21 
Figure 10. 
Total amounts of Pu- 
239,240 (Bq nr 2 ) at dif 
ferent sampling stations 
in the Baltic Sea at the 
beginning of the 2000s. 
Sub-region 
Number 
of sediment 
cores 
Maximum 
(Bq nr 2 ) 
Median 
(Bq nr 2 ) 
Total 
inventory 
(TBq) 
Bothnian Bay 
4 
94 
69 
1.25 
Bothnian Sea 
8 
178 
156 
6.86 
Gulf of Finland 
8 
299 
92 
1.60 
Baltic Proper + Gulf of Riga 
29 
265 
47 
5.60 
Belt Sea 
2 
51 
Total 
51 
15.3 
Table 3. 
Total inventories 
and maximum and 
median values of 
Pu-239,240 in dif 
ferent sub-regions 
of the Baltic Sea. 
Long-lived radionuclides in the seabed of the Baltic Sea