Dataset: CTD_Cokelet eco FOCI cruises
Deployment: MF0310

CTD casts from surface to near-bottom were collected using a Sea-Bird SBE 25 CTD, Sea-Bird SBE 19 Seacat CTD, or Sea-Bird SBE 911plus Seacat CTD (see dataset-deployment metadata for specific model used on each cruise). Salinity samples were analyzed on shore with an AutoSal, and corrections were applied to the CTD-measured salinities. Chlorophyll-a was inferred from fluorescence by a linear least-squares fit of laboratory-measured chlorophyll extracted from water-bottle samples versus fluorescence measured at the same depth and time.

CTD casts from surface to near-bottom or about 1500 m (whichever was shallower) were collected using a Sea-Bird SBE 911plus Seacat CTD (conductivity-temperature-depth) profiler carrying dual, pumped temperature and conductivity sensors and a single chlorophyll fluorescence sensor. The CTD sampled at 24 Hz and was lowered at 20 m/minute to just below the pycnocline and then at 50 m/minute below that.  Data were averaged into 1-decibar pressure bins.  Sea Bird gives the temperature and conductivity accuracy of 0.001 degrees C and 0.0003 S/m, respectively.  On each cast, a Niskin bottle collected discrete water samples alternating between the shallowest and deepest sampling depths.