Chemistry Reference
In-Depth Information
Fig. 15 Estimated environmental distributions of PCB 153: (a) emissions to the atmosphere;
(b) ambient air concentrations over the European continent (Gusev et al. 2007)
Fig. 16 Estimated environmental distributions of benzo[
a
]pyrene: emissions to the atmosphere
(a) and ambient air concentrations over Europe (b) (Gusev et al. 2007)
continent between 1-8 pg/m
3
for PCB153 and 0.005-1 ng/m
3
for benzo[
a
]pyrene
which are in agreement with the ambient air POP measurements on the European
continent (Figs.
15b
and
16b
).
Results from the EMEP observation stations that annually report the monthly
POP concentrations [EMEP/ccc-reports (
http://www.nilu.no/projects/ccc/reports
)]
are shown in Figs.
15b
and
16b
. These stations are located in central and northern
Europe, so temporal information on POP concentrations in southern Europe, such
as the Mediterranean, is missing. The present network of monitoring stations shows
that in the period between 2002 and 2009, the lowest concentrations were observed
at high latitudes in Spitsbergen, in the Arctic sea and that they increased with
decreasing latitudes, with highest concentration in central Europe (e.g. Czech
Republic).
