GEOTRACES Science Highlights
|
– GEOTRACES: Get the right data!
 |
Measuring concentrations of many constituents at the nano- to picomolar levels in seawater is a difficult challenge, requiring thorough intercalibration between the different laboratories participating to the same programme. GEOTRACES is but one example of a programme that has intercalibration as an essential component of its field-based efforts…
|
Read More |
|
– Slow-spreading ridges could be major oceanic iron contributor
 |
A large dissolved iron- and manganese-rich plume has been detected by Saito and co-authors over the slow-spreading southern Mid-Atlantic Ridge. This discovery calls into question the assumption that deep-sea hydrothermal vents along slow-spreading ridges were negligible contributors to the oceanic iron inventory…
|
Read More |
|
– Dissolved iron in the tropical North Atlantic Ocean
|
Surprisingly high dissolved iron (dFe) values have been found in the subsurface oxygen minimum waters of the tropical North Atlantic from the Cape Verde Islands west to 42°W, reaching concentrations of 1.0-1.5 nmol/kg. Fitzsimmons’ and co-authors results suggest that biological regeneration is a more consistent explanation for this enrichment…
|
Read More |
|
– Large amounts of soluble manganese(III) identified at the land-ocean interface
 |
Soluble manganese(III) [Mn(III)] is a phase traditionally considered non important in aqueous redox reactions. However, applying a spectrophotometric method sensitive to Mn oxidation state, Madison and co-authors found that up 90% of the Mn in porewater collected from sediment cores in the St. Lawrence Estuary is soluble Mn(III)….
|
Read More |
|
– Results from the first US-GEOTRACES cruise in the North Atlantic
 |
Results from the first US-GEOTRACES cruise in the North Atlantic are coming out! Andrew Wozniak and co-authors show that aerosols from European-influenced air masses (combustion influenced) have higher relative iron (Fe) and aluminium (Al) solubilities, higher Water Soluble Organic Carbon (WSOC)/trace metal ratios, and distinct organic matter (OM) chemical characteristics…
|
Read More |
|
– First combined distributions of dissolved Neodymium (Nd) – Hafnium (Hf) concentrations and isotope compositions from the Baltic Sea
 |
The central Baltic Sea is a marginal brackish basin, in which anoxic bottom waters prevail either seasonally or permanently and which is surrounded by continental landmasses comprising a large variety of compositions and ages of rocks. This allows the investigation of water mass mixing using radiogenic isotope compositions of Nd and Hf…
|
Read More |
|
|
GEOTRACES News
|
– Report from GEOTRACES Scientific Steering Committee Meeting
|
The annual meeting of the GEOTRACES Scientific Steering Committee was held in Bremerhaven (Germany) in October 2-4, 2013. Immediately before this meeting, a joint meeting of the Data Management Committee and the Standards & Intercalibration Committee was also held. The definition of the 2014 GEOTRACES Intermediate Data Product (IDP) was the main focus of these meetings.
The 2014 IDP will consist on a public on-line database (under registration) and a set of visual components (on-line interactive maps and a selection of 3D animations of GEOTRACES sections). More information will be available soon…
|
|
|
|
|
GEOTRACES in Numbers
» Cruises completed: 49 |
» Section cruises completed: 21 |
» Stations completed: 618 |
|
|
GEOTRACES Dates
– Cruises:
25 October – 22 December 2013, Section cruise GP16, Eastern tropical Pacific.
– Forthcoming GEOTRACES Meetings:
8-9 January 2014, UK GEOTRACES GA10 cruise Data Synthesis meeting, University of Oxford, UK.
– Forthcoming GEOTRACES Special Sessions:
23 – 28 February 2014, Ocean Science Meeting 2014, Honolulu, Hawaii, USA.
1-6 June 2014, International Conference on Atmospheric Dust, Castellaneta Marina, Italy.
8 – 13 June 2014, Goldschmidt 2014, Sacramento, California, USA.
– Other Relevant Events:
25-28 November 2013, SCOR Executive Committee Meeting, Royal Society of New Zealand, Wellington, New Zealand.
4-6 December 2013, PMIP Ocean Workshop 2013, Corvallis, Oregon, USA.
9-13 December 2013, American Geophysical Union Fall 2013 Meeting, San Francisco, California, USA.
|
Access the GEOTRACES Calendar |
|
|
Latest Publications
|
– Bradley Moran, Henrieta Dulaiova, J.Z. Du, W.S. Moore, H.F. Hsh, G.Z. Wang, Jan Scholten, P. Henderson, W. Men, R. Rengarajan, Z.J. Sha, J.J. Jiao (2013), Inter-comparison of radium analysis in coastal sea water of the Asian region, Marine Chemistry, Volume: 156, p. 138-145 DOI: 10.1016/j.marchem.2013.04.008
|
|
– Marilaure Grégoire, Bob Anderson, Bruno Delille, Catherine Jeandel, Sabrina Speich (2013), Tracers of physical and biogeochemical processes, past changes and ongoing anthropogenic impacts: The 43rd International Liege Colloquium on Ocean Dynamics, Liege, Belgium, May 2–6, 2011, Journal of Marine Systems, Volume: 126, p. 1-2 DOI: 10.10.1016/j.jmarsys.2013.04.012
|
|
– M.M.P. van Hulten, A. Sterl, A. Tagliabue, J.-C. Dutay, M. Gehlen, H.J.W. de Baar, R. Middag (2013), Aluminium in an ocean general circulation model compared with the West Atlantic Geotraces cruises, Journal of Marine Systems, Volume: 126, p. 3-23 DOI: 10.1016/j.jmarsys.2012.05.005
|
– Ricardo Prego, Juan Santos-Echeandía, Patricia Bernárdez, Antonio Cobelo-García, Manuel Varela (2013), Trace metals in the NE Atlantic coastal zone of Finisterre (Iberian Peninsula): Terrestrial and marine sources and rates of sedimentation, Journal of Marine Systems, Volume: 155, p. 69-81 DOI: 10.1016/j.jmarsys.2012.05.008
|
|
– M.E. Lagerström, M.P. Field, M. Séguret, L. Fischer, S. Hann, R.M. Sherrell (2013), Automated on-line flow-injection ICP-MS determination of trace metals (Mn, Fe, Co, Ni, Cu and Zn) in open ocean seawater: Application to the GEOTRACES program, Marine Chemistry, Volume: 155, p. 71-80 DOI: 10.1016/j.marchem.2013.06.001
|
|
Acces the GEOTRACES Database |

|
|
|