Iron

Challenging results on iron bioavailability in the Southern Ocean

Fourquez and co-authors conducted dissolved iron uptake experiments with Phaeocystis antarctica…

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.

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.

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.

Do you want to know more about iron and its isotopes? This review is for you!

Authors present a comprehensive review of iron and iron isotope sources, internal cycling, and sinks in the 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…

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.

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.

Machine learning approach led to the first iron climatology

Huang and co-workers propose the first data-driven surface-to-seafloor dissolved iron climatology.

Distributions, boundary inputs, and scavenging processes of trace metals in the East Sea (Japan Sea)

Seo and his colleagues show pronounced atmospheric and shelf inputs of trace elements in the Japan Sea.

New trace metal data in the Seas of Japan and Okhotsk

Nakaguchi and colleagues realized full-depth and section distributions of traces metals collected from the Seas of Japan and Okhotsk.

Confrontation of two models to constrain the hydrothermal iron contribution to the Southern Ocean export production

Tagliabue and his co-workers compare the hydrothermal dissolved iron simulated by both models.

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.

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…

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?

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.

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…

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.

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.

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.

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…

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.

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.