182

4  5  6  7  8  9  10  11  12  13  14  15

Figure  35:  Chlorpyrifos  concentrations  [pg/L]  in  surface  water  (5  m)  in  the  North  Sea  (July  2004)  and
Baltic  Sea  (June  2004)

The  findings  of  the  survey  in  July  2003,  which  covered  the  entire  North  Sea,  are  in  line
with  those  of  the  German  Bight  survey.  Concentrations  in  the  southern  North  Sea  were
significantly  higher  than  in  the  northern  part.
Concentrations  in  the  western  Baltic  Sea  were  similar  to  those  in  the  German  Bight
(Figure  35).  The  values  at  most  stations  ranged  from  19  to  33  pg/L.  However,
concentrations  of  78  and  102  pg/L  were  found  in  the  Flensburg  Fjord.  These  elevated
levels  are  attributable  to  the  slow  water  exchange  in  this  bight  and  intensive  agricultural
activities  in  the  area.
In  2004,  some  samples  were  taken  in  the  Greenland  Sea  -  along  the  75  latitude  -  in
order  to  investigate  possible  long-range  transports  and  determine  background
concentrations.  However,  no  chlorpyrifos  above  the  LOD  was  found  in  these  samples.