title: A comparison of marine radionuclide dispersion models for the Baltic Sea in the frame of IAEA MODARIA program.
abstract: Four radionuclide dispersion models have been applied to simulate the transport and distribution of (137)Cs fallout from Chernobyl accident in the Baltic Sea. Models correspond to two categories: box models and hydrodynamic models which solve water circulation and then an advection/diffusion equation. In all cases, interactions of dissolved radionuclides with suspended matter and bed sediments are included. Model results have been compared with extensive field data obtained from HELCOM database. Inventories in the water column and seabed, as well as (137)Cs concentrations along 5 years in water and sediments of several sub-basins of the Baltic, have been used for model comparisons. Values predicted by the models for the target magnitudes are very similar and close to experimental values. Results suggest that some processes are not very relevant for radionuclide transport within the Baltic Sea, for instance the roles of the ice cover and, surprisingly, water stratification. Also, results confirm previous findings concerning multi-model applications.
authors.affiliation: Dpt Física Aplicada I, ETSIA, Universidad de Sevilla, Ctra Utrera km 1, 41013 Sevilla, Spain. Electronic address: rperianez@us.es.
authors.forename: R
authors.initials: R
authors.lastname: Periáñez
authors.affiliation: Ukrainian Center of Environmental and Water Projects, Glushkov av., 42, Kiev 03187, Ukraine.
authors.forename: R
authors.initials: R
authors.lastname: Bezhenar
authors.affiliation: Norwegian Radiation Protection Authority, Grini næringspark 13, NO-1332 Østerås, Norway.
authors.forename: M
authors.initials: M
authors.lastname: Iosjpe
authors.affiliation: Institute of Mathematical Machine and System Problems, Glushkov av., 42, Kiev 03187, Ukraine.
authors.forename: V
authors.initials: V
authors.lastname: Maderich
authors.affiliation: IAEA-MEL 4 Quai Antoine, MC-98000 Monaco Cedex, Monaco.
authors.forename: H
authors.initials: H
authors.lastname: Nies
authors.affiliation: IAEA-MEL 4 Quai Antoine, MC-98000 Monaco Cedex, Monaco.
authors.forename: I
authors.initials: I
authors.lastname: Osvath
authors.affiliation: STUK Radiation and Nuclear Safety Authority, Laippatie 4, 00880 Helsinki, Finland.
authors.forename: I
authors.initials: I
authors.lastname: Outola
authors.affiliation: NRG, Utrechtseweg 310, 6800 ES Arnhem, The Netherlands.
authors.forename: G
authors.initials: G
authors.lastname: de With
mesh_terms: D047852:Chernobyl Nuclear Accident; D057446:Hydrodynamics; D011834:Radiation Monitoring / Q000379:methods; D011847:Radioactive Fallout; D011868:Radioisotopes / Q000032:analysis*; D012623:Seawater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D011847:Radioactive Fallout; D011868:Radioisotopes; D014874:Water Pollutants, Chemical; D014875:Water Pollutants, Radioactive
keywords: (137)Cs; Baltic Sea; Box models; Dispersion; Hydrodynamic models; Sediment