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Time: 15:15 (UTC)
Lat: 50 09.369
Long: 004 57.673
Wind: 274° 19.5knots
Cloud: 4/8
Because the samples at this station were taken at 7.7m, it can only be compared to
the station 5 samples at 5.1m and station 6 samples at 5.6m. The chlorophyll concentration
is slightly lower than at station 5 and 6. The nitrate concentration is lower than
at station 5 and 6. The dissolved silicon and phosphate concentrations are higher
than at station 5 and 6. Oxygen saturation at this station is lower than station
5 and 6, which is most likely due to biology.
Nutrients, Chlorophyll and Dissolved Oxygen - Table
Irradiance levels at this station reduce with depth at an unsteady rate, unlike previous
stations. The fluorescence profile is stable with depth, never changing significantly
from its surface values. Temperature shows a very minor reduction with depth.
This station again shows characteristics of mixed waters, with even irradiance levels
displaying a more stable profile with depth. This further allows phytoplankton to
thrive more extensively down the water column.
|
Depth (m)
|
7.7
|
|
Salinity
|
35.2
|
|
Phosphate Concentration (µmol/L)
|
0.304
|
|
Dissolved Silicon Concentration (µmol/L)
|
3.45
|
|
Nitrate Concentration (µmol/L)
|
1
|
|
Chlorophyll Concentration (µg/L)
|
3.3
|
|
Oxygen Sat.
|
101.2 %
|
Backscatter: There is a high return from surface to 10m indicating a phytoplankton
layer, the CTD did not go below this but the fluorometer corroborates consistent
chlorophyll levels. At around 232983 this is mixed down to the 15m (bottom).
Velocity and direction: The magnitude is uniform throughout, the direction forms
two stratified layers. The top 10m is travelling southwest and the bottom 12m is
travelling in a northerly direction.
