GEOTRACES Science Highlights
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– Gulf stream eddies are fertilizing the Western Atlantic Ocean
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Tim Conway and co-authors show that Gulf Steam eddies can provide an extra supply of iron and nutrients such as phosphate and nitrate to the iron-starved Western Atlantic Ocean. Gulf stream eddies form when the northward fast-flowing Gulf Stream meanders and pinches off coastal water, spinning these ‘rings’ out into the ocean…
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– A new model for protactinium/thorium couple in the Atlantic ocean
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An ocean model of the natural radioactive isotopes thorium-230 and protactinium-231 is presented. They are compared with many concentration measurements, both dissolved and particulate; most are from GEOTRACES transects in the Atlantic and the Southern Oceans…
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– Has the role of atmospheric dust as a control on productivity in oligotrophic regions been overestimated?
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Dust particles settling into the surface of open ocean environments are for years assumed to provide nutrients to these distant nutrient-limited areas. Torfstein and Kienast present a unique high-resolution coupling between dust concentrations and chlorophyll-a concentrations which seriously questions this hypothesis…
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– When hydrothermal iron fertilizes the surface ocean in the Western Tropical South Pacific Ocean
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For the first time, iron measurements in the Western Tropical South Pacific reveal that shallow hydrothermal inputs from the Tonga Arc region fertilize the euphotic waters of this vast region. These results shed new light on the functioning of pelagic ecosystems in this region…
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– Contrasting fates of the cadmium-cadmium isotopes in the Kuroshio and Oyashio environmental systems
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Yang and co-authors studied the relative importance of physical and biogeochemical processes on controlling the isotopic composition of dissolved and particulate cadmium along a transect in the Pacific Ocean…
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– Coupling and decoupling of barium and radium-226 in the North Atlantic Ocean
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Because radium-226 and barium are both alkaline earth metals and thus display similar chemical behaviours, studying their fate in contrasting environments is of prime interest. With this aim, Le Roy and co-workers realised a high resolution description of the distribution of these tracers along a transect in the North Atlantic Ocean…
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GEOTRACES News
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– Guide to GEOTRACES Cruise Chief Scientists
A flow chart to guide cruise leaders who wish to develop a research programme to be designated as a GEOTRACES cruise or compliant data is now available on the GEOTRACES web site.
Please click here to access the guide.
– GEOTRACES Scientific Steering Commitee Meeting and Workshop held in Taipei
The 2018 GEOTRACES Scientific Steering Committee (SSC) meeting was held from 23rd to 25th July 2018 at Academia Sinica in Taipei hosted by Prof. Tung-Yuan Ho. The meeting was followed by a 1-day GEOTRACES training workshop who was attended by about 60 participants.
The SSC meets once each year to review the progress in the programme implementation and define the future programme agenda. A major topic for discussion this year was how to streamline the process of building the next GEOTRACES Intermediate Data Product…
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Acknowledgment: Thank you to Prof. Tung-Yuan Ho, Wan-Chen Hsieh, Daniel Liao, Vivian Cheng, Sing-How Tuo, Oliver Hsieh, Jenny Tu, Irene Rodriguez, Damo Karri and Ian Wu for the wonderful hospitality and support provided in organising the SSC meeting. GEOTRACES also gratefully acknowledge funding from the following Taiwanese agencies: Ministry of Science and Technology, Ocean Affairs Council, and Research Center of Environmental Changes at Academia Sinica.
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Pictures: (Left) 2018 GEOTRACES Scientific Steering Committee members and officers, (Right) GEOTRACES-Taiwan Training Workshop participants. Click on the pictures to view them larger.
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GEOTRACES in Numbers
| » Cruises completed: |
106 |
» Section cruises completed:
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38 |
» Peer-reviewed papers:
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975
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GEOTRACES Dates
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– Cruises:
11 September 2018 – 8 October 2018, EAC process study (GPpr13), Southern extension of the East Australian Current (EAC).
18 September 2018 – 24 November 2018, GEOTRACES Section Cruise (GP15), Kodiak (Alaska) to Papeete (Tahiti).
– Forthcoming GEOTRACES and GEOTRACES related Workshops:
3 – 5 December 2018, GEOTRACES-PAGES Synthesis workshop: Trace Element and Isotope Proxies in Paleoceanography, Aix-Marseille, France. Registration is now closed.
11 – 13 February 2019, 7th Kaplan Symposium: Tracers in the Sea, Eilat, Israel.
– Forthcoming GEOTRACES meetings:
9 – 11 September 2019, GEOTRACES Scientific Steering Committee, Hobart, Tasmania.
– Forthcoming GEOTRACES Special Sessions:
6 – 9 January 2019, Fourth Xiamen Symposium on Marine Environmental Sciences (XMAS), Xiamen, China.
23 February – 2 March 2019, ASLO 2019, Aquatic Sciences Meeting, San Juan, Puerto Rico.
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Access the GEOTRACES Calendar
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To Managers and Policy Makers:
We call your attention to the following publication which warns about the risk of monitoring trace metals in surface marine waters in Europe with anappropriate sampling systems and urges better collaboration within the monitoring authorities and the scientific community:
Tovar-Sánchez, A., Buonocore, C., Roque, D., & Blasco, J. (2018). Metals in the European Marine Strategies Legislation: A Challenge for the Managers and Decision-Makers. Environmental Science & Technology, 52(14), 7601–7603: http://doi.org/10.1021/acs.est.8b02906
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Latest Publications
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– Goring-Harford, H. J., Klar, J. K., Pearce, C. R., Connelly, D. P., Achterberg, E. P., & James, R. H. (2018). Behaviour of chromium isotopes in the eastern sub-tropical Atlantic Oxygen Minimum Zone. Geochimica et Cosmochimica Acta, 236, 41–59. DOI: 10.1016/j.gca.2018.03.004
– Guinoiseau, D., Galer, S. J. G., & Abouchami, W. (2018). Effect of cadmium sulphide precipitation on the partitioning of Cd isotopes: Implications for the oceanic Cd cycle. Earth and Planetary Science Letters, 498, 300–308. DOI 10.1016/J.EPSL.2018.06.039
– Hopwood, M. J., Carroll, D., Browning, T. J., Meire, L., Mortensen, J., Krisch, S., & Achterberg, E. P. (2018). Non-linear response of summertime marine productivity to increased meltwater discharge around Greenland. Nature Communications, 9(1), 3256. DOI: 10.1038/s41467-018-05488-8
– Little, S. H., Archer, C., Milne, A., Schlosser, C., Achterberg, E. P., Lohan, M. C., & Vance, D. (2018). Paired dissolved and particulate phase Cu isotope distributions in the South Atlantic. Chemical. Geology. DOI: 10.1016/J.CHEMGEO.2018.07.022
– Ng, H. C., Robinson, L. F., McManus, J. F., Mohamed, K. J., Jacobel, A. W., Ivanovic, R. F., Gregoire, L. J., Chen, T. (2018). Coherent deglacial changes in western Atlantic Ocean circulation. Nature Communications, 9(1), 2947. DOI: 10.1038/s41467-018-05312-3
– Pham, A. L. D., & Ito, T. (2018). Formation and Maintenance of the GEOTRACES Subsurface-Dissolved Iron Maxima in an Ocean Biogeochemistry Model. Global Biogeochemical Cycles, 32(6), 932–953. DOI: 10.1029/2017GB005852
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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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