8 
Table 3 
Summary statistics of low-frequency currents - MOVENS section 
instrument 
depth 
u 
u ’u ’ 
V 
vV 
V 
SF 
dir. 
m 
cm/s 
cm 2 /s 2 
cm/s 
cm 2 /s 2 
cm/s 
% 
O 
cm 2 /s 2 
M6 117 
0.6 
24.5 
-4.0 
74.6 
4.1 
32 
171 
49.5 
8.3 
189 
0.9 
13.4 
-2.6 
53.7 
2.7 
27 
162 
33.5 
3.8 
247 
0.4 
21.1 
-1.9 
29.7 
1.9 
23 
167 
25.4 
1.9 
304 
0.7 
18.0 
2.0 
21.0 
2.1 
22 
20 
38.1 
2.3 
M7 70 
-6.7 
96.2 
1.0 
131.7 
6.7 
41 
279 
114.0 
22.8 
120 
-8.3 
93.4 
-1.1 
82.9 
8.3 
55 
262 
88.2 
34.9 
225 
-6.2 
57.4 
4.1 
98.9 
7.4 
53 
303 
78.1 
27.5 
288 
-5.5 
45.0 
4.7 
89.9 
7.3 
54 
310 
67.4 
26.4 
365 
-6.1 
53.9 
5.4 
88.7 
8.2 
59 
312 
71.3 
33.3 
M8 90 
4.5 
18.2 
-8.6 
46.7 
9.7 
78 
153 
32.4 
47.0 
163 
4.5 
16.5 
-7.0 
44.9 
8.3 
75 
148 
30.7 
34.7 
226 
3.1 
34.8 
-5.7 
36.3 
6.5 
69 
151 
35.5 
21.5 
286 
3.3 
12.7 
-4.8 
38.5 
5.8 
62 
145 
25.6 
17.0 
348 
3.6 
22.3 
-2.4 
41.9 
4.3 
46 
123 
32.1 
9.2 
M9 60 
-0.5 
37.1 
-4.1 
86.3 
4.1 
34 
187 
61.7 
8.5 
130 
-0.6 
66.7 
^1.0 
44.7 
4.0 
38 
189 
55.7 
8.1 
240 
-0.7 
33.4 
-0.1 
34.8 
0.7 
9 
263 
34.1 
0.2 
300 
-0.1 
25.9 
1.4 
33.1 
1.4 
18 
355 
29.5 
1.0 
403 
-0.4 
39.0 
3.7 
48.8 
3.8 
39 
353 
43.9 
7.1 
M10 55 
-0.9 
86.1 
12.1 
90.5 
12.1 
67 
355 
88.3 
73.3 
75 
1.1 
31.0 
7.5 
45.6 
7.5 
65 
8 
38.3 
28.5 
126 
0.3 
1.7 
0.9 
3.0 
0.9 
29 
17 
2.4 
0.5 
205 
0.0 
13.3 
1.7 
29.3 
1.7 
22 
1 
21.3 
1.5 
Ti,v = means of the zonal and meridional component of the current vector; 
u’u’, vV = zonal and meridional variances; 
v = mean vector speed; 
SF = stability factor: (v/vj * 100; 
dir = mean direction; 
kfr k M = eddy and mean kinetic energy 
According to Svendsen et al. [1991], some AW enters the North Sea east of the Shetlands with 
great year to year variability. In addition, mixed Scottish coastal water and AW enter through the Orkney- 
Shetland channel southwards, known as the Fair Isle Current (FIC). The FIC has a seasonal variability with 
volume transports of the order of 4x10 5 m 3 /s in the summer and 1.5x10 s m 3 /s in the winter. At about 58° N, 
the FIC turns eastwards and - known as the Dooley Current - roughly follows the 100 m isobath towards 
the Norwegian Trench (Tu rre 11 et al. [1990]). 
Figure 1 shows the vertically averaged, low-passed mean currents (vectors at the NORA and 
MOYENS positions, together with the general circulation pattern. The mean currents at each instrument are 
shown in Figure 2. In Figure 1, no account is taken of the data from the upper 30 metres of the water column. 
This is done to minimize the influence of the local wind. Moorings N6 to N8 were placed across the 
Norwegian trench. N7 lies in the center of the trench, close to the maximum depth of the NORA section. N6 
and N7 lie on the western and eastern slope of the trench, respectively. As expected, we observe the outflow 
of the NCC at N7 and N8, and the inflow of AW at N6 at the western edge of the Norwegian Trench (see 
Fig. 3). The associated volume transports during NORA amounted to about 13x10 s m 3 /s (NCC) and 
6x10 s m 3 /s (AW).