Data

Your access to the IMOS Southern Australia Mooring data discovery and exploration is through the Australian Ocean Data Network (AODN) Portal.

The Southern Australia mooring network collects the following time series data streams:

  • Water column velocity (x, y & z) at 4 m bins
  • Water temperature from several depths in the region
  • Conductivity/Salinity from several depths in the region
  • Pressure/depth of instruments from several depths in the region
  • Fluorescence from several depths in the region
  • Photosynthetically Active Radiation (PAR, only available at 35-40 m at the NRSKAI location)
  • Dissolved oxygen (DO) from several depths in the region
  • Turbidity from several depths in the region

The Southern Australia IMOS field program has completed more than 50 cruise surveys across the region. Each survey includes ~3-50 CTD cast profiles. We use the Seabird Electronics SBE19plus water profiler, sampling at 4Hz. Parameters sampled are:

  • Temperature
  • Conductivity/Salinity
  • Pressure/depth
  • Fluorescence with either the Wetlabs FLNTU or Chelsea Aquatracka III
  • PAR (Satlantic and Biospherical PAR sensors are used)
  • Dissolved oxygen (SBE43-membrane DO)
  • Backscatter/turbidity (Campbell Sci. OBS3+)

Biogeochemical (BGC) sampling at Southern Australia IMOS regional locations vary slightly between the IMOS National Reference Station (NRSKAI) and the Southern Australia IMOS biological sites. The IMOS site consists of Niskin bottle sampling at discrete depths; surface, 10, 20, 30, 40, 50, 75, 100 meters and depth integrated samples (composite) from 0 to 50 meters.

At the Southern Australia IMOS BGC sites, three discrete depths are sampled 5 m, the Deep Chlorophyll Maximum (DCM, determined by fluorescence profile) and 10 m above the bottom (2008-2012) or 10 m below the DCM (2013-current).

Parameters sampled include:

  •  IMOS reference station sampling:

    • Carbon
    • Alkalinity
    • Salinity
    • Nutrients
    • Total Suspended Solids (TSS)
    • Abundance & community composition

      • Microbes
      • Picophytoplankton
      • Phytoplankton
      • Zooplankton
      • Ichthyoplankton
      • Phytoplankton pigments (HPLC)

  •  Southern Australia IMOS BGC sites; i.e. SAM5CB and SAM8SG

    • Nutrients
    • Particulate Organic and Inorganic Matter (POM & PIM)
    • Abundance & community composition

      • Microbes
      • Picophytoplankton
      • Phytoplankton

    • Phytoplankton pigments

      • 2008-2012, spectrophotometry
      • Size fractionated 2013-current, HPLC

The data streams collected have been used in both blue sky research and applied research to a) understand the biophysical environment of the region (eg., upwelling) and b) to support the sustainable expansion of fisheries and aquaculture along Australia’s southern shelves. In addition, the data is being actively used for the Great Australian Bight Research Program as noted in the summary above.