Title: Does the Fukushima NPP disaster affect the caesium activity of North Atlantic Ocean fish?
Source: Biogeosciences Discussions
Authors: G. Kanisch and M.-O. Aust; Thünen Institute of Fisheries Ecology, Hamburg, Germany
Date Published: March 5, 2013
Fillet samples of marine fish collected from the East/West Greenland current (GC) and from the Baltic Sea (BS), have been investigated by gamma-ray spectrometry within the regular German monitoring program. In samples of the second half of 2011 134Cs traces have been detected, suggested to originate from the Fukushima fallout being deposited in March/April 2011 over the northern North Atlantic and accumulated by fish. The radionuclide 134Cs (half-live 2 yr) was indeed detected with quite small activities at about 0.0036 Bq kg−1 w.w. [...] Model results confirmed the level of 134Cs measured in BS fish and showed its maximum to have occurred in winter 2011/2012 followed by a continuous decrease. It was also determined that 134Cs activity, but not that of 134Cs, showed a significant negative correlation with sampling depth (150–400 m) of GC fish; this strengthens our Fukushima fallout assumption. [...]
[...] the aims of our study were (i) to determine the activity concentration of caesium isotopes in cod and redfish as economically relevant fish species 5 in the North Atlantic Ocean and its marginal seas, (ii) separate the FD-NPP input from that from Chernobyl and Global Fallout, and (iii) validate the determinations and estimate the future behaviour of caesium isotopes in fish of the Baltic Sea [...]
Published: March 12th, 2013 at 11:44 am ET