The South African National Antarctic Programme (SANAP) is proud to highlight the successful hosting of the 4th GEOTRACES Summer School, held in Cape Town, South Africa, from 17–21 November 2025. This prestigious international training event brought together 35 students and 19 GEOTRACES scientists from across the globe, reinforcing the importance of collaboration in advancing oceanographic and trace metal research. Supported by the French National Centre for Scientific Research (CNRS) and the Scientific Committee on Oceanic Research (SCOR), the summer school served as an essential platform for equipping PhD candidates and early career researchers with the knowledge and skills necessary to understand the biogeochemical cycles of trace metals in the world’s oceans. These cycles play a crucial role in regulating marine ecosystems, influencing climate processes, and shaping global biogeochemical dynamics.
Building Global Connections and Sharing Knowledge – A central goal of the GEOTRACES Summer School is to foster meaningful collaboration and knowledge exchange among emerging scientists. Participants were assigned to diverse working groups intended to strengthen networking, encourage interdisciplinary thinking, and build long-term scientific partnerships. These groups formed the basis of practical activities, poster sessions, and the week’s learning programme.
Prizewinners above with organising committee: l-r Thomas Ryan-Keogh, Hélène Planquette, Ruth Hawley, University Southampton (UK), CJ Denault, University of Minnesota (USA), Michael Julian Haryanto, University of Toyama (Japan), Ryan Cloete, Susanne Fietz. The organising committee—Hélène Planquette (CNRS), Susanne Fietz (Stellenbosch University), Thomas Ryan-Keogh (National Oceanography Centre), and Ryan Cloete (Stellenbosch University)—curated an intensive and enriching schedule combining expert lectures with hands-on training.
Insightful Lectures – Participants were privileged to learn from internationally recognised researchers who shared their expertise across a wide range of GEOTRACES-relevant themes, including sampling techniques, trace element isotopes, atmospheric processes, paleoceanography, modelling, and science communication. Lecture Programme Highlights:
- Greg Cutter (Old Dominion University): Planning and executing a GEOTRACES cruise
- Rob Middag (NIOZ; University of Groningen): Trace metal clean sampling and analysis – past and present approaches
- Hélène Planquette (CNRS): Intercalibration
- Jessica Fitzsimmons (Texas A&M University): Physicochemical speciation and its role in oceanic metal sinks
- Alessandro Tagliabue (University of Liverpool): Predicting climate-change impacts on trace element and isotope (TEI) cycles for IPCC assessments
- Adi Torfstein (Hebrew University of Jerusalem): Trace element particulate fluxes in the ocean
- William (Bill) Landing (Florida State University): Atmospheric deposition of trace elements and their biogeochemical impact
- Tim Conway (University of South Florida): Iron isotopes
- Taryn Noble (University of Tasmania): Paleoceanography
- Rhiannon Jones (British Antarctic Survey): Sediments as sources and sinks of trace elements
- Zhouling Zhang (GEOMAR): Non-traditional stable isotopes in biogeochemical research
- Lise Artigue (University of Perpignan): Multi-tracer approaches combined with hydrodynamics, modelling, and microbiology
- Thomas Ryan-Keogh (National Oceanography Centre): Conducting nutrient-addition (“bioassay”) experiments at sea
- Mak Saito (Woods Hole Oceanographic Institution): Metals in biology and biochemistry
- Ria Olivier (Antarctic Legacy of South Africa): Science outreach, awareness, and the role of transdisciplinarity in communication
Hands-On Practical Training – To complement the lecture series, participants engaged in practical sessions that exposed them to key tools, datasets, and analytical techniques used in trace metal research. These sessions helped early career scientists understand how their work integrates into the broader international GEOTRACES community, building confidence for future participation in global research initiatives. Training included:
- Data crunching and processing
- Paleoceanographic exercises
- IPCC-style assessment activities
- Integrating complementary oceanographic datasets
- SeaFAST and MC-ICP-MS laboratory techniques
- GoFlo sampling methods
- Autonomous platform technologies
Sincere appreciation to the sponsors of the 4th GEOTRACES Summer School:
- French National Centre for Scientific Research (CNRS)
- French Embassy in South Africa, Lesotho, and Malawi
- Scientific Committee on Oceanic Research (SCOR)
We also acknowledge and thank the following South African partners and supporters, their collective support played a pivotal role in ensuring the success of this global training event.
- Department of Science, Technology and Innovation (DSTI)
- National Research Foundation (NRF)
- Department of Forestry, Fisheries and the Environment (DFFE)
- South African National Antarctic Programme (SANAP)
- Stellenbosch University (SUN)
- Sea Technology Services (STS)
- Antarctic Legacy of South Africa (ALSA)
Strengthening the Future of Trace Metal and Antarctic Research – The 4th GEOTRACES Summer School has once again demonstrated the power of international collaboration in addressing complex marine and climate challenges. By building capacity among early career scientists and connecting them with leading experts, this event helps ensure that the next generation is well equipped to contribute to cutting-edge oceanographic research—both within South Africa and across the world. SANAP is proud to have been part of such an impactful scientific gathering and remains committed to supporting global research that enhances understanding of our oceans and the polar regions.
Fun during Science Communication session with adding fingerprints to an Antarctica Map
