This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2022_T01, titled: "Transit: Cairns to Darwin 2022". The voyage took place between 11 and 17 September 2022, departing from Cairns and returning to Darwin. .
Data for 1 CTD deployment were acquired using the Sea-Bird SBE911 CTD unit #22 (S/N 1039), fitted with 36 twelve-litre bottles on the rosette sampler. Sea-Bird-supplied calibration factors were used to compute the pressures and preliminary conductivity values. CSIRO-supplied calibrations were applied to the temperature data. The data were subjected to automated QC to remove spikes and out-of-range values.
During the deployment, the Niskin bottles labelled #18 & #19 were in swapped positions on the rosette. The bottle in position #19 was not fired at the planned depth (which was the chlorophyll maximum), but it was fired at the next depth stop. This was accounted for in the hydrology data and did not impact processing or data quality.
The final conductivity calibration from the secondary sensor had a standard deviation (SD) of 0.0024157 PSU, outside our target of ‘less than 0.002 PSU’. The standard product of 1-decibar binned averages were produced using data from the secondary sensors.
The dissolved oxygen data calibration fit had a SD of 0.85269 μM. The agreement between the CTD and bottle data was good.
An ECO Triplet was also installed on the auxiliary A/D channels of the CTD, and its data were logged in Seasave with calibration values applied. The only processing applied by CapPro was NaN filtering, and the resulting ECO Triplet data are present in the average file.
To access the full voyage plan and other reports and data associated with this voyage, please see the contact information at the end of this report.
