From Australian Oceans Data Network
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

IMOS - Ships of Opportunity - Ocean Carbon Dioxide Data from RV Aurora Australis voyage AA1213V1 (Hobart-Hobart)

Created 23/06/2025

Updated 04/10/2025

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

This data was collected in November - December 2012 by the IMOS Ship of Opportunity Underway CO2 Measurement research group on RV Aurora Australis (IMOS platform code: VNAA) voyage AA1213V1. Departed: Hobart, Tasmania, November 19, 2012 Arrived: Hobart, Tasmania, December 14, 2012 CO2 System Overview: The fugacity of carbon dioxide (fCO2) in surface seawater was measured using a General Oceanics Inc. automated system (Model 8050; Pierrot et al 2009). Seawater is sprayed into an equilibration chamber and CO2 in the headspace gas equilibrates with the seawater. The headspace gas is pumped through a thermoelectric condenser followed by a nafion drying tube before flowing through a Licor 7000 non-dispersive infrared gas analyser used to measure the CO2 mole fraction (XCO2) of the dried air. The gas flow is stopped temporarily for the CO2 measurements, which are made at atmospheric pressure. A set of four CO2 standards that cover the range of CO2 values expected in the ocean are analysed about every three hours to calibrate the gas analyser. Atmospheric XCO2 (dry) is measured after the standards by pumping clean outside air from an intake on the forward mast of the ship. Seawater intake and ancillary data: The seawater intake is at about 6 m depth. A remote temperature sensor (Seabird Electronics SBE38) located at the intake is used to measure sea surface temperature (SST). Sea surface salinity is measured using a thermosalinograph (Seabird Electronics SBE21) mounted in the oceanographic lab next to the pCO2 system. The travel time between the intake and CO2 system is typically about 70 seconds with warming usually less than 0.7ºC in cold waters near freezing. The thermosalinograph water is from the same intake and supply line. Meteorological data, salinity, SST, and ships position and time are taken from the ship’s logging system.

Files and APIs

Tags

Additional Info

Field Value
Title IMOS - Ships of Opportunity - Ocean Carbon Dioxide Data from RV Aurora Australis voyage AA1213V1 (Hobart-Hobart)
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/d1c8fa8c-e5db-4c70-9b00-7b9c730acac6
Contact Point
Australian Ocean Data Network
info@aodn.org.au
Reference Period 18/11/2012 - 14/12/2012
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        74.7985,
        -68.572833
      ],
      [
        147.47,
        -68.572833
      ],
      [
        147.47,
        -42.8445
      ],
      [
        74.7985,
        -42.8445
      ],
      [
        74.7985,
        -68.572833
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "IMOS - Ships of Opportunity - Ocean Carbon Dioxide Data from RV Aurora Australis voyage AA1213V1 (Hobart-Hobart)". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/imos-ships-of-opportunity-ocean-carbon-dioxide-data-from-rv-aurora-australis-voyage-aa1213v1-ho