June 2021 - Issue #45
GEOTRACES Science Highlights
A new and more quantitative atlas of the deep-sea burial fluxes of major and trace elements
Among other findings, authors find that the new opal flux is roughly a factor of two increase over previous estimates having important implications for the global silicon cycle.
Updated compilation of the global continental and marine lithogenic neodymium isotopic measurements
This new compilation and gridded datasets offer a concrete way forward to improve the application of neodymium isotopes as a useful tracer of ocean circulation.
Neodymium concentrations and isotopes help disentangling Siberian river influences on the Arctic Ocean
Paffrath and co-autors followed the relative contributions of the main Siberian rivers to the waters of the Transpolar Drift using neodymium parameters.
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.
When lateral advective transport explains between 80 and 100% of the dissolved aluminium distribution
The results evidence that the effect of advection cannot be neglected in areas where a conjunction of significant horizontal dissolved aluminium gradients and significant horizontal currents is found.
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.
Virtual Special Issue "Cycles of trace elements and isotopes in the ocean - GEOTRACES and beyond" finalised
In addition to hosting the overview of the GEOTRACES Intermediate Data Product 2017, this special issue includes 30 other research articles that contribute to the International GEOTRACES mission.
Special Issue on Marine Particle Chemistry is complete!
Six papers in this collection report on results from the GEOTRACES programme. Together, they help to fill critical gaps in the knowledge of the role of particles and elements in marine biogeochemical cycles.
GEOTRACES endorsed as Ocean Decade Action
It's official! GEOTRACES has been selected by the United Nations as one of the first endorsed Ocean Decade Actions.
UPDATE on the release of the GEOTRACES Intermediate Data Product 2021
GEOTRACES will release the IDP2021 in November alongside a series of science webinars!
Release of version 1 of FeMIPeval ocean model assessment tool
FeMIPeval is designed to facilitate the assessment of ocean iron cycle models against GEOTRACES intermediate data product 2017 (IDP2017) via a set of different skill metrics in a systematic manner.
GEOTRACES Informations



17 July - 17 August 2021, MetalGate Process Study (GApr16), North Atlantic Ocean and seas around Iceland. 

Upcoming GEOTRACES or GEOTRACES-related events:

4 June to 24 August 2021, OCB Summer School, virtual meeting. 

22-27 June 2021ASLO 2021, virtual meeting. Check the list of GEOTRACES talks and sessions.

4-9 July 2021Goldschmidt 2021, virtual meeting. Check the list of GEOTRACES sessions.

26-30 July 2021, Iron at the Air-Sea Interface Workshop, Asheville, NC, USA. Register before 25 June! Workshop co-sponsored by GEOTRACES and SOLAS!

18-22 November 2021, IMBIZO - Buoyant Solutions for Ocean Sustainability, virtual meeting. Register before 30 June!

29 September - 1 October 2021, GEOTRACES Scientific Steering Committee, virtual meeting.

13-17 December 2021, AGU Fall Meeting 2021, New Orleans, LA and on-line. Check the GEOTRACES session. Submit an abstract before 4 August!


Access the GEOTRACES Calendar


Job Opportunities

Check the GEOTRACES website to view the latest job opportunities posted:

PhD position in Mediterranean Mercury Modeling, LSCE and MIO, France

Assistant Professor of Oceanography, Texas A&M University, USA

Postdoctoral position (m/f/d) in Biogeochemistry of Major Elements in the Atlantic and Pacific Oceans

Postdoctoral Research Associate – Marine Chemistry at The University of Southern Mississippi, USA



Latest Publications

- Buck, N. J., Barrett, P. M., Morton, P. L., Landing, W. M., & Resing, J. A. (2021). Energy dispersive X‐ray fluorescence methodology and analysis of suspended particulate matter in seawater for trace element compositions and an intercomparison with high‐resolution inductively coupled plasma‐mass spectrometry. Limnology and Oceanography: Methods, lom3.10433. https://doi.org/10.1002/lom3.10433

- Close, H. G., Lam, P. J., & Popp, B. N. (2021). Marine Particle Chemistry: Influence on Biogeochemical Cycles and Particle Export. ACS Earth and Space Chemistry, 5(5). https://doi.org/10.1021/acsearthspacechem.1c00091

- Conway, T. M., Horner, T. J., Plancherel, Y., & González, A. G. (2021). A decade of progress in understanding cycles of trace elements and their isotopes in the oceans. Chemical Geology, 580, 120381. https://doi.org/10.1016/j.chemgeo.2021.120381

- Deman, F., Fonseca‐Batista, D., Roukaerts, A., García‐Ibáñez, M. I., Le Roy, E., Thilakarathne, E. P. D. N., Elskens, M., Dehairs, F., Fripiat, F. (2021). Nitrate Supply Routes and Impact of Internal Cycling in the North Atlantic Ocean Inferred From Nitrate Isotopic Composition. Global Biogeochemical Cycles, 35(4), e2020GB006887. https://doi.org/10.1029/2020GB006887

- Latour, P., Wuttig, K., Merwe, P., Strzepek, R. F., Gault‐Ringold, M., Townsend, A. T., Holmes, T. M., Corkill, M., Bowie, A. R. (2021). Manganese biogeochemistry in the Southern Ocean, from Tasmania to Antarctica. Limnology and Oceanography, lno.11772. https://doi.org/10.1002/lno.11772

- Levier, M., Roy-Barman, M., Colin, C., & Dapoigny, A. (2021). Determination of low level of actinium 227 in seawater and freshwater by isotope dilution and mass spectrometry. Marine Chemistry, 233, 103986. https://doi.org/10.1016/J.MARCHEM.2021.103986

- Roshan, S., & DeVries, T. (2021). Global Contrasts Between Oceanic Cycling of Cadmium and Phosphate. Global Biogeochemical Cycles, 35(6), e2021GB006952. https://doi.org/10.1029/2021GB006952


Access the GEOTRACES Publication Database

GEOTRACES in Numbers

Cruises completed: 124
Section cruises completed: 42
Publications: 1610

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