34

Figure  1:
,37 Cs  activity  concentrations  (in
Bq/kg  wet  weight)  in  herring
muscle  in  1984-2006,  as
annual  mean  values  by  basin.
The  target  value  has  been
calculated  as  average  of  the
pre-Chernobyl  (1984-1985)
activity  concentrations.  (Finnish
Environment  Institute,  SYKE)

BOTHNIAN  SEA

l.  0I0.QOO5a.B80B

ARCHIPELAGO  SEA

I

I

HinDHgBg0Büaaasaas

1984  1986  1988  1990  1992  1994  1996  1998  2000  2002  ;
YEAR

NORTHERN  BALTIC  PROPER

nifl.n.m.n.fl.n.m

I  1990  1992  1994  1996  1996  2000  2002  2004
YEAR

KATTEGAT

n

1

n  -  nj

n  n  Ulnllqnn

ü.

1984  1986  1988  1990  1992  1994  1996  1998  2000  2002  2004  2006
YEAR

ARKONA,  SOUND  AND  BELT  SEA

BOTHNIAN  BAY

1984  1986  1988  1990  1992  1994  1996  1998  2000  2002  2004  200«
YEAR

GULF  OF  FINLAND

..

IllllmilU,,  mn,

1M4  1966  11

»66  1990  1992  1994  1996  1996  2000  2002  2004  2006
YEAR

GULF  OF  RIGA

1984  1986  1968  1990  1992  1994  1996  1998  2000  2002  2004  2006
YEAR

GOTLAND  EAST  AND  WEST

1984  1986  1988  1990  1992  1994  1996  1998  2000  2002  2004  2006
YEAR

H  137 Cs  concentration  above  target  value
]  1S7 Cs  concentration  below  target  value
—  Target  level  =  2.5  Bq/kg

1984  1986  1988  1990  1992  1994  1996  1998  2000  2002  2004  2006
YEAR