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June 2026 - Issue #75
SCIENCE HIGHLIGHTS
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Zinc and lead isotopes reveal human footprint on the most remote oceanic regions
Benaltabet and co-workers analysed suspended particles collected on GEOTRACES GP21 cruise tracked from Chile to New Caledonia.
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Organic binding site heterogeneity controls amorphous ferric oxy-hydroxides oceanic sink
In oxygenated seawater iron binds to hydroxide ions, which results in authigenic Fe precipitation as amorphous ferric oxy-hydroxide...
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Microbial trace metal transport in distinct water masses of the Southern Indian Ocean
Zhang and colleagues used genes coding for membrane transporters as proxies to map the distribution of the uptake and efflux of the trace metals...
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Contraction of North Atlantic Deep Water during glacial times: a paradigm called into question
Blaser and co-authors propose a new distribution of deep-water masses in the Atlantic Ocean during the Last Glacial Maximum and the Heinrich Stadial 1...
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Authigenic radiogenic neodymium isotope composition traces millennial-scale overturning circulation variability in the Arabian Sea
The neodymium isotopic signature of the sediment authigenic fraction is, a priori, a valuable proxy for reconstructing deep-water mass trajectories...
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Magmatic activity at the Carlsberg Ridge in the Indian Ocean triggered by glacial sea-level variation
De and colleagues provide a high-resolution record of magmatic input and associated hydrothermal activity over the past 49 kyr from a core recovered from a magmatic segment of the slow-spreading Carlsberg Ridge in the Indian Ocean.
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A refined neodymium parameter modelling study reveals differing controls on neodymium cycling in the Atlantic and Pacific Oceans
Since neodymium isotopes are used as proxies for past ocean circulation and, more rarely, past weathering, constraining the modern Nd cycle is a major challenge for marine geochemists...
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Mercury content and isotopes in bird’s guano: a window to reconstruct past climates
By analysing peat cores, Chuxian Li and her colleagues have shown how populations of nesting seabirds have fluctuated on a sub-Antarctic Island over the last 8,000 years.
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GEOTRACES NEWS
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Don’t miss it! GEOTRACES Online Seminar #3 – 30 June 15:00 CEST
Topic: Atmospheric aerosol deposition to the global ocean
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GEOTRACES at Goldschmidt 2026!
There will be two exciting GEOTRACES sessions at Goldschmidt 2026!
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Deadline approaching! 2026 Call for Applications for the GEOTRACES Early Career Scientist Committee
Apply by 3 July 2026!
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Upcoming deadline! GEOTRACES Session and Workshop at XMAS2027, 12-15 January 2027, Xiamen, China
Abstracts can be submitted until 30 June 2026.
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BIO-Carbon Early Career Ocean Professionals Network: Survey
Exploring how ocean carbon–related samples and datasets are collected, managed, and shared across the research community.
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GEOTRACES INFORMATIONS
Dates

Intermediate Data Product (IDP)

Timeline for the upcoming GEOTRACES Intermediate Data Products
First deadline is 15th May 2027!
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Cruises

September – October 2026 (Tentative), postponed from June, GEOTRACES Section cruise GP08, Pacific Ocean.

8 December 2026 - 9 January 2027, EXPAND, Process Study GIpr14, Indian Ocean subtropical gyre.

16 January - 13 March 2027, MISO-2, Section cruise GS06, Southern Ocean.

13 February - 28 March 2027 (tentative dates), SPHINX, Process Study GIpr15, Southern Indian Ocean (Amsterdam St Paul region).

5 April - 19 May 2027, EXPAND, Process Study GIpr14, Indian Ocean subtropical gyre.

 

Complete list of forthcoming cruises

 

Events

30 June 2026 - 15:00 CEST, GEOTRACES Online Monthly Seminar, Seminar #3 "Atmospheric aerosol deposition to the global ocean".

12 - 17 July 2026, Goldschmidt 2026, Montreal, Quebec, Canada. Check GEOTRACES sessions!

25 Agust 2026 - 15:00 CEST, GEOTRACES Online Monthly Seminar, Seminar #4 "Particle dynamics, scavenging & aggregation".

19 - 20 October 2026, GEOTRACES Data Management Committee Annual Meeting, Xiamen, China.

21 - 23 October 2026, GEOTRACES Scientific Steering Committee Annual Meeting, Xiamen, China.

17 January 2026, XMAS 2027, Xiamen, China. Submit an abstract before 30 June!


Access the GEOTRACES calendar

GEOTRACES in Numbers

Cruises completed: 175
Section cruises completed: 54
Publications: 2790

Job/Student/Funding
Opportunities


Check the GEOTRACES website to view the latest opportunities posted, including:

Jobs

Postdoctoral Fellowship in Arctic Trace Metal Biogeochemistry, Université Laval, University of Victoria, Canada
Open until filled.
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PhD & Postdoctoral Positions in Earth Sciences, The Hebrew University of Jerusalem, Israel
HUJI invites applications for PhD candidates and postdoctoral researchers.
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Latest Publications

 

-      Griffiths, A., Leung, Y.-L., Bowie, A. R., East, M., Rehkämper, M., & van de Flierdt, T. (2026). Pathways and processes controlling the distribution of anthropogenic lead in the interior of the Southern Ocean. Geochimica et Cosmochimica Acta, 424, 158–175. doi:10.1016/j.gca.2026.05.019

-      Meng, Ilyas, M., Hopkins, J., Mahaffey, C., & Norman, L. (2026). Classification of Barents Sea water masses from cruise DY167 (RRS Discovery) in July-August 2023 using Optimum Multiparameter (OMP) analysis. Zenodo. doi:10.5281/ZENODO.18619607

-       Jiao, T., Cao, A., Zhang, J., Ren, J., Xin, Y., Shi, J., & Liu, Q. (2026). Water mass structure and ecological implications in the East China Sea: Insights from rare earth elements-based analysis in autumn. Marine Chemistry, 277, 104647. doi:10.1016/j.marchem.2026.104647

-       Middleton, J. T., Holzer, M., Closset, I., Jones, J., & Brzezinski, M. A. (2026). High‐Latitude Controls on the Silicon Isotope Composition of Silicic Acid in the South Pacific. Global Biogeochemical Cycles, 40. doi:10.1029/2025gb009008

-       Ruan, Y., Krisch, S., Browning, T. J., Moore, C. M., Esposito, M., Steffens, T., & Achterberg, E. P. (2026). Trace Metal Biogeochemistry in the Nordic Seas: Arctic and Atlantic Water Inflows Determine (Micro)Nutrient Availability. Global Biogeochemical Cycles, 40. doi:10.1029/2025gb008954

-       Zhao, P., Guo, Y., Al-Hashem, A. A., Wu, J., Song, H., Chen, X.-G., & Achterberg, E. P. (2026). Sources and distributions of a suite of underexplored particulate trace elements on the Southwest African shelf and slope. Frontiers in Marine Science, 13. doi:10.3389/fmars.2026.1828198

 

Access the GEOTRACES Publication Database

GEOTRACES Publication Best Practices

 

 ✓ Please include “GEOTRACES” in either the title, abstract or keywords of your GEOTRACES publications.

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Intermediate Data Product (IDP) data contributors: Please use the DOoR portal to add any new publication of your data included in the IDP.
To facilitate future synthesis activities (and database searches), we strongly encourage you to select in the DOoR form (dropdown menu) the process your publications address.

 ✓ Please help us to acknowledge support from SCOR in your publications as follows: 
“The International GEOTRACES Programme is possible in part thanks to the support from the U.S. National Science Foundation (Grant OCE-
OCE-2513154) to the Scientific Committee on Oceanic Research (SCOR).”

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Do you have an announcement (job or student opportunity, event) that you would like to see published on the GEOTRACES eNEwsletter?  Contact us at ipo@geotraces.org

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