28 
Figure 2: 
Time trends for the total 
amounts of ,37 Cs (Bq/m 2 ) at 
monitoring stations in the Baltic 
Sea. During the years 1999- 
2006, the amounts of ,37 Cs 
remained relatively unchanged 
at the different monitoring 
stations, although there were 
considerable differences 
between the stations. The 
variability in results is mainly 
due to the heterogeneity of soft 
sediment deposits around the 
monitoring stations and the 
bottom dynamics affecting the 
accumulation and redistribution 
of the sediments. Sampling 
techniques and analysing 
methods may also affect the 
results. 
60000 
FBELT1 
60000 
P5 
50000 
50000 
Ì40000 
Ì 40000 
CD 
a 
£ 30000 
£ 30000 
r*. 
K 
' 20000 
1 20000 
O 
o 
10000 
10000 
84 86 88 90 92 94 96 98 00 02 04 06 
84 86 88 90 92 94 96 98 00 02 04 06 
YEAR 
YEAR 
Printed in SYKE, Helsinki, 19 September 2007 
SYKE