806 
U. Callies et al.: Surface drifters in the inner German Bight 
Ocean Sci., 13, 799-827, 2017 
www.ocean-sci.net/13/799/2017/ 
(a) Observations drifter no. 1 
(b) Observations drifter no. 5 
Start 
End: 
30 May 2015, 
)8 Jun 2015, 0 
D8:36 UTC 
9:59 UTC 
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-8-6-4-2 0 2 4 6 8 1012141618202224262830323436384042444648505254 
Days Since 2015-05-27-13=00 UTC 
Figure 4. Observed trajectories of six drifters deployed at the locations indicated by black crosses. Drift paths were segmented using the 
colour code introduced in Table Si. The numerical data underlying this plot can be found in the Supplement. 
locities (Fig. 6). Although trajectories are complex (Fig. 4), 
they show resemblance, explicable by moderate distances 
between the three drifters. In the beginning of its journey, 
drifter no. 9, having started further away in the south-east 
of the domain, behaves differently (days 4—9; see Fig. 6). 
A much better coherence with other drift paths is found dur 
ing days 11-20 (7-16 June) characterized by the close prox 
imity of drifter nos. 6 and 8. The journey of drifter no. 1 has 
just a small overlap with those of other drifters; the drifter is 
soon trapped within the entrance to tidal basins (Fig. 4a).