scor

FacebookTwitter

For the first time, iron measurements in the Western Tropical South Pacific reveal that shallow hydrothermal inputs from the Tonga Arc region fertilize the euphotic waters of this vast region. These results shed new light on the functioning of pelagic ecosystems in this region.  Indeed, blooms in this area are dominated by N2-fixing organisms (or diazotrophs), with iron requirements higher than those of non-diazotrophic organisms. The measurements of trace elements along a 4000 km ~ 19 ° S transect during the OUTPACE campaign (https://outpace.mio.univ-amu.fr) together with Argo Float data and  circulation modeling, allowed Guieu and co-authors to establish that the important mesoscale activity of the region makes it possible to transport, disperse and maintain high iron concentrations several hundred kilometers from the source.

 18 Guieu
Figure: Surface Chlorophyll-a concentration (mg m−3) during the 45-day transect of the OUTPACE cruise (A) (The ocean color satellite products are produced by CLS. Figure courtesy of A. De Verneil). (B) Cross-section of dissolved Fe nM (0–500 m). Click here to view the figure larger.

Reference:

Guieu, C., Bonnet, S., Petrenko, A., Menkes, C., Chavagnac, V., Desboeufs, K. Maes, C., Moutin, T. (2018). Iron from a submarine source impacts the productive layer of the Western Tropical South Pacific (WTSP). Scientific Reports, 8(1), 9075. http://doi.org/10.1038/s41598-018-27407-z

Filter by Keyword

Aerosol Inputs Aerosols Aluminium Analysis Anoxia Antarctic Geology Arctic Ocean Arsenic Artificial Intelligence Atlantic Ocean Atmospheric Dynamic Barium Barium Isotopes Behavior Benthic Beryllium BioGEOSCAPES Biological Pump Black Sea Boundary Exchange Boundary Scavenging Budget Cadmium Cadmium Isotopes Cadmium Sulfide Chromium Chronium Isotopes Circulation Climate Change CO2 Degassing Coastal Area Cobalt Copper Copper Isotopes Cycles Data Compilation Deep Water Dissolved Concentrations Distribution Distribution Coefficient Ecosystem Eddy Kinetic Energy Environmental Change Estuaries Experiments Export Fluxes Fate Fertilisation Fractionation Gadolinium Gallium Global Scale Hafnium Hafnium Isotopes Helium Helium Isotopes Hydrothermal Hypoxia Ice ICPMS Indian Ocean Inputs Intercalibration Intercomparison International Polar Year Iodine Iron Iron Isotopes Iron Sulfide Isotopes Land Ocean Inputs Lanthanum Lead Lead Isotopes Limitation Lithogenic Macronutriments Mammals Manganese Mediterranean Sea Mercury Mesopelagic Mesoscale Transport Methylmercury Microbial Micronutriments Modelling Multiple TEIs Neodymium Neodymium Isotopes Nepheloids Nickel Nitrate Nitrogen Nutrients Organic Matter Osmium Oxygen Pacific Ocean Paleoceanography Paleocirculation Particle Fluxes Particles Particulate Organic Carbon Phosphate Phosporus Phytoplankton Pitzer Equations Precipitation Procedure Processes Productivity Protactinium Protocol Proxy Radium Radium Isotopes Rare Earth Elements Red Sea Remineralization Residence Times River SAFE Samples Scandium Scavenging Sea Ice Sediments Shelf Silicon Silicon Isotopes Southern Ocean Speciation Submarine Ground Water Discharge Surface Waters Thorium Thorium Isotopes Thorium-Protactinium Time Series Total Hg Transmissiometer Uranium Uranium Isotopes Yttrium Zinc Zinc Isotopes

 Data Product (IDP2017)

eGEOTRACES Atlas

 Data Assembly Centre (GDAC)

 Outreach

Subscribe Mailing list

Contact us

To get a username and password, please contact the GEOTRACES IPO.

This site uses cookies to offer you a better browsing experience. Find out more on how we use cookies and how you can change your settings.