- Testament of the efficiency of environmental policies
Human activities, such as the combustion of leaded petrol, emissions from non-ferrous metal smelting, coal combustion and waste incineration constitute major environmental lead (Pb) sources during the past century. This resulted in a considerable increase of anthropogenic Pb in the surface and deep waters of the North Atlantic, large enough to mask the natural lead signal...
- Lithogenic influence from the Hawaiian Islands detectable up to Station ALOHA surface waters
By coupling neodymium and radium isotopes and Rare Earth Element signals, Henning Fröllje and co-workers show that the coastal Hawaiian waters are affected by a prominent lithogenic influence from the Hawaiian Islands...
- Inference about rates of thorium and particle cycling in the ocean water column
Insoluble thorium (Th) isotopes are particle reactive while their radioactive parents are fairly soluble. This difference of behaviour has allowed chemical oceanographers to use Th isotopes to develop understanding about the scavenging of particle reactive elements and the cycling of particles in the water column. However, many prior models rely on numerous assumptions...
- Hydrothermalism: a major contributor to the oceanic inventory of dissolved zinc
High-quality dataset of dissolved zinc (Zn) from the US GEOTRACES EPZT cruise (GP16 section) allows Roshan and co-workers to revisit the oceanic budget of dissolved Zn. These investigators have observed a basin-scale transport of mantle-derived dissolved Zn from the hydrothermal vents of the East Pacific Rise...
The workshop, focused on setting priorities for exploiting GEOTRACES data to advance scientific objectives at the interface between marine geochemistry and marine ecology, was jointly sponsored by the GEOTRACES Program and by the Ocean Carbon and Biochemistry activity of the U.S. Carbon Cycle Science Program.
The plenary presentations from the Workshop are posted on the Workshop website. They can be opened and downloaded directly from the agenda.
- 2016 GEOTRACES Scientific Steering Committee Meeting held in Toulouse
The GEOTRACES Scientific Steering Committee (SSC) was held from 14-16 September at the LEGOS (University Paul Sabatier, Toulouse, France). The meeting was hosted by the GEOTRACES International Project Office.
Among the topics for dicussion there was the review of the status of the next GEOTRACES Intermediate Data Product (IDP2017) as well as the details of its release at the Goldschmidt Conference (13-17 August 2017, Paris, France).
-Bridgestock, L., van de Flierdt, T., Rehkämper, M., Paul, M., Middag, R., Milne, A., Lohan, M.C., Baker, A.R., Chance, R., Khondoker, R., Strekopytov, S., Humphreys-Williams, E., Achterberg, E.P., Rijkenberg, M.J.A., Gerringa, L. J.A., de Baar, H. J. W. (2016). Return of naturally sourced Pb to Atlantic surface waters. Nature Communications, 7, 12921.doi: 10.1038/ncomms12921.
-Aggarwal, S. K. (2016). A review on the mass spectrometric analysis of thorium. Radiochimica Acta, 104(7). doi: 10.1515/ract-2015-2559.
- Margolin, A. R., Gerringa, L. J. A., Hansell, D. A., & Rijkenberg, M. J. A. (2016). Net removal of dissolved organic carbon in the anoxic waters of the Black Sea. Marine Chemistry, 183, 13–24. doi: 10.1016/j.marchem.2016.05.003.
- Turner, D. R., Achterberg, E. P., Chen, C.-T. A., Clegg, S. L., Hatje, V., Maldonado, M. T., Sander, G.S., van den Berg, C.M.G., Wells, M. (2016). Toward a Quality-Controlled and Accessible Pitzer Model for Seawater and Related Systems. Frontiers in Marine Science, 3, 139. doi: 10.3389/fmars.2016.00139.
- Weigand, M. A., Foriel, J., Barnett, B., Oleynik, S., & Sigman, D. M. (2016). Updates to instrumentation and protocols for isotopic analysis of nitrate by the denitrifier method. Rapid Communications in Mass Spectrometry, 30(12), 1365–1383. doi: 10.1002/rcm.7570.
Banner 3D scene figure: 3D scene showing the distribution of dissolved iron in the Atlantic Ocean. Source: Schlitzer, R., eGEOTRACES - Electronic Atlas of GEOTRACES Sections and Animated 3D Scenes, http://www.egeotraces.org, 2014.