GEOTRACES Science Highlights
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– Dissolved iron sources in the North Atlantic Ocean quantified
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The relative importance of four different dissolved iron (Fe) sources in the North Atlantic Ocean have been precisely determined for the first time thanks to GEOTRACES in a work published in Nature. Using a novel method based on the stable isotopic composition of dissolved Fe, Conway and John have “fingerprinted” different sources of Fe along a section in the North Atlantic Ocean…
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– The distribution of dissolved iron in the West Atlantic Ocean
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Iron (Fe) is an essential trace element for marine life. Extremely low Fe concentrations limit primary production and nitrogen fixation in large parts of the oceans and consequently influence ocean ecosystem functioning. Rijkenberg and co-authors present dissolved Fe values measured at an unprecedented high intensity…
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– The impact of the different sources of iron on the ability of the ocean to absorb atmospheric carbon dioxide: reversing the paradigm?
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Using model simulations, Tagliabue and co-authors tested the sensitivity of the ocean to absorb the atmospheric carbon dioxide (CO2) in response to variable supply of iron. They found that while atmospheric CO2 is sensitive to sedimentary iron input, it is relatively insensitive to dust and hydrothermal iron input…
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– Undocumented cadmium, zinc and copper sink in oxygen minimum zones
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Cadmium (Cd) is a micronutrient for marine algae and has a marine distribution similar to the macronutrients nitrate and phosphate. The use of sedimentary microfossil records of Cd, thus, allow reconstructions of past ocean nutrient distributions that facilitate the understanding of the role of the oceans in the carbon cycle and climate change…
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– Impact of volcanic ash on marine algae and the global carbon cycle
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Volcanic ash fertilization of iron-limited phytoplankton in remote marine waters has been suggested to perturb global biogeochemical cycles and climate. For example, ash from the Pinatubo (Philippines) eruption in 1991 was suggested to have fertilized vast areas of the iron-limited Southern Ocean – potentially causing the drawdown in atmospheric carbon dioxide observed subsequently…
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GEOTRACES News
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– Successful GEOTRACES Intermediate Data Product presentation at Goldschmidt 2014
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A successful presentation of the GEOTRACES Intermediate Data Product 2014 was held at Goldschmidt 2014 (Sacramento, California, U.S.) on 10th June 2014. The event was included in the Goldschmidt 2014 student events programme which gave GEOTRACES a very valuable opportunity to introduce the programme and the intermediate data product to students and early career scientists.
Thanks to Adina Paytan and Goldschmidt 2014 organisation to invite GEOTRACES to participate in the conference!
Picture: GEOTRACES Intermediate Data Product 2014 Town Hall at Goldschmidt 2014.
Click here to view more pictures of the event. Pictures courtesy of Edoardo Ammannati.
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GEOTRACES in Numbers
| » Cruises completed: |
51 |
» Section cruises completed:
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23 |
» Stations completed:
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732
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GEOTRACES Dates
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– Forthcoming GEOTRACES Meetings:
6 – 7 October 2014, GEOTRACES Data Management Committee Meeting,
Stellenbosch, Cape Town, South Africa.
8 – 10 October 2014, GEOTRACES Scientific Steering Committee, Stellenbosch, Cape Town, South Africa.
– Forthcoming GEOTRACES Special Sessions:
28 July – 1 August 2014, AOGS 2014, Asia Oceania Geosciences Society Annual Meeting, Sapporo, Hokkaido, Japan.
27 – 31 October 2014, 24th Earth Sciences meeting, Pau, France.
15 – 19 December 2014, American Geophysical Union Fall 2014 Meeting, San Francisco, California, USA.
– Other Relevant Events:
4 – 9 August 2014, IMBER ClimEco4 Summer School, East China Normal University in Shanghai, China.
8 – 11 September 2014, The Challenger Society for Marine Science 2014 Conference, Plymouth University, UK.
5 – 9 October 2014, DISCO and PODS Dissertation Symposiums, Hawaii, USA.
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| Access the GEOTRACES Calendar |
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Latest Publications
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– Conway, T. M., & John, S. G. (2014). Quantification of dissolved iron sources to the North Atlantic Ocean. Nature, 511(7508), 212–215. doi:10.1038/nature13482.
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– Van Hulten, M. M. P., Sterl, A., Middag, R., de Baar, H. J. W., Gehlen, M., Dutay, J.-C., & Tagliabue, A. (2014). On the effects of circulation, sediment resuspension and biological incorporation by diatoms in an ocean model of aluminium. Biogeosciences, 11(14), 3757–3779. doi:10.5194/bg-11-3757-2014.
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– Fitzsimmons, Jessica N. Boyle, E. A. (2014). Assessment and comparison of Anopore and cross flow filtration methods for the determination of dissolved iron size fractionation into soluble and colloidal phases in seawater. Limnology and Oceanography-Methods, 12, 246–263. doi:10.4319/lom.2014.12.246.
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– Hassler, C. S., Ridgway, K. R., Bowie, A. R., Butler, E. C. V., Clementson, L. A., Doblin, M. A., Davies, D. M., Law, C., Ralph, P. J., van der Merwe, P., Watson, R. Ellwood, M. J. (2014). Primary productivity induced by iron and nitrogen in the Tasman Sea: an overview of the PINTS expedition. Marine and Freshwater Research, 65(6), 517. doi:10.1071/MF13137.
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– Lee, H. M., Hong, G. H., Baskaran, M., Kim, S. H., & Kim, Y. I. (2014). Evaluation of plating conditions for the recovery of (210)Po on a Ag planchet. Applied Radiation and Isotopes: Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine, 90, 170–6. doi:10.1016/j.apradiso.2014.03.025.
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– Sanial, V., van Beek, P., Lansard, B., D’Ovidio, F., Kestenare, E., Souhaut, M., Zhou, M., Blain, S. (2014). Study of the phytoplankton plume dynamics off the Crozet Islands (Southern Ocean): A geochemical-physical coupled approach. Journal of Geophysical Research: Oceans, 119(4), 2227–2237. doi:10.1002/2013JC009305.
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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. |
