title: (137)Cs vertical distribution at the deep basins of the North and Central Aegean Sea, Greece.
abstract: Large volume seawater samples were collected for the determination of (137)Cs concentration along with depth in the deep basins of North and Central Aegean Sea. The vertical (137)Cs distribution showed maximum concentration at the bottom of the basins, while the minimum values corresponded to the intermediate layer, where Levantine water exists. The surface (137)Cs activity is found to lie between the two limits and is originated from the Black Sea waters. The typical oceanographic advection-diffusion balance model is modified to a diffusion-settling-decay balance model to better understand the vertical distribution and variation of the (137)Cs concentration in the deep basins. In addition, the diffusivity of each basin, as well as the settling speed of particulate (137)Cs is also estimated. The results are compared with theoretical approach as well as with previous data.
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, Anavyssos, Greece. Electronic address: tsabaris@hcmr.gr.
authors.forename: C
authors.initials: C
authors.lastname: Tsabaris
authors.affiliation: University of the Aegean, Department of Marine Sciences, Mytilene, Greece.
authors.forename: V
authors.initials: V
authors.lastname: Zervakis
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, Anavyssos, Greece.
authors.forename: H
authors.initials: H
authors.lastname: Kaberi
authors.affiliation: ENEA, Marine Environment Research Centre, La Spezia, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Delfanti
authors.affiliation: Hellenic Centre for Marine Research, Institute of Oceanography, Anavyssos, Greece.
authors.forename: D
authors.initials: D
authors.lastname: Georgopoulos
authors.affiliation: National Centre for Scientific Research "Demokritos", Agia Paraskevi, Greece.
authors.forename: M
authors.initials: M
authors.lastname: Lampropoulou
authors.affiliation: National Centre for Scientific Research "Demokritos", Agia Paraskevi, Greece.
authors.forename: C A
authors.initials: CA
authors.lastname: Kalfas
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D047852:Chernobyl Nuclear Accident; D004058:Diffusion; D005843:Geography; D019015:Geologic Sediments; D006115:Greece; D008962:Models, Theoretical; D009792:Oceans and Seas; D011834:Radiation Monitoring / Q000379:methods; D054712:Salinity; D012623:Seawater; D013696:Temperature; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D014875:Water Pollutants, Radioactive
keywords: (137)Cs profile; 1D-model; Aegean Sea; Deep basins