Authors present a comprehensive review of iron and iron isotope sources, internal cycling, and sinks in the ocean.
Jan / 17 / 2023
Iron
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.
Oct / 21 / 2022
The Tonga arc, an iron boundary in the South West Pacific Ocean
As part of the TONGA GEOTRACES process study, Tilliette and colleagues identified high dissolved iron concentrations in the west of the Tonga arc.
Aug / 31 / 2022
Dust deposition rates extracted from a data-assimilation model of the aluminium oceanic cycle
Xu and Weber developed a data-assimilation model of the aluminum oceanic cycle.
Jan / 28 / 2022
Specific features characterize the dissolved iron distribution in the North Western Indian Ocean
Venkatesh Chinni and Sunil Kumar Singh propose dissolved iron profiles along two meridional transects realized during spring and fall seasons between the Arabian Sea and the sub-tropical western Indian Ocean…
Jan / 24 / 2022
Icebergs as sources of trace metals to the ocean: which impact?
Earth’s Ice Sheets are known to release significant quantities of lithogenic particles into the ocean every year, but how does this material affect trace metal availability in the ocean?
Oct / 18 / 2021
Volcanic emissions in the Southern Ocean: an efficient and unexpected source of iron for this remote area
This study suggests that volcanic emission can represent a significant source of bioavailable iron to open ocean anaemic ecosystems.
Sep / 20 / 2021
Surprising conservativity of trace metals along a costal embayment salinity gradient
Chen and co-workers analyzed an array of trace metals together with Rare Earth Elements in a salinity gradient in the Jinhae Bay, the largest semi-enclosed bay in South Korea…
Jul / 08 / 2021
Pros and cons of nine bioactive trace elements as tracers of modern and paleo-productivity
Horner and co-authors assess whether nine bioactive trace metals and their isotopes can be used as paleo-productivity proxies.
Jun / 30 / 2021
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.
May / 31 / 2021
Variable dissolution rates and fates of lithogenic tracers at the air-sea interface
Roy-Barman and co-authors established the dissolution rates from Saharan dust reaching Mediterranean seawater.
May / 04 / 2021
Manganese: a surprising co-limiting factor of phytoplankton growth in the Southern Ocean
One of the main consequences of this work is that manganese should be included in ocean-climate models, more particularly to improve the accuracy of their predictions in this area.
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…
Mar / 28 / 2021
First direct measurements of luxury iron uptake in natural phytoplankton communities: surprising results!
This study demonstrates the importance of biology and ecology to understanding iron biogeochemistry.
Mar / 19 / 2021
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.
Mar / 03 / 2021
When GEOTRACES‐based synthesis efforts improve global iron-cycling understanding
Using historical (1987-2007) and recent GEOTRACES data, authors compiled an impressive data set comprising dissolved, filtered and trap-collected particulate iron
Dec / 03 / 2020
Particulate trace element export in the North Atlantic Ocean
Authors estimated particulate trace element export fluxes and residence times in the upper North Atlantic Ocean
Nov / 12 / 2020
Surface water trace element and isotope data challenge dust flux models
Using measurements of dissolved and particulate thorium-230 and thorium-232 along a section across the South Pacific, authors estimated the dust flux over this remote area
Nov / 05 / 2020
Dissolved iron and manganese fates reveal processes along the hydrothermal TAG plume
Authors performed high-spatial resolution analyses of dissolved iron and manganese samples collected at the Mid Atlantic Ridge
Oct / 20 / 2020
A new model simulates the speciation and dispersion of hydrothermal iron
Roshan and collaborators present new observations of dissolved iron and its physical speciation in the South Pacific
Jun / 10 / 2020
Mechanisms driving biological CO2 drawdown in the Subarctic Pacific unraveled
Nishioka and co-authors compiled comprehensive data sets of iron and macronutrients covering the whole subarctic Pacific…
Jun / 04 / 2020
The biogeochemical ventures of dissolved iron and manganese across the Arctic Ocean
The spatial distributions and biogeochemical cycling of dissolved Fe (dFe) and dissolved manganese (dMn) across the Arctic Ocean were established during summer and fall 2015. The Canadian GEOTRACES transect extended […]
May / 15 / 2020
Loihi Seamount, hydrothermal Helium-3 and dissolved iron sources and their dispersion within the Pacific Ocean
As part of the GEOTRACES cruise GP15, Jenkins and co-workers (2020, see reference below) observed large water column anomalies in helium isotopes and trace metal concentrations above the Loihi Seamount […]
May / 04 / 2020
Oceanic Margins as sources of lithogenic particulate and dissolved iron in the North Pacific Ocean
Three GEOTRACES Japanese cruises on board the R/V Hakuho Maru allowed establishing basin-scale and full-depth sectional distributions of total dissolvable iron (tdFe), dissolved iron (dFe), and labile particulate iron (lpFe=tdFe […]
Mar / 10 / 2020
Is the global primary production at it’s maximum rate?
Lauderdale and co-authors (2020, see reference below) are seriously questioning the paradigm establishing that marine phytoplankton growth is limited by iron on a global scale. Iron availability to marine microbes […]
Feb / 25 / 2020
Can phytoplankton help us determine the bioavailability of iron in the world ocean?
Joint Science Highlight with US Ocean Carbon and Biogeochemistry (OCB). Iron (Fe) is a key element to life but in seawater it is present at extremely low concentrations. The scarcity […]
Feb / 24 / 2020
The Colloidal Hourglass: North Atlantic Iron Distribution Controlled by Dynamic Colloidal Phase
K. Kunde and colleagues (2019, reference below) show that a highly dynamic colloidal iron phase in the upper ocean and at the seafloor boundary controls the distribution of dissolved iron […]
Feb / 07 / 2020
Unprecedented iron delivery from the Congo River margin to the South Atlantic Gyre
Radium isotopes are used to demonstrate that make the Congo the most significant riverine source of iron to the South Atlantic.
Jan / 30 / 2020
Diatoms use a stolen bacterial gene to commit iron piracy
Joint Science Highlight with US-Ocean Carbon & Biogeochemistry (US-OCB). Much of the primary production in low-iron marine environments is carried out by diatoms, and therefore the details of how these […]
Jan / 23 / 2020
Icebergs; a huge but highly variable source of iron to the ocean
Icebergs have been speculated to constitute one of the largest fluxes of iron (Fe) into the polar oceans since the 1930s and thus recent increases in ice discharge around the […]
Dec / 16 / 2019