scor

FacebookTwitter

Measurements of radium-228 (228Ra) in the framework of the 2015 U.S. GEOTRACES Arctic Transect (GN01), revealed that the surface water content of this tracer has almost doubled over the last decade, specifically in the Transpolar Drift near the North Pole.

Radium isotopes are excellent tracers of land-ocean inputs. A mass balance model for 228Ra allowed Kipp and co-workers (2018, see reference below) to suggest that this increase is due to an intensification of shelf-derived material inputs to the central basin. These coastal changes, in turn, could also be delivering more nutrients, carbon, and other chemicals into the Arctic Ocean and lead to dramatic impacts on Arctic food webs and animal populations.

18 Kipp

Figure: Diminishing sea ice near the Arctic coast leaves more open water near the coast for winds to create waves. The increased wave action reaches down and stirs up sediments on shallow continental shelves, releasing radium and other chemicals that are carried up to the surface and swept away into the open ocean by currents such as the Transpolar Drift. Artwork: Natalie Renier, Woods Hole Oceanographic Institution. Please click here to view the figure larger.

Reference:

Kipp, L. E., Charette, M. A., Moore, W. S., Henderson, P. B., & Rigor, I. G. (2018). Increased fluxes of shelf-derived materials to the central Arctic Ocean. Science Advances, 4(1), eaao1302. DOI: http://doi.org/10.1126/sciadv.aao1302

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.