Recent multi-tracer dating of the Black Sea sediments: Recovery of the late post-Chernobyl trends of radioactive contamination.

The combined use of artificial (Cs, Pu, Am) and naturally occurring (Pb/Ra, K) radionuclides as tracers for dating of the Black Sea sediments has allowed to reveal the recent increase in radioactive contamination of this basin with Cs after the Chernobyl accident. This is presumably caused by the prolonged input of the man-made radionuclides that showed a rise in the late 1990s - early 2000s, and by a possible post-deposition remobilization of Cs from the seabed.