Baltic Sea

For this reason, the displayed temperature values in Fig. 4.5 exhibit a shorter time period
than the two other moorings SE and SW. Having said that the inow entered the basin in
intermediate layers in September 2006 and as a result large parts of it were also captured by
the NE mooring.
First daily temperature recordings of all three currents meters of mooring SE are analysed.
The deployed instruments cover the whole enclosed deep basin with current meters in 175
m, 205 m and 220 m depth. Daily temperatures recorded by the upper most sensor (175 m)
of mooring SE oscillated around 5.95 ◦ C before the inow and were marginally higher than
temperatures measured by both the mid (205 m) and lower sensor (220 m). Before the inow
was registered by the temperature sensors of the mid and lower current meter, temperatures
seemed to be quite stable over larger periods of time and displayed only little uctuations.
These stable periods are not necessarily caused by well mixed water masses, but could also
be due to a lack of accuracy of current meter's temperature sensors (accuracy of ±0.05 ◦ C).
The inow (see Fig. 4.4) was rst recognised by the uppermost sensor around 7 September
2006 and ended around 20 September 2006. Coldest temperatures of 5.65 ◦ C were recorded
6.4
6.3
175 m
205 m
220 m
Daily Temperatures Mooring SE
6.2
6.1
Temperature ( o C)
6
5.9
5.8
5.7
5.6
5.5
5.4
22/06/06 11/08/06 30/09/06 19/11/06 08/01/07 27/02/07
Date (dd/mm/yy)
Figure 4.4: Temperatures in 175, 205 and 220 m depth of mooring SE.
49