S793Nutrient: Nutrient analyses were conducted by Tom Oswald under the supervision of R. E. Turner
S793Pigment: The Turner Designs model 10 fluorometer was calibrated for chlorophyll a against a chemical supply house chlorophyll a standard measured on a spectrophotometer yearly (or more frequently if needed). During the cruise, the Fluorometer was blanked and calibrated daily in accordance with Turner Designs recommended procedures. Chlorophyll concentrations were supervised and quality controlled by Nancy Rabalais.
S793Seabird: Temperature, dissolved oxygen, percent oxygen saturation, conductivity, salinity, density, percent light transmission, fluorescence and depth were acquired with a SeaBird 911 CTD system that was used to obtain water column profiles at all stations.
Oxygen concentration determinations, upper and lower end, were made prior to the cruise by the LUMCON CTD technician and entered into the SeaSoft configuration file. Winkler oxygen titrations were conducted during the cruise. A regression equation developed from Winkler titrations gave a strong, good relationship. A correction of the SeaBird oxygen data was not necessary.
Negative density sigma-t values are reported for two depths at station A'2.
Data reductions from the SeaBird were generated by Ben Cole and quality controlled by Nancy Rabalais.
S793Sal: Salinity determinations for surface water samples were made by on a Guildine Autosal maintained by the LSU Coastal Studies Institute shop.
S793Stns: Position coordinates were logged from RV Pelican’s Loran C/GPS. Station depths were logged from the ship’s fathometer.
N. Rabalais performed an additional procedure in quality-control/quality-assurance by evaluating relationships between the data in S793Nutrient, S793Pigment, S793Sal, S793Seabird and S793Stns.