302 
List of Figures 
Figure 4-54: Concentrations (ng/L) of selected phenylurea herbicides in near-surface 
sea water of the North Sea in AugSept 2011 220 
Figure 4-55: Mean concentrations (2008 to 2011) of herbicides in surface water (5 m) in 
the German Bight. 221 
Figure 4-56: Concentrations of herbicides as % of concentration of Stade in May 
2011 222 
Figure 4-57: Seasonal distribution of selected herbicides concentrations in the Elbe, in 
coastal waters and in the open sea; Q1: May/June, Q2: Aug./Sept., Q3: Oct./Nov. 
from 2008-2011 
225 
Figure 4-58: Temporal trends ofAtrazin and Terbutylazin surface water concentrations at 
three stations of the German Bight 226 
Figure 4-59: Temporal trends of Diuron- and Mecoprop surface water concentrations at 
three stations of the German Bight 227 
Figure 4-60: PFC concentrations [ng/L] in near-surface sea water (5 m) of the North Sea 
in Aug/Sept 2011. (PFBS: left; PFOA: middle; PFOS: right) 229 
Figure 4-61: Mean concentrations (2008 to 2011) of PFOA und PFOS in surface water 
(5 m) in the German Bight. 229 
Figure 4-62: Concentrations of PFC as % of concentration of Stade in May 2011 230 
Figure 4-63: Temporal trends of PFOA and PFOS surface water concentrations at three 
stations of the German Bight. 231 
Figure 4-64: Distribution statistics of the percent fraction of dissolved to total metal 
concentrations in sea water as box and whisker plots. All box statistics are based on 
winter samples (JFM) from 2000-2011 and are separated in four figures by increasing 
salinity ranges (upper left to lower right: 28-30, 30-32, 32-34, >34) 238 
Figure 4-65: Spatial near surface (10 m) element concentration distributions (Copper, 
Mercury and Nickel (columns) in filtrated water in 02/2008, 01/2009, 01/2010, 01/2011 
(rows) 241 
Figure 4-66: Spatial near surface (10 m) element concentration distributions (Man 
ganese, Lead and Zink (columns) in filtrated water in 02/2008, 01/2009, 01/2010, 
01/2011 (rows) 242 
Figure 4-67: Spatial structure of solved element concentrations in near surface water 
during the summer 2010 surveillance cruise 243 
Figure 4-68: Time series of yearly winter (JFM) distribution statistics in coastal (salinity 
30-32) near surface (10 m) water as box and whisker plot. OSPAR background refe 
rence concentrations are displayed as grey bar. 244 
Figure 4-69: Assessment of element burden in filtered near surface water (10 m). Dis 
tribution statistics of measurements in coastal (salinity 30-32, upper row of figures) 
and open North Sea (salinity >34, lower row of figures) water during the first quarter 
(JFM) of the years 2010 and 2011 as box and whisker plot. The left hand colour code 
indicates the assessment ranges: (blue) less than OSPAR-BRC, (green) greater than 
BRC and less then effect assessment value, (red) greater then effect assessment va 
lue (refer to 4.4.2.1). The right hand coloured dot relates to the assessment result of 
2011. An additional upward/downward arrow indicates a significant temporal trend 
during the recent five years 246