Multiple TEIs

Where, how and which trace elements are released from dust at the sea surface?

Alex Baker and Tim Jickells (2017, see reference below) propose to answer to this question thanks to analysis of aerosols collected in the framework of the Atlantic Meridional Transect (AMT). They established the soluble concentrations of a range of trace metals (iron, aluminium, manganese, titanium, zinc, vanadium, nickel and copper) and major ions. They reveal […]

Jan / 25 / 2018

Dealing with the chemical speciation of the elements in the different oceanic realms

First paper of the SCOR working group on modelling chemical speciation in seawater (WG145) The form in which a trace element or other component of seawater is present, and its tendency to react, depends on its activity which is a complex function of temperature, pressure, salinity and often pH. The most widely used equations that […]

Oct / 04 / 2016

GEOTRACES publishes the motivations and description of its first Intermediate Data Product

GEOTRACES proposes an article that describes its first integrated and quality controlled Intermediate Data Product 2014 (IDP2014): the digital data package and the eGEOTRACES electronic Atlas that provides section plots and animated 3D scenes of the data. The 3D scenes provide geographical and bathymetric context crucial for tracer assessment and interpretation. With this release, GEOTRACES seeks to […]

Nov / 25 / 2015

Two GEOTRACES works question the present ocean chemical elements budgets

New revelations on the land-ocean flux of chemical elements are presented in two different papers highlighting the value of the ocean isotopic data. Both works reveal that the present quantification of the oceanic cycle of the chemical elements need to be revisited…a big question to dig in! When radiogenic and trace metal isotopes suggest that the […]

May / 15 / 2015

When direct mapping of diatoms reveals unexpected fate of trace metals in the twilight zone

Twining and co-authors (2014, see reference below) used synchrotron x-ray fluorescence mapping to measure macronutrients such phosphorus (P), sulphur (S), and silicon (Si), and also trace metals like iron (Fe), nickel (Ni) and zinc (Zn), in individual cells of a diatom specie during a spring bloom off New Zealand. They clearly show that P, S, […]

Jan / 20 / 2015

GEOTRACES: Changing the way we explore ocean chemistry

Read about the experiences and lessons learned in the planning and implementation of GEOTRACES international programme in a recent paper published in Oceanography. Anderson and co-authors present an extraordinary synthesis of the GEOTRACES programme showing the benefits of an international collaborative research effort such as GEOTRACES. It is hoped that this paper provides useful guidance to scientists […]

Apr / 01 / 2014

New method for measuring simultaneously trace metal concentrations on a very small volume of seawater

An automated, on-line extraction, flow-injection inductively coupled plasma mass spectrometry (ICP-MS) method is presented by Lagerström and co-authors for simultaneous determination of manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu) and zinc (Zn) in open ocean seawater samples. This fully automated commercially available system buffers the pH of the samples on-line and extracts […]

Nov / 27 / 2013