GEOTRACES Science Highlights
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– A new method to measure lead isotopes in the ocean with an outstanding precision
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A new method for the determination of seawater lead (Pb) isotope compositions and concentrations was developed, which combines and optimizes previously published protocols for the separation and isotopic analysis of this element…
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– How to constrain the biogeochemical cycle of cobalt in the surface Western Atlantic Ocean?
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Cobalt (Co) is an important micronutrient for many species living in the surface waters (bacteria, cyanobacteria, different types of phytoplancton…). Interestingly, the Co requirements vary between the different species and these variations are influencing the dissolved Co distribution in the surface waters…
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– New neodymium data in the North East Atlantic Ocean allow progressing on the behaviour of this geochemical tracer
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High-resolution vertical profiles of neodymium (Nd) concentrations and isotopic compositions were measured at the eastern part of the US GEOTRACES North Atlantic Zonal Transect (GA03, Gulf of Cadiz – Mauritanian Shelf – Cape Verde Islands). This allowed documenting impacts of different environmental settling on the tracer’s behaviours…
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– What drives the silicon budget in the Bay of Bengal? The isotope composition clues…
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The first data set of dissolved silicon isotope composition (δ30Si) along with concentrations (DSi) in seawater of the northern Indian Ocean is presented from the Bay of Bengal region. Elevated Si (>3 µmol/kg) in surface waters of coastal stations indicates the continental supply…
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– How iron isotopes offer a new window on the oceanic biogeochemical cycling of iron
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Two process studies (2008 and 2012) designed to study temporal changes in the biogeochemical cycling of iron (Fe), provide in situ results for dissolved and particulate Fe cycling during the annual spring bloom…
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GEOTRACES News
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– Coming soon… GEOTRACES Webinar series!
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A 4-part webinar series presenting GEOTRACES research will begin on April 30th!
It will feature presentations by ten GEOTRACES scientists studying ocean processes in three major areas – the open ocean, the shelf and near shore, and at hydrothermal vents. The presenters are: Ben Twining, Phoebe Lam, Kristen Buck, Kathy Barbeau, Claire Parker, Carl Lamborg, Dan Ohnemus, Brandy Toner and Jess Fitzsimmons.
The webinar series is organized by Ben Twining and hosted by the COSEE-OS office at University of Maine. All that is needed to participate is a phone and an internet connection. Participants can ask questions and participate, making the session both interactive and informative. Register now!
GEOTRACES Webinar Series Information (detailed programme available soon): http://cosee.umaine.edu/programs/webinars/geotraces/
GEOTRACES Webinar Series Registration:
https://www.surveymonkey.com/s/geotraces
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*Erratum: The GEOTRACES IPO has detected a malfunction on Mendeley’s Desktop publications counter that created double counting of publications. As a result, the correct number of GEOTRACES publications is slightly minor than announced in the previous issue (498).
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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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471*
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GEOTRACES Dates
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– Cruises:
1 – 30 April 2015 and 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:
7 – 11 April 2015, SCOR WG 139 Open Workshop and Symposium on Organic Ligands in the Ocean, Sibenik, Croatia.
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| Access the GEOTRACES Calendar |
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Latest Publications
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– Lam, P. J., & Marchal, O. (2015). Insights into Particle Cycling from Thorium and Particle Data. Annual Review of Marine Science, 7, 159–184. doi: 10.1146/annurev-marine-010814-015623.
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– Minami, T., Konagaya, W., Zheng, L., Takano, S., Sasaki, M., Murata, R., Nakaguchi, Y., Sohrin, Y (2015). An off-line automated preconcentration system with ethylenediaminetriacetate chelating resin for the determination of trace metals in seawater by high-resolution inductively coupled plasma mass spectrometry. Analytica Chimica Acta, 854, 183–90. doi:10.1016/j.aca.2014.11.016.
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– Jeandel, C., & Oelkers, E. H. (2015). The influence of terrigenous particulate material dissolution on ocean chemistry and global element cycles. Chemical Geology, 395, 50–66. doi:10.1016/j.chemgeo.2014.12.001.
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– Sanial, V., van Beek, P., Lansard, B., Souhaut, M., Kestenare, E., D’Ovidio, F., & Blain, S. (2015). Use of Ra isotopes to deduce rapid transfer of sediment-derived inputs off Kerguelen. Biogeosciences Discussions, 12, 1415–1430. doi: 10.5194/bg-12-1415-2015.
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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. |
