GEOTRACES Science Highlights
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– Why did the concentration of atmospheric carbon dioxide rise so much and so quickly during last deglaciation?
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During the Last Glacial Maximum, the deep southern Pacific waters were stratified, efficiently accumulating old, CO2 rich waters. Basak and co-authors measured neodymium isotopes in sediment cores that clearly show that…
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– Surface South Pacific ecosystems reflect the availability of the nutrients iron, nitrate and phosphate
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Thanks to a high resolution section across the South Pacific, Ellwood and co-workers identify that the gradient of sources and fates of the three nutrients iron, nitrogen, and phosphorus is explaining the observed ecosystem west-east gradient…
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– Astonishing protactinium and thorium profiles in the Mediterranean Sea
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In the framework of the GEOTRACES cruise along the GA04 section in the Meditterranean Sea, Gdaniec and co-workers, measured thorium and protactinium isotope distributions on eight profiles across the Mediterranean Sea. Contrasting with what is observed in the open ocean…
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– Using ICPMS/MS to determine manganese, iron, nickel, copper, zinc, cadmium and lead concentrations on less than 40ml of seawater
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Jackson and co-workers first did a classical offline preconcentration of small seawater aliquots using a SeaFast system. More innovative is the use of a state of the art inductively coupled plasma – tandem mass spectrometry (ICPMS/MS) to analyse the eluate…
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– High production of methylmercury in the anoxic waters of the Black Sea
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As part of the GEOTRACES MedBlack cruise, the research vessel Pelagia occupied 12 full-depth stations in the Black Sea along an East-West transect between July 13th and 25th, 2013. In the permanently anoxic waters of the Black Sea, a high fraction (up to 57%) of total mercury was found to be methylmercury…
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GEOTRACES News
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– GEOTRACES Intermediate Data Product 2017: version 2 available!
An updated and corrected version of the GEOTRACES Intermediate Data Product 2017 was released in February 2018. Download and use it:
Please see IDP2017 v2 changes document for further details on the revisions made.
– New special issue! The U.S. GEOTRACES Eastern Tropical Pacific Transect (GP16)
The special issue in Marine Chemistry focused on the scientific results of the U.S. GEOTRACES Eastern Pacific Zonal Transect (EPZT) cruise along the GEOTRACES GP16 section is now available!
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GEOTRACES in Numbers
» Cruises completed: |
104 |
» Section cruises completed:
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38 |
» Peer-reviewed papers:
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934 |
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GEOTRACES Dates
– Cruises:
19 April 2018 – 21 May 2018, AMAZON-GEOTRACES (GApr11), Amazon Estuary and the associated plume.
18 September 2018 – 24 November 2018, GEOTRACES Section Cruise (GP15), Kodiak (Alaska) to Papeete (Tahiti).
– Forthcoming GEOTRACES Workshops:
12 – 17 May 2018, Training Workshop on Metal Speciation and Isotopes, Xiamen, China.
3 – 5 December 2018, GEOTRACES-PAGES Synthesis workshop: Trace Element and Isotope Proxies in Paleoceanography, Aix-Marseille, France. Pre-register before 1 June 2018!
– Forthcoming GEOTRACES meetings:
5 – 6 May 2018, GEOTRACES-China Cruise Planning Meeting, Xiamen, China.
23 – 25 July 2018, GEOTRACES Scientific Steering Committee, Taipei, Taiwan.
– Forthcoming GEOTRACES Special Sessions:
10 – 15 June 2018, ASLO 2018, Victoria, Canada.
12 – 17 August 2018, Goldschmidt 2018, Boston, USA.
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Access the GEOTRACES Calendar
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Latest Publications
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– Basak, C., Fröllje, H., Lamy, F., Gersonde, R., Benz, V., Anderson, R. F., Molina-Kescher, M., Pahnke, K. (2018). Breakup of last glacial deep stratification in the South Pacific. Science, 359 (6378), 900–904. doi: 10.1126/science.aao2473
– Fischer, L., Smith, G., Hann, S., & Bruland, K. W. (2018). Ultra-trace analysis of silver and platinum in seawater by ICP-SFMS after off-line matrix separation and pre-concentration. Marine Chemistry, 199, 44–52. doi: 10.1016/J.MARCHEM.2018.01.006
– Ho, P., Lee, J.-M., Heller, M. I., Lam, P. J., & Shiller, A. M. (2018). The distribution of dissolved and particulate Mo and V along the U.S. GEOTRACES East Pacific Zonal Transect (GP16): The roles of oxides and biogenic particles in their distributions in the oxygen deficient zone and the hydrothermal plume. Marine Chemistry, 201, 242–255. doi: 10.1016/J.MARCHEM.2017.12.003
– Moffett, J. W., & German, C. R. (2018). The U.S.GEOTRACES Eastern Tropical Pacific Transect (GP16). Marine Chemistry, 201, 1–5. doi: 10.1016/J.MARCHEM.2017.12.001
– Ohnemus, D. C., Lam, P. J., & Twining, B. S. (2018). Optical observation of particles and responses to particle composition in the GEOTRACES GP16 section. Marine Chemistry, 201, 124–136. doi: 10.1016/J.MARCHEM.2017.09.004
– Samanta, S., & Dalai, T. K. (2018). Massive production of heavy metals in the Ganga (Hooghly) River estuary, India: Global importance of solute-particle interaction and enhanced metal fluxes to the oceans. Geochimica et Cosmochimica Acta, 228, 243–258. doi: 10.1016/J.GCA.2018.03.002
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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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