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CTD profiles from the MV1008 cruise in the Costa Rica Dome region of the Eastern Tropical Pacific Ocean.
These data are from ship processed CTD data, R/V Melville, July 2010. Sampling instruments consisted of a Sea-Bird Electronics SBE9plus CTD with dual pumps (SBE5), dual temperature (SBE3plus), reference temperature (SBE35RT), dual conductivity (SBE4C), dissolved oxygen (SBE43), transmissometer (Wetlabs), fluorometer (Wetlabs CDOM), and PAR sensor (Biospherical).
Data were extracted at 1 decibar intervals.
BCO-DMO processing notes: - Original data were joined to the MV1008 event log to obtain ISO_DateTime_UTC for each event. - Lat and lon were formatted to display 4 decimal places. - Missing values were replaced with 'nd' to indicate 'no data'.
Sampling instruments consisted of a Sea-Bird Electronics SBE9plus CTD with dual pumps (SBE5), dual temperature (SBE3plus), reference temperature (SBE35RT), dual conductivity (SBE4C), dissolved oxygen (SBE43), transmissometer (Wetlabs), fluorometer (Wetlabs CDOM), and PAR sensor (Biospherical).
The Sea-Bird SBE 9 is a type of CTD instrument package. The SBE 9 is the Underwater Unit and is most often combined with the SBE 11 Deck Unit (for real-time readout using conductive wire) when deployed from a research 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, fluorometer, altimeter, etc.). Note that in most cases, it is more accurate to specify SBE 911 than SBE 9 since it is likely a SBE 11 deck unit was used. more information from Sea-Bird Electronics
The SBE9plus CTD contained a WetLabs fluorometer.
A CTD-fluorometer is an instrument package designed to measure hydrographic information (pressure, temperature and conductivity) and chlorophyll fluorescence.
The SBE9plus CTD contained a Biospherical PAR sensor.
The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.
The SBE9plus CTD contained an SBE43 dissolved oxygen sensor.
The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics
The SBE9plus CTD contained dual SBE3plus temperature sensors.
The SBE-3 is a slow response, frequency output temperature sensor manufactured by Sea-Bird Electronics, Inc. (Bellevue, Washington, USA). It has an initial accuracy of +/- 0.001 degrees Celsius with a stability of +/- 0.002 degrees Celsius per year and measures seawater temperature in the range of -5.0 to +35 degrees Celsius. more information from Sea-Bird Electronics
The SBE9plus CTD contained dual SBE4C conductivity sensors.
The Sea-Bird SBE-4 conductivity sensor is a modular, self-contained instrument that measures conductivity from 0 to 7 Siemens/meter. The sensors (Version 2; S/N 2000 and higher) have electrically isolated power circuits and optically coupled outputs to eliminate any possibility of noise and corrosion caused by ground loops. The sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Because the outer electrodes are connected together, electric fields are confined inside the cell, making the measured resistance (and instrument calibration) independent of calibration bath size or proximity to protective cages or other objects.
The SBE9plus CTD contained a WetLabs transmissometer.
A transmissometer measures the beam attenuation coefficient of the lightsource over the instrument's path-length. This instrument designation is used when specific manufacturer, make and model are not known.
Event number.
CTD cast number.
Latitude in degrees North.
Longitude in degrees East.
Date and time of the event (UTC) formatted to ISO 8601 standard; added by BCO-DMO from the MV1008 event log. format: YYYY-mm-ddTHH:MM:SS.xx
Pressure.
Water temperature measured by CTD.
Salinity measured by CTD.
Dissolved oxygen measure by CTD.
Transmissometer (light transmission).
Fluorometer voltage measurement.
Time elapsed during the CTD cast.
Photosynthetically Available Radiaton (PAR).
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