Baltic Sea

y the sensors in 205 m and 220 m depth. At the end of the inow period temperatures of
upper current meter decoupled from the two lower layers. Whereas temperatures in the deeper
layers between 205 m and the bottom were warmer than in the mid layer. Temperatures in the
top layer showed a higher variability during the whole measuring campaign than temperatures
below 175 m depth. Two large peaks in temperature were monitored in all three sensors around
8 January 2007 and at the end of March 2007. Between those dates temperatures in 205 m
and below were even more invariable than before the inow.
The hourly current meter records (coloured red in Fig. 5.1 in the appendix) of mooring SE
revealed that currents in all three depths were owing mainly in a northeastern direction.
Only on a few occasions they turned into a southerly direction. Current speeds were between
15 − 20 cm/s until the 2 November 2006 when speeds increased to nearly 50 cm/s in around
200 m. The increase was due to a storm between the 2 and 3 November and was visible in
all three current meters, although the wind had no instantaneous eect on the deep water.
Peak velocities were recorded by the top current meter in 175 m on the 3 November between
0 − 6 am, by the current meter in 205 m on the 3 November at 12 pm and by the bottom
current meter in 220 m 20 hours later on the 4 November at 8 am. These delays in maximum
currents speeds show that the storm event aected the whole deep basin, but not equally
across the whole water column. After the storm event current speeds were higher in general
with the deepest current meter recording the highest speeds, the mid current meter lower
speeds, whereas the speeds of top current meter were even lower than in 205 m. Only on one
occasion speeds rose to over 30 cm/s at around the end of January 2007.
Further north in the EGB the rst noteworthy sharp decrease in its daily temperature records
was recognised by the top current meter of mooring NE (see Fig. 4.5) at around 12 October.
These large temperature variations continued until 9 November 2006. Though it cannot be
ruled out that the start of the inow was not recorded by mooring NE since recordings from the
beginning of September are not available. Lowest temperatures (5.67 ◦ C) were visible in the
mid and lower temperature records of current meters in 208 and 223 m depth, a few days after
the rst decrease was recognised by the top sensor. Daily temperatures measured by the top
sensor in 178 m were slightly lower after the inow than temperatures measured by the mid and
lower sensor. After temperature variations of all sensors decreased by 9 November temperatures
measured by the top current meter were colder and had decoupled from temperatures of the
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