GEOTRACES Science Highlights
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– A new application of aerosol iron isotopes: tracing anthropogenic iron; an example of the North Atlantic Ocean
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Conway and co-authors present the first evidence that anthropogenic iron from combustion sources is visible at the basin scale. Using iron isotopic composition analysis of the soluble aerosol phases collected during GEOTRACES cruise GA03 in the North Atlantic Ocean…
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– The causes of the 90-ppm glacial atmospheric CO2 drawdown still strongly debated
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Using an observationally constrained earth system model, Khatiwala and co-workers compare different processes that could lead to the 90-ppm glacial atmospheric CO2 drawdown, with an important improvement on the deep carbon storage quantification (i.e. Biological Carbon Pump efficiency)…
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–Upwelled hydrothermal iron stimulates massive phytoplankton blooms in the Southern Ocean
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Ardyna and co-authores combined observations of profiling floats with historical trace element data and satellite altimetry and ocean color data from the Southern Ocean to reveal that dissolved iron of hydrothermal origin can be upwelled to the surface…
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– Glacial erosion processes suspected to enhance the lability of particulate iron, with a strong influence on the biological demand in the subantarctic waters
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As part of the GEOTRACES process study HEOBI (GIpr05) van der Merwe and co-workers conducted a thorough characterization of the labile and refractory iron phases of the particles discharged to the local seawater by the glacial erosion and rivers of Heard and Mc Donald islands in the Southern Indian Ocean….
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GEOTRACES News
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– 2019 GEOTRACES Scientific Steering Committee Meeting held in Australia
SSC members reviewed the progress in the programme implementation and defined the future programme agenda. The major topics for discussion were the review of the new on-line portal to register data to be included in future GEOTRACES Intermediate Data Products (IDP) and the timeline for the release of the forthcoming IDP2021.
Remain alert as the IDP portal and timeline will be presented to the GEOTRACES community very soon!
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– Recommendations for nations developing a trace metal-clean sampling system
An extremely useful resource for nations developing trace metal-clean sampling systems is now available on the GEOTRACES web site!
Based on 11 years of experience, Greg Cutter, GEOTRACES Standards and Intercalibration past co-chair, has summarised the recommendations that nations developing a trace metal-clean sample system need to consider for successful sampling…
The document is available here.
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– GEOTRACES Brochure – Updated!
An updated GEOTRACES Brochure is now available to download from the GEOTRACES web site. The text of the brochure has been revised to include the GEOTRACES accomplishments to date and very particularly the GEOTRACES Intermediate Data Products.
You can download a pdf version of the brochure here. Printed copies are available upon request (ipo@geotraces.org).
– GEOTRACES Statement of Values and Behaviours
Following endorsement at the recent Scientific Steering Committee meeting in Hobart (Australia), GEOTRACES has released a Statement of Values and Behaviours which reflects our common understanding of respectful values, acceptable behaviour, and cooperative interaction as an international scientific programme.
It is available to download here.
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– Featured Best Practice –
Register your analytical skills in the GEOTRACES database here.
>> To contribute to networking.
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GEOTRACES in Numbers
» Cruises completed: |
116 |
» Section cruises completed:
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41 |
» Peer-reviewed papers:
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1289 |
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GEOTRACES Dates
– Cruises:
31 October – 6 December 2019, GEOTRACES TONGA Process Study (GPpr14), Western Tropical South Pacific.
14 – 20 November 2019, BAIT-4 Process Study (GApr13), North Atlantic Ocean (Sargasso Sea).
2 February – 8 March 2020, PROVOCCAR Process Study (GApr15), North Antarctic Peninsula.
– GEOTRACES Summer School:
23 – 28 September 2019, 2nd GEOTRACES Summer School, Cadiz, Spain.
– Forthcoming GEOTRACES meetings:
13 – 14 September 2020 (tentative), GEOTRACES Data Management Committee, Santa Cruz, California, USA.
15 – 17 September 2020 (tentative), GEOTRACES Scientific Steering Committee, Santa Cruz, California, USA.
– Forthcoming GEOTRACES Special Sessions:
16 – 20 February 2020, Ocean Sciences 2020, San Diego, California, USA.
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Access the GEOTRACES Calendar
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Flash Info!

The 2nd GEOTRACES Summer School is being held from 23rd to 28th September in Cadiz, Spain, with about 40 participants from all over the world!
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Latest Publications
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– Köbberich, M., & Vance, D. (2019). Zn isotope fractionation during uptake into marine phytoplankton: Implications for oceanic zinc isotopes. Chemical Geology, 523, 154–161. DOI: 10.1016/J.CHEMGEO.2019.04.004
– Pagnone, A., Völker, C., & Ye, Y. (2019). Processes affecting dissolved iron across the Subtropical North Atlantic: a model study. Ocean Dynamics, 69(9), 989–1007. DOI: 10.1007/s10236-019-01288-w
– Roy-Barman, M., Thil, F., Bordier, L., Dapoigny, A., Foliot, L., Ayrault, S., Lacan, F., Jeandel, C., Pradoux, C., Garcia-Solsona, E. (2019). Thorium isotopes in the Southeast Atlantic Ocean: Tracking scavenging during water mass mixing along neutral density surfaces. Deep Sea Research Part I: Oceanographic Research Papers, 149, 103042. DOI: 10.1016/J.DSR.2019.05.002
– Zheng, L., & Sohrin, Y. (2019). Major lithogenic contributions to the distribution and budget of iron in the North Pacific Ocean. Scientific Reports, 9(1), 11652. DOI: 10.1038/s41598-019-48035-1
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Acces the GEOTRACES Database |
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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, 2017.
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