From CSIRO Marlin
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

RV Investigator Voyage IN2019_V02 Triaxus (undulating CTD) Data

Created 25/06/2025

Updated 25/06/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

This record describes the data (CTD, Dissolved Oxygen, Transmissometer, PAR, ECO Triplet, Nitrate, Fluorescence and LOPC) collected using the towed TRIAXUS platform on Investigator voyage IN2019_V02, titled: "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania; Subantarctic Biogeochemistry of Carbon and Iron, Southern Ocean Time Series Site". The voyage took place from Hobart (TAS) to Hobart (TAS) between 14th March to 4th April, 2019. Data for 3 Triaxus deployments were acquired in CAP CTD acquisition software using the Seabird SBE911 CTD 20. The deployments were conducted with a standard tow speed of between 7 to 9 knots and wire out ranged from 1050 to 1210 m. During the first two deployments, we encountered issues with the Transmissometer and biofouling of sensors. On the second deployment a communications issue was also addressed. Sea-Bird-supplied calibration factors and CSIRO supplied calibrations were used to compute the pressures, conductivity and temperature data. The data were subjected to automated QC to remove spikes and out-of-range values. Dissolved oxygen sensors, Transmissometer and Cosine Photosynthetically Active Radiation (PAR) sensor were also installed on the auxiliary A/D channels of the CTD. In addition to the auxiliary channels, ECO Triplet, Nitrate, FIRe and LOPC were mounted on the Triaxus as attached payloads. The standard data product (1 decibar/10 second binned averaged) was produced using data from the secondary sensors to produce an along-track time-series dataset for each CAP scan files. These scan files were grouped into legs, each containing a section of the Triaxus deployment and in each leg, vertical casts were created with interpolated values from the along-track time-series binned dataset with a maximum interpolation distance of 3 casts. These generated the along-track and vertical cast section data products for each Triaxus deployment Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report.

Files and APIs

Additional Info

Field Value
Title RV Investigator Voyage IN2019_V02 Triaxus (undulating CTD) Data
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/f64beb26-e44e-42a5-92bd-761c47ec7ea9
Contact Point
CSIRO Marlin Data Catalogue
data-requests-hf@csiro.au
Reference Period 14/03/2019 - 04/04/2019
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        140.0,
        -47.0
      ],
      [
        143.0,
        -47.0
      ],
      [
        143.0,
        -46.0
      ],
      [
        140.0,
        -46.0
      ],
      [
        140.0,
        -47.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "RV Investigator Voyage IN2019_V02 Triaxus (undulating CTD) Data". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/rv-investigator-voyage-in2019_v02-triaxus-undulating-ctd-data