RV Investigator Voyage IN2017_V01 CTD Data

• Other Authors: CSIRO (hasAssociationWith), CSIRO O&A, Information & Data Centre (pointOfContact), CSIRO Oceans & Atmosphere - Hobart (hasAssociationWith), CSIRO/Oceans and Atmosphere (hasAssociationWith), Data Officer (AR), Hobart (processor), Dirita, Vito (originator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: oceans; Earth Science | Oceans | Ocean Optics | Photosynthetically Active Radiation; Earth Science | Oceans | Ocean Pressure | Water Pressure; Earth Science | Oceans | Ocean Optics | Turbidity; Earth Science | Oceans | Ocean Temperature | Water Temperature; Earth Science | Oceans | Salinity/Density | Salinity; Earth Science | Oceans | Ocean Chemistry | Chlorophyll; Earth Science | Terrestrial Hydrosphere | Water Quality/Water Chemistry | Light Transmission; Earth Science | Oceans | Ocean Optics | Fluorescence; Earth Science | Oceans | Ocean Chemistry | Nitrate; Fluorometers; Nephelometers; Radiation Sensors; CTDs (Conductivity-Temperature-Depth Profilers); NOX monitor; Global / Oceans | Southern Ocean; Marine Planning Regions (Australia) | Australian Antarctic; Marine National Facility; Research Voyage: IN2017_V01; Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles; Vessel Data: CTD; Ship: Investigator (RV); Practical salinity of the water body; Temperature of the water body; Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it; Pressure (measured variable) in the water body exerted by overlying sea water only; research vessel; CTD; Antarctic; Southern Ocean; Totten Glacier; Vito; Antarc*
• Online Access: https://researchdata.edu.au/rv-investigator-voyage-ctd-data/1329415

Maintenance and Update Frequency: asNeeded Statement: Original field data. Data processing and quality control by the Marine National Facility Data Acquisition and Processing Group (DAP). Data processed and archived on 11/04/2018. Data were processed using the new CapPro system. For this voyage a moving window filter was applied to remove noise spikes from the Pressure, conductivity and oxygen sensor values. Credit CTD data processed by Steve Van Graas (CSIRO O&A) Data archived by Vito Dirita (CSIRO O&A). This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2017_V01 titled: "Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles." The voyage took place from Hobart (TAS) to Hobart between the 14th January and 5th March, 2017. Data for 33 deployments were acquired during this voyage using a Seabird SBE911 CTD, fitted with 36 twelve litre bottles on the rosette sampler. Casts 1-10, 13 – 33 were acquired using the Seabird SBE911 CTD unit 20, and casts 11 and 12 were acquired using the Seabird SBE911 CTD unit 22. CTD and sensors were changed in efforts to remediate sensor issues. CSIRO -supplied calibration factors were used to compute the pressures, and preliminary temperature and conductivity values. The data were subjected to automated QC to remove spikes and out-of-range values. Processing was completed using CapPro processing software, version 2.9. For the duration of the voyage significant spikes were observed across all recorded sensor channels. Investigation strongly suggests electrical interference was the cause of the data spikes, as mitigation measures have alleviated the issue. Care was taken in post processing to remove the spikes while maintaining true data features. The nature of the spiking was primarily extreme values persisting for a single scan, which were suitably detected and flagged by evaluating the second-difference of the data. An additional filter was also ...