February 2021 - Issue #43
GEOTRACES Science Highlights
Constraining Oceanic Copper Cycling through Artificial Intelligence and Ocean Circulation Inverse Model
Using available observations of dissolved copper, artificial neural networks, and an ocean circulation inverse model, authors calculated a global estimate of the 3-dimensional distribution and cycling of dissolved copper in the ocean.

Particulate rare earth elements distributions, processes and characterisation of nepheloids in the North Atlantic
Lagarde et al. realised the first basin scale section of particulate rare earth elements concentrations across the North Atlantic Ocean.

Isopycnal mixing controls protactinium and thorium distributions in the Pacific Southern Ocean
Pavia and co-workers determined the physical and chemical speciation as well as the vertical distribution of Protactinium-231 and Thorium-230 at 12 stations across the Southern Pacific Antarctic Circumpolar Current...

Time series thorium-230 data reveal scavenging intensification over the last 15 years in the Arctic Ocean
Authors demonstrate that the later hypothesis is likely explaining thorium-230-depletion in intermediate layers of the Amundsen basin.

Special Focus
Read more
Third GEOTRACES Summer School - Postponed!
In light of the COVID-19 pandemic, we regret to announce that the 3rd GEOTRACES Summer School has been postponed to boreal summer 2022 (dates to be announced).
JGR: Oceans is seeking editors with GEOTRACES expertise
JGR-Oceans is looking for additional editors, specifically with GEOTRACES expertise. Deadline for applications is 28 February 2021.
GEOTRACES tribute to Dr. Thomas M. Church
It is with deep sadness that we inform you of the passing of Dr. Thomas M. Church on 11 February 2021 due to complications from COVID-19.
GEOTRACES sessions at ASLO 2021
Submit an abstract before 12 March 2021!
GEOTRACES Session at Goldschmidt 2021
Submit an abstract before 26 February (23:59 CET)!
Congratulations to Ed Urban!
He has been selected Fellow of The Oceanography Society (TOS).
Congratulations to Karen Casciotti!
She will receive the 2020 John Hayes Award from the Geochemical Society.
GEOTRACES Informations



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

14 April - 24 April 2021, SOTS Process Study (GIpr08), Southern Ocean.

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

Upcoming GEOTRACES or GEOTRACES-related events:

4 March 2021, Fukushima Dai-ichi and the Ocean: 10 years of study and insight, virtual meeting. The registration is open and free to all.

16 June 2021, 2021 European Conference of Aix-Marseille University: Protect our oceans, the challenge of Europe's global leadership, Brussels, Belgium.

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

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

17-23 July 2021Gordon 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

- Browning, T. J., Achterberg, E. P., Engel, A., & Mawji, E. (2021). Manganese co-limitation of phytoplankton growth and major nutrient drawdown in the Southern Ocean. Nature Communications, 12(1), 884. DOI: https://doi.org/10.1038/s41467-021-21122-6

- Cliff, E., Khatiwala, S., & Schmittner, A. (2021). Glacial deep ocean deoxygenation driven by biologically mediated air–sea disequilibrium. Nature Geoscience, 14(1), 43–50. DOI: https://doi.org/10.1038/s41561-020-00667-z

- 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:  https://doi.org/10.1016/J.ATMOSENV.2020.117973

- Meyer, A. C. S., Grundle, D., & Cullen, J. T. (2021). Selective uptake of rare earth elements in marine systems as an indicator of and control on aerobic bacterial methanotrophy. Earth and Planetary Science Letters, 558, 116756. DOI: https://doi.org/10.1016/J.EPSL.2021.116756

- Pinedo-González, P., Anderson, R. F., Vivancos, S. M., Pavia, F. J., & Fleisher, M. Q. (2021). A new method to extract 232Th, 230Th and 231Pa from seawater using a bulk-extraction technique with Nobias PA-1 chelating resin. Talanta, 223, 121734. DOI: https://doi.org/10.1016/J.TALANTA.2020.121734

- Twining, B. S., Antipova, O., Chappell, P. D., Cohen, N. R., Jacquot, J. E., Mann, E. L., Marchetti, A., Ohnemus, D. C., Rauschenberg, S.,Tagliabue, A. (2020). Taxonomic and nutrient controls on phytoplankton iron quotas in the ocean. Limnology and Oceanography Letters, lol2.10179. DOI: https://doi.org/10.1002/lol2.10179

- Zhao, M., Tarhan, L. G., Zhang, Y., Hood, A., Asael, D., Reid, R. P., & Planavsky, N. J. (2021). Evaluation of shallow-water carbonates as a seawater zinc isotope archive. Earth and Planetary Science Letters, 553, 116599. DOI: https://doi.org/10.1016/J.EPSL.2020.116599

Access the GEOTRACES Publication Database

GEOTRACES in Numbers

Cruises completed: 121
Section cruises completed: 43
Publications: 1573

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Image: The research vessel Marion Dufresne in the often difficult sailing conditions as here in the Roaring Forties. © Fred PLANCHON / UBO-LEMAR