U. Callies et al.: Surface drifters in the inner German Bight 
811 
www.ocean-sci.net/13/799/2017/ 
Ocean Sci., 13, 799-827, 2017 
BSHcmod+W 
r 
TQIIU1 
(a) 19 June (day 23) 
55* 
54' 
23 Ju 
ne (day 27) 
Stokes 
Winda 
i drift: OFF 
ge: ON (0.6%) 
4 
\ 
(C) 1 Jui : 
55* 
8 Jul 
(day 42) 
— 
EX 
Stokes 
Winda 
¡drift: OFF 
ge: ON (0.6%) 
- 
,L 
La 
23 Ju 
ne (day 27) 
7“ 
JL 
$ 
NT 
Stokes 
Winda 
drift: OFF 
go: OFF 
\ 
fi 
55" 
54' 
1 Jul 
(day 35) 
\ 
N^\\ 
o 1 
\ 5 
el 
Stokes 
Winda 
drift: OFF 
go: OFF 
- 
i 
55" 
M- 54" 
8 Jul 
(day 42) 
= 
7 
VT 
£J 
nV? p. 
li[ 
drift: OFF 
go: OFF 
* 
55" 
6" 7" 
20 cm s -1 {18 km per 25 h) 
6" 7" 8" 
20 cm s -1 (18 km per 25 h) 
Figure 9. Continued from Figs. 7 and 8. 
additional windage could not eradicate this deficiency. 
TRIM simulations perform slightly better (Fig. 8g). 
Days 17-20 (13-16 June): During days 17-19, the circu 
lation is anticyclonic, driven by north-westerly winds 
(Fig. 3). Simulations based on either model consistently 
produce drift velocities that are markedly rotated to the 
left of observations (Figs. 8d, h and lOd). 
On day 20, the wind direction turns to the south-west 
in BSHcmod or west in TRIM (Fig. 3); the residual