GEOTRACES Science Highlights
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– Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean
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Understanding persistent high levels of mercury in arctic biota has been an elusive goal for nearly two decades. Little is known about where exactly inorganic Hg inputs into the Arctic generate the toxic methylmercury (MeHg) form that bioaccumulates in biota….
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– Submarine Groundwater Discharge as a major source of nutrients in the Mediterranean Sea
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The authors are proposing a radium-228 isotope mass balance for the upper Mediterranean Sea to estimate the magnitude of Submarine Groundwater Discharge to this basin. Radium isotopes have been widely used as tracers of SGD, mainly because they are enriched in coastal groundwater relative to seawater and behave conservatively once released to the ocean….
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– Thorium and protactinium radionuclides reveal marine particles processes
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Thanks to the compilation of thorium-230 and protactinium-231 data obtained along north-south and east-west transoceanic sections in the Atlantic and Pacific Oceans, Hayes and co-workers enlighten the processes at play among the lifestyles of marine particles, namely the adsorption to particles of these tracers….
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– Two GEOTRACES works question the present ocean chemical elements budgets
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New revelations on the land-ocean flux of chemical elements are presented in two different papers highlighting the value of the ocean isotopic data. Both works reveal that the present quantification of the oceanic cycle of the chemical elements need to be revisited…a big question to dig in!
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– Insights into Particle Cycling from Thorium and Particle Data
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Phoebe Lam and Olivier Marchal propose to describe, with the same model, the dynamics of particles in the oceanic water column and its effects –on four different tracers characterized by very distinct sources and sinks…
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GEOTRACES News
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– Two GEOTRACES Special Issues published!
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We invite you to read the Deep Sea Research Part II special issue dedicated to the results of the US North Atlantic GEOTRACES section cruise GA03 and the Progress in Oceanography special issue dedicated to the GEOTRACES Synthesis and Modeling:
 Deep Sea Research Part II: Topical Studies in Oceanography
Volume 116, Pages 1-342, June 2015
GEOTRACES GA-03 – The U.S. GEOTRACES North Atlantic Transect
Edited by Edward A. Boyle, Robert F. Anderson, Gregory A. Cutter, Rana Fine, William J. Jenkins and Mak Saito
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– Intermediate Data Product 2014 version 2 and DOI – Available!
The corrected and updated of the GEOTRACES Intermediate Data Product 2014 (IDP2014) is now available. The new version (version 2) of the digital data is now available in four formats (ASCII, Excel, netCDF, and ODV) from www.bodc.ac.uk/geotraces/data/idp2014/. For further details on the revisions made please click here.
The IDP2014 should also be cited in the following way:
Mawji, E., et al., The GEOTRACES Intermediate Data Product 2014, Mar. Chem. (2015), http://dx.doi.org/10.1016/j.marchem.2015.04.005.
This citation text is included in the new download agreement document available here.
– GEOTRACES Brazil Workshop – Final Statement Available!
The Final Statement resulting from the GEOTRACES Brazil Workshop (21-22 March, 2015, Santos, Brazil) is now available on the GEOTRACES site. Please click here to download it.
… coming soon… new GEOTRACES website layout…
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GEOTRACES in Numbers
| » Cruises completed: |
52 |
» Section cruises completed:
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24 |
» Stations completed:
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747
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» Peer-reviewed papers:
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508
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GEOTRACES Dates
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– Cruises:
10 July – 2 August 2015, Shelf Seas – Process Study, Celtic Sea.
10 July 2015 – 20 August 2015, Canadian Arctic section cruise (GN02), Arctic.
7 August 2015 – 10 October 2015, US Arctic section cruise (GN01), Arctic.
16 August 2015 – 15 October 2015, German Arctic section cruise (GN04), Arctic.
– Forthcoming GEOTRACES Meetings:
13 – 14 July 2015, GEOTRACES Data Management Committee Meeting,
Vancouver, Canada.
15 – 17 July 2015, GEOTRACES Scientific Steering Committee, Vancouver, Canada.
– Forthcoming GEOTRACES Special Sessions:
14 – 19 June 2015, 12th International Conference on Mercury as a Global Pollutant, Jeju, Korea.
16 – 21 August 2015, Goldschmidt 2015, Prague, Czech Republic.
– Other relevant events:
26 – 30 June 2015, IUGG General Assembly 2015 – IAPSO Symposium , Prague, Czeck Republic.
26 – 31 July 2015, 2015 Gordon Research Conference (GRC) on Chemical Oceanography, Holderness School, Holderness, NH, USA.
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| Access the GEOTRACES Calendar |
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Latest Publications
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– Heimbürger, L.-E., Sonke, J. E., Cossa, D., Point, D., Lagane, C., Laffont, L., Galfond, B.T., Nicolaus, M., Rabe, B., van der Loeff, M. R. (2015). Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. Sci. Rep., 5. doi: 10.1038/srep10318.
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– Heller, M. I., & Croot, P. L. (2015). Copper speciation and distribution in the Atlantic sector of the Southern Ocean. Marine Chemistry, 173, 253–268. doi:10.1016/j.marchem.2014.09.017.
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– Gurganus, S. C., Wozniak, A. S., & Hatcher, P. G. (2015). Molecular characteristics of the water soluble organic matter in size-fractionated aerosols collected over the North Atlantic Ocean. Marine Chemistry, 170, 37–48. doi:10.1016/j.marchem.2015.01.007.
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– Poehle, S., Schmidt, K., & Koschinsky, A. (2015). Determination of Ti, Zr, Nb, V, W and Mo in seawater by a new online-preconcentration method and subsequent ICP–MS analysis. Deep Sea Research Part I: Oceanographic Research Papers, 98, 83–93. doi: 10.1016/j.dsr.2014.11.014.
– Anderson, R. F., & Hayes, C. T. (2015). Characterizing marine particles and their impact on biogeochemical cycles in the GEOTRACES program. Progress in Oceanography, 133, 1–5. doi:10.1016/j.pocean.2014.11.010 .
– Boyle, E. A., Anderson, R. F., Cutter, G. A., Fine, R., Jenkins, W. J., & Saito, M. (2015). Introduction to the U.S. GEOTRACES North Atlantic Transect (GA-03): USGT10 and USGT11 cruises. Deep Sea Research Part II: Topical Studies in Oceanography, 116, 1–5. doi:10.1016/j.dsr2.2015.02.031.
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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, 2014. |
