Multiple TEIs

GEOTRACES: Get the right data!

Measuring concentrations of many constituents at the nano- to picomolar levels in seawater is a difficult challenge, requiring thorough intercalibration between the different laboratories participating to the same programme. GEOTRACES is but one example of a programme that has intercalibration as an essential component of its field-based efforts. The standing GEOTRACES Standards and Intercalibration Committee (S&I) […]

Oct / 24 / 2013

Substantial intra-basin variation of the dissolved metal/phosphorus ratio in the different water masses of the Indian Ocean

The first simultaneous, full-depth, and basin-scale section-distribution of dissolved (D) aluminum (Al), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu),  zinc (Zn), cadmium (Cd), and lead (Pb) is reported in the Indian Ocean. In addition to widespread co-limitation for phytoplankton production by dissolved iron (DFe) and occurrence of redox-related processes, the authors observe […]

May / 23 / 2013

Trace metals in deep ocean waters: A review

A synthesis on the data available on the distribution of selected trace metals (i.e. Cadmium, Cobalt, Copper, Molybdenum, Nickel, Lead and Zinc) in the deep ocean from 1979 to 2009 is provided by Aparicio-González and colleagues (Aparicio-González et al., 2012). This article also identifies patterns as well as gaps in currently available data in terms […]

Jul / 04 / 2012

Measuring precisely with only 40 ml of sample

It is now possible to measure precisely manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) concentrations in seawater using only 40 ml of sample. All the cooking recipes and techniques are given in the recent detailed article of Dondra Biller and Kenneth Bruland in Marine Chemistry […]

May / 03 / 2012

New strategy to evaluate trace element fluxes to the ocean from aerosols

Scientists participating in GEOTRACES have developed a new strategy to evaluate trace element fluxes to the ocean from aerosols (Hsieh et al, 2011). The new approach uses the common geochemical behaviour of two isotopes of the same chemical element (thorium;Th), whose sources to the surface seawater are totally different (and independent). 230Th is a decay product […]

Apr / 23 / 2012

GEOTRACES in the International Polar Year

The International Polar Year (IPY) 2007-2008 provided an excellent opportunity for a flying start of the GEOTRACES program. Major IPY GEOTRACES campaigns in the Arctic region (Figure 1) were the multiyear program on the iron cycle in the Sea of Okhotsk by Japan, the Swedish expedition in the Siberian Sea, the deep sections expedition of 10 weeks […]

Jul / 21 / 2011