List of Figures 
256 
System Nordsee 
Marine Chemistry 
Fig. 4-1: Total annual discharge of rivers Elbe, Weser, Ems, and Eider into the German Bight and 
associated loads of phosphate and nitrate during 1980 - 2005 156 
Fig. 4-2: (independence of nutrient loads on river discharge. Coloring of annual data according 
to time window (phosphate) or discharge threshold (nitrate) 157 
Fig. 4-3: Phosphate, Silicate, Nitrate, and Nitrite distributions (pmol/L) in surface water in winter 
2005. Note log 2 color scale (except for POj) 159 
Fig. 4-4: Silicate to phosphate ratio (M/M) in near-surface and -bottom water in winter 2005 
(note log2 color scale) 160 
Fig. 4-5: Geographical distributions (\imol/L) of phosphate, silicate, nitrate and nitrite in the 
German Bight in January/February 2005 162 
Fig. 4-6: Salinity distribution in near-surface sea water of the German Bight in winter 2005. For 
clarity, decimals in local salinities (red) are omitted. 163 
Fig. 4-7: Time series of wintry nutrient concentrations estimated for salinity 30, typical of coast 
al waters in the German Bight. Prediction limits are depicted as 95% bars. Elevated back 
ground levels (1.5 x background concentration) shown where available 164 
Fig. 4-8: Nitrate concentration (pmol/L) in near-surface and -bottom water of the North Sea in 
summer 2005 (note log 2 color scale) 166 
Fig. 4-9: Phosphate concentration (pmol/L) in near-surface and -bottom water of the North Sea 
in summer 2005 (note log 2 color scale) 167 
Fig. 4-10: Silicate concentration (\imol/L) in near-surface and -bottom water of the North Sea in 
summer 2005 (note log 2 color scale) 167 
Fig. 4-11: Ammonium concentration (\imol/L) in near-surface and -bottom water of the North 
Sea in summer 2005 (note log 2 color scale) 168 
Fig. 4-12: Nitrite concentration (\imol/L) in near-surface and -bottom water of the North Sea in 
summer 2005 (note log 2 color scale) 168 
Fig. 4-13: Chlorophyll concentration (pg/L) in near-surface and -bottom water of the North Sea 
in summer 2005 (note log 2 color scale) 169 
Fig. 4-14: Oxygen saturation (%) in near-surface and -bottom water of the North Sea in summer 
2005 170 
Fig. 4-15: DON and DOP concentration (\imol/L) in near-surface and -bottom water of the 
North Sea in summer 2005 172 
Fig. 4-16: C:N ratio (M/M) in near-surface and -bottom water of the North Sea in summer 2005. 
173 
Fig. 4-17: Vertical profiles along 56° N in summer 2005 (RV Gauß, cruise #446) of chlorophyll, 
various nutrients, and oxygen 174 
Fig. 4-18: Observational network for contaminant monitoring in the German Bight. 178 
Fig. 4-19: FICFI concentrations and a:y-HCH ratio for near-surface sea water (5 m) of the Ger 
man Bight. 181 
Fig. 4-20: FICFI concentrations and a:y-FICFI ratio for near-surface sea water (5 m) of the North 
Sea. In undersampled regions (beyond red boundaries), spatial estimates are poorly con 
strained and, hence, should not be mistaken for factual information 182 
Fig. 4-21: FICFI-concentration vs. salinity in near-surface sea water of the German Bight in May 
2005. Slope of regression lines with 95 % confidence interval. 184 
Fig. 4-22: Temporal evolution since 1987 of a- and y-FICFI concentrations at station Elbe 1 (ex 
T41). Figures inside bullets give month of observation (1,2,3,...,0,N,D) 185