Trace Metals in Water 
The concentrations of aluminium, zinc, 
indium, gallium, lead and cadmium in 
the water samples are shown in Table 1 
(see Appendix). 
The concentrations of the elements were 
compared with data from the long-term 
monitoring by the Federal Maritime and 
Hydrographic Agency. Since aluminium 
iS not measured as part of the marine 
environmental monitoring, the alumini- 
um concentrations were compared with 
data from literature studies. 
in the area N-4, the researchers observed 
a south-north gradient with regard to 
elevated concentrations of aluminium, 
zinc, indium and gallium in water, parti- 
cularly in 2018 and 2020 (see Figure 2). 
This indicates a possible enrichment 
along the prevailing south-north current 
along the coast. 
ar 
N-* 
K-12 
tu 
a" 
Yüre 2; Concentration of indidm IMthe su 
EN a Ar 
EAST SS CARE UNS 
German Bight during the campaign in 2020, 
Firhsburg 
m 
> Husum 
Schleswig 
>hleswig-Holstein 
£ 
in addition, zinc showed to be strongly 
dependant on the seasons. In contrast, 
the researchers could not detect any 
elevated concentrations of the harmful 
elements cadmium and lead. 
Furthermore, they observed static con- 
ditions in the surrounding of wind farms 
during certain weather conditions, which 
minimised the exchange and mixing of 
water. This in turn could lead to locally 
elevated concentrations of elements 
from the corrosion protection systems. 
Wind Farm Areas 
71.269 
0.011 
% 
N-1 
Indium Concentration 
in Water [ng/L] 
N-2 
N- 7 
nder 
\Mlhaimshavy! 
11Y 
4 emerh aven 
Nies eisachser 
Externe Datenquellen: BKG 
Geodätisches Datum: ETRS 89 
Kartenprojektion: LAEA 
BSH/01