Recent evolution of 129I levels in the Nordic Seas and the North Atlantic Ocean

Autor: De Soto, F., Giering, S., Sanders, R., García-Tenorio, R., Vivo-Vilches, Carlos, López-Gutiérrez, José María, Periáñez, Raúl, Marcinko, Charlotte, Le Moigne, F., McGinnity, Paul, Peruchena, Juan Ignacio, Villa-Alfageme, María
Přispěvatelé: Universidad de Sevilla. Departamento de física aplicada I, Universidad de Sevilla. Departamento de Física Aplicada II, Universidad de Sevilla. RNM138: Física Nuclear Aplicada, Ministerio de Economía y Competitividad (MINECO). España, Dpto Fisica Atomica, Molecular y Nuclear (DPTO FISICA ATOMICA, MOLECULAR Y NUCLEAR), Universidad de Sevilla, National Oceanography Centre [Southampton] (NOC), University of Southampton, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Universidad de Sevilla / University of Sevilla, Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Ministerio de Economía y Competitividad (España), Vivo-Vilches, C. [0000-0002-4972-4072], López-Gutiérrez, J. M. [0000-0001-8672-8075], Periáñez, R. [0000-0003-2586-3884], Villa-Alfageme, María [0000-0001-7157-8588], Vivo-Vilches, C., López-Gutiérrez, J. M., Periáñez, R., Villa-Alfageme, María
Rok vydání: 2018
Předmět:
Zdroj: idUS. Depósito de Investigación de la Universidad de Sevilla
instname
Science of the Total Environment
Science of the Total Environment, Elsevier, 2018, 621 (11), pp.376-386. ⟨10.1016/j.scitotenv.2017.11.268⟩
Science of the Total Environment, 2018, 621 (11), pp.376-386. ⟨10.1016/j.scitotenv.2017.11.268⟩
Digital.CSIC. Repositorio Institucional del CSIC
ISSN: 0048-9697
1879-1026
DOI: 10.1016/j.scitotenv.2017.11.268
Popis: Most of the anthropogenic radionuclide 129I released to the marine environment from the nuclear fuel reprocessing plants (NFRP) at Sellafield (England) and La Hague (France) is transported to the Arctic Ocean via the North Atlantic Current and the Norwegian Coastal Current. 129I concentrations in seawater provides a powerful and well-established radiotracer technique to provide information about the mechanisms which govern water mass transport in the Nordic Seas and the Arctic Ocean and is gaining importance when coupled with other tracers (e.g. CFC, 236U). In this work, 129I concentrations in surface and depth profiles from the Nordic Seas and the North Atlantic (NA) Ocean collected from four different cruises between 2011 and 2012 are presented. This work allowed us to i) update information on 129I concentrations in these areas, required for the accurate use of 129I as a tracer of water masses; and ii) investigate the formation of deep water currents in the eastern part of the Nordic Seas, by the analysis of 129I concentrations and temperature-salinity (T-S) diagrams from locations within the Greenland Sea Gyre. In the Nordic Seas, 129I concentrations in seawater are of the order of 109 at·kg− 1, one or two orders of magnitude higher than those measured at the NA Ocean, not so importantly affected by the releases from the NFRP. 129I concentrations of the order of 108 atoms·kg− 1 at the Ellet Line and the PAP suggest a direct contribution from the NFRP in the NA Ocean. An increase in the concentrations in the Nordic Seas between 2002 and 2012 has been detected, which agrees with the temporal evolution of the 129I liquid discharges from the NFRPs in years prior to this. Finally, 129I profile concentrations, 129I inventories and T-S diagrams suggest that deep water formation occurred in the easternmost area of the Nordic Seas during 2012.
This work has been partially financed by the project FIS2015-69673-P by the Spanish Ministerio de Economía y Competitividad.
Databáze: OpenAIRE
Externí odkaz: