December 2020 - Issue #42
GEOTRACES Science Highlights
Uranium-238 data and physical transports off the Peruvian coast are questioning the thorium-uranium export model
Authors determined insignificant advective and diffusive thorium-234 fluxes at 25 stations in the Peruvian oxygen minimum zone

When GEOTRACES‐based synthesis efforts improve global iron-cycling understanding
Using historical (1987-2007) and recent GEOTRACES data, authors compiled an impressive data set comprising dissolved, filtered and trap-collected particulate iron

Particulate trace element export in the North Atlantic Ocean
Authors estimated particulate trace element export fluxes and residence times in the upper North Atlantic Ocean

Surface water trace element and isotope data challenge dust flux models
Using measurements of dissolved and particulate thorium-230 and thorium-232 along a section across the South Pacific, authors estimated the dust flux over this remote area

Impressive number of datasets submitted by the final IDP2021 deadline
More than 2,760 datasets have been registered in DOoR by the final deadline of December 15, 2020. DOoR continues to accept submissions...
Follow the French GEOTRACES GS02 SWINGS cruise in the Southern Ocean
Major French contribution to the international GEOTRACES programme the SWINGS project involves 80 scientists (19 international laboratories, 6 countries).
Two synthesis articles resulting from the Joint GEOTRACES-PAGES Workshop available
They both assess the potential of a number of bioactive elements and their isotopes to inform on past ocean productivity.
New GEOTRACES webODV services released
The extractor has a fresher, clearer look as well as a new station selection feature by date and time. In addition, users can now plot and inspect their selected data.
GEOTRACES Informations


- Cruises:

15 December 2020 - 5 February 2021, Chinese Carbon-Fe Process Study (GPpr15), North Pacific Subtropical Gyre.

11 January - 8 March 2021, SWINGS section cruise (GS02), South West Indian Ocean.

1 July - 1 August 2021, MetalGate Process Study (GApr16), North Atlantic Ocean and seas around Iceland. This cruise was postponed due to the COVID-19 pandemic, new dates provided for reference only.

- Upcoming GEOTRACES or GEOTRACES-related events:

11-14 January 2021, Fifth Xiamen Symposium on Marine Environmental Sciences (XMAS-V), virtual conference (2h per day). The registration is open and free to all.

11-16 July 2021, 3rd GEOTRACES Summer School, Bremerhaven, Germany. More information will be available in early 2021.

17-23 July 2021, Gordon Research Conference (GRC) and Seminar (GRS) on Chemical Oceanography, Southern New Hampshire University, Manchester, NH, US.

26-30 July 2021, Iron at the Air-Sea Interface Workshop, Asheville, NC, USA. Register before 1st April 2021. Workshop co-sponsored by GEOTRACES and SOLAS!

Access the GEOTRACES Calendar


Latest Publications

- Benaltabet, T., Lapid, G., & Torfstein, A. (2020). Seawater Pb concentration and isotopic composition response to daily time scale dust storms in the Gulf of Aqaba, Red Sea. Marine Chemistry, 227, 103895. DOI:

- Boyle, E. A., Zurbrick, C., Lee, J.-M., Till, R., Till, C. P., Zhang, J., & Flegal, A. R. (2020). Lead and lead isotopes in the U.S. GEOTRACES East Pacific zonal transect (GEOTRACES GP16). Marine Chemistry, 227, 103892. DOI:

- He, Y., & Mason, R. P. (2021). Comparison of reactive gaseous mercury measured by KCl-coated denuders and cation exchange membranes during the Pacific GEOTRACES GP15 expedition. Atmospheric Environment, 244, 117973. DOI:

- Nakaguchi, Y., Ikeda, Y., Sakamoto, A., Zheng, L., Minami, T., & Sohrin, Y. (2020). Distribution and stoichiometry of Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb in the East China Sea. Journal of Oceanography, 1–23. DOI:

- Ng, H. C., Robinson, L. F., Rowland, G. H., Chen, S. S., & McManus, J. F. (2020). Coupled analysis of seawater and sedimentary 231Pa/230Th in the tropical Atlantic. Marine Chemistry, 227, 103894. DOI:

Access the GEOTRACES Publication Database

GEOTRACES in Numbers

Cruises completed: 121
Section cruises completed: 41
Publications: 1562

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Image par Gordon Johnson de Pixabay