As observed at other stations, irradiance showed the typical exponential decay with depth. Temperature data again indicated the presence of a thermocline at 17m, dropping about 0.7C. A halocline appeared to be present at approximately this same depth with a large variation in salinity on either side. The CDOM and fluorescence data both indicate a deep chlorophyll maximum at the thermocline as they increase at that depth.

All nutrients showed lower concentrations near the surface than at depth which is typical of a more stratified water column where primary producers use up shallow water nutrients which are not readily replaced. Silicate initially increased in concentration from 10 to 15 m, then decreased again for a further 5m, before increasing again steadily through the remaining water column. This could be an indicator of diatoms using the available silicate in the top few meters of water. As silicate concentrations increased below 20 m, it is likely that diatom abundance decreased below this depth allowing some remineralisation to occur.  This was also supported by the increase in fluorescence with depth seemingly halting at 20 m and remaining almost constant for the rest of the column.

C6