to surface waters downstream of large marine terminating glaciers in future.
When lateral advective transport explains between 80 and 100% of the dissolved aluminium distribution
The results evidence that the effect of advection cannot be neglected in areas where a conjunction of significant horizontal dissolved aluminium gradients and significant horizontal currents is found.
Deep sea lithogenic weathering a source of iron colloids for the ocean
Homoky and co-workers determined the isotope composition of dissolved iron profiles in shallow surface sediments of the South Atlantic Uruguayan margin…
Spatial and temporal variability of bioactive trace metals, speciation and organic metal-binding ligands in the eastern Gulf of Mexico
Mellett and Buck present the concentrations of bioactive trace metals (Fe, Cu, Mn, Zn, Co, Ni, Cd, and Pb), Fe-and Cu-binding organic ligands, and electroactive Fe-binding humic substances in the eastern Gulf of Mexico.
Thorium-Protactinium fate across the tropical Atlantic Ocean: what reveals the water column-sediment coupling
Twenty seawater profiles and twenty core-top 231-protactinium and 230-thorium analyses were realised by Ng and colleagues along five depth transects across the northern tropical Atlantic open ocean.