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Sea-Bird SBE 9 CTD data measurements using Sea-Bird Software SBE Seasave at standard CTD stations: profiles (down casts) with water sampling (up casts).
CTD Data processing: Sea-Bird Software SBE Data Processing;
Nutrient data processing: water filtering, samples processing and preserving, standard methods for further samples processing.
SeaBird 911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors At each station, CTD casts measured temperature, salinity and PAR. Water samples collected at depths of 300, 250, 200, 150, 120, 100, 80, 60, 40, 30, 20, 10 m, and the surface were filtered and preserved for nutrient analysis.
The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). More information from Sea-Bird Electronics.
A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.
Digiquartz
A pressure sensor is a device used to measure absolute, differential, or gauge pressures. It is used only when detailed instrument documentation is not available.
The Seapoint Turbidity Meter detects light scattered by particles suspended in water, generating an output voltage proportional to turbidity or suspended solids.
Submersible fluorometer designed for through-flow or pumped CTD applications manufactured by WetLabs and which can be configured for various types of fluorescence. The probe has a temperature range of 0-30 degrees C and a depth rating of 600 meters.
Sampling year
Vessel identifier: 1 - R/V Tioga, 2 - R/V Connecticut, 3 - R/V Gulf Challenger, 4 - R/V Warren Jr., 5 - R/V Scarlett Isabella
Cruise identifier
Station number
Niskin bottle number
Sample depth
Pressure
Bottom depth
Temperature
Salinity
Sigma-theta density from primary sensor
Oxygen
Fluoresence
Beam Transmission Chelsea/Seatech
conductivity
Raw oxygen
NO3+NO2
Si(OH)4
NH4
PO4
pH
Station latitude, south is negative
Station longitude, west is negative
Date and time of start CTD cast in UTC, standard ISO format (yyyy-mm-ddThh:mmZ)
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