chlorophyll-a concentration (Fig. 13.8), present high concentration in previously
mentioned areas mainly in front of the Danube Mouth due to the nutrient rich
waters. Also, in this shallow areas, the sediment transport is very dynamic due to
the sea currents and waves. The north-to-south regional depth circulation feature
determine at the 20 m isobaths similar values of 200–240 Bq/kg.
Long term radioisotopes like
241 Pu with a halflife of 14 years (Boulyga et al.
1997; Sasahara et al. 2004; Rumynin and Nikulenkov 2016) released in large
amounts by the Cernobyl event, are responsible, among other processes, for the
presence of
241 Am that can be traced within our samples.
Fig. 13.5
232
Th and
226
Ra concentration distribution for the Romanian Black Sea Region
Fig. 13.6
137
Cs Distribution for the Romanian Sector of Black Sea
13 Radionuclides Assessment for the Romanian Black Sea Shelf
229
mentioned areas mainly in front of the Danube Mouth due to the nutrient rich
waters. Also, in this shallow areas, the sediment transport is very dynamic due to
the sea currents and waves. The north-to-south regional depth circulation feature
determine at the 20 m isobaths similar values of 200–240 Bq/kg.
Long term radioisotopes like
241 Pu with a halflife of 14 years (Boulyga et al.
1997; Sasahara et al. 2004; Rumynin and Nikulenkov 2016) released in large
amounts by the Cernobyl event, are responsible, among other processes, for the
presence of
241 Am that can be traced within our samples.
Fig. 13.5
232
Th and
226
Ra concentration distribution for the Romanian Black Sea Region
Fig. 13.6
137
Cs Distribution for the Romanian Sector of Black Sea
13 Radionuclides Assessment for the Romanian Black Sea Shelf
229