e-Newsletter November 2018

This timeframe, sometimes called a residence time, ranges from decades for the most reactive trace elements to millions of years for the most unreactive elements such as the major components of sea salt. The residence time is often difficult to constrain…

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Mercury concentrations in Canadian Arctic marine mammals were monitored during the last four decades and found to be highly elevated, frequently exceeding toxicity thresholds…

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Abrupt climate changes in the past have been attributed to variations in Atlantic Meridional Overturning Circulation (AMOC) strength. Knowing the exact timing and magnitude of the AMOC shift is important to understand the driving mechanism of such climate variability…

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Thanks to samples collected as part of the Japanese GEOTRACES cruise in 2009 – 2010, along section GI04, Takahata and co-workers identified a maximum helium-3 ratios value at mid-depth (2000 – 3000 m) in the northern part (north of 30°S) of the central Indian Ocean…

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This verdict is well illustrated by the recent study of Rodrigo Pedreira off the North East Brazilian coast. His Rare Earth Elements (REE) data reveal marked positive Gadolinium (Gd) anomaly which reflects the release of Gd in hospital and domestic effluents…

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A data base of 2412 profiles collected using the Lamont Thorndike nephelometer from 1964 to 1984 is used to globally map turbid nepheloid layers by Gardner and co-workers. The authors compare maps from that period with maps based on data from 6392 profiles measured using transmissometers from 1979 to 2016…

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This is what reveals the first full transarctic section of radium-228 in surface waters measured during Arctic cruises along GEOTRACES transects GN04 and GN01 proposed by Rutgers van der Loeff and colleagues. Radium-228 activities in the central Arctic have increased from 2007 through 2011 to 2015…

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Bourne and co-workers examine the particulate cadmium to phosphorus ratio (Cd/P) variations of 3 particle fractions from 50 casts covering spatial and temporal scales never reached so far for these parameters…

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– Cruises:

15 December 2018 – 7 February 2019,  PS117 HAFOS Process Study (GApr12),  Southern Ocean (Lazarev Sea and Weddell Sea). 

12 March 2019 – 05 April 2019, IN2019_V02 Process Study (GIpr08), Southern Ocean (East Indian Sector).

25 April 2019 – 10 June 2019, KK1902 GEOTRACES Section Cruise (GP09), North West Pacific.

31 October 2019 – 06 December 2019,  GEOTRACES TONGA Process Study (GPpr14), Western Tropical South Pacific.

– 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 closed. 

11 – 13 February 2019, 7th Kaplan Symposium: Tracers in the Sea, Eilat, Israel. 

– Forthcoming GEOTRACES meetings:

6 – 11 December 2018, GEOTRACES Standards & Intercalibration Committee Meeting, Marseille, France. 

7 – 8 September 2019, GEOTRACES Data Management Committee, Hobart, Tasmania.

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.

– Berube, P. M., Biller, S. J., Hackl, T., Hogle, S. L., Satinsky, B. M., Becker, J. W., Braakman, R., Collins, S. B., Kelly, L., Berta-Thompson, J., Coe, A., Bergauer, K., Bouman, H. A., Browning, T. J., De Corte, D., Hassler, C., Hulata, Y., Jacquot, J. E., Maas, E. W., Reinthaler, T., Sintes, E., Yokokawa, T., Lindell, D., Stepanauskas, R., Chisholm, S. W. (2018). Single cell genomes of Prochlorococcus, Synechococcus, and sympatric microbes from diverse marine environments. Scientific Data, 5, 180154. DOI:  10.1038/sdata.2018.154

– Menzel Barraqueta, J.-L., Schlosser, C., Planquette, H., Gourain, A., Cheize, M., Boutorh, J., Shelley, R., Contreira Pereira, L., Gledhill, M., Hopwood, M. J. Lacan, F., Lherminier, P., Sarthou, G., Achterberg, E. P. (2018). Aluminium in the North Atlantic Ocean and the Labrador Sea (GEOTRACES GA01 section): roles of continental inputs and biogenic particle removal. Biogeosciences, 15(16), 5271–5286. DOI: 10.5194/bg-15-5271-2018

– Pitta, E., Zeri, C., Tzortziou, M., & Rijkenberg, M. J. A. (2019). Transformations of dissolved organic matter in the Marmara Sea traced by its optical signature. Journal of Marine Systems, 189, 1–11. DOI:  10.1016/J.JMARSYS.2018.09.001

– Whitby, H., Posacka, A. M., Maldonado, M. T., & van den Berg, C. M. G. (2018). Copper-binding ligands in the NE Pacific. Marine Chemistry, 204, 36–48. DOI: 10.1016/J.MARCHEM.2018.05.008