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Historical February Sea-Surface Temperature Estimates Utilising Diatom Transfer Functions with Core MD88-787

Created 23/06/2025

Updated 23/06/2025

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The purpose of this study was to estimate past sea-surface temperature in the Southeast Indian Ocean. The accumulation of diatom microplankton assemblages in sediments being the proxy for these records of climatic change. A transfer function is a mathematical method that allows quantitative estimations of environmental parameters from past biogenic sedimentation. In this study, a diatom transfer function was established to relate biological species to selected environmental parameter of the ocean (sea-surface temp). These equations were then employed on observed fossil species from core samples to provide quantitative estimates of sea-surface temperature. Estimates of sea-surface temperature are given here based on the assemblages of diatoms found in core MD88-787. The information provided gives the extrapolated age-scale through the core, and two estimates of feb SST based on different diatom transfer functions (DTF 109/24/6 and DTF 166/34/4). It is probable that the 'real' SST signal lies between the model estimates. The model diagnostics and lower number of non-analogue events from DTF 109/24/6 over that of results produced by DTF 166/34/4 suggest that SST estimates are closer to those provided by the former model.

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Additional Info

Field Value
Title Historical February Sea-Surface Temperature Estimates Utilising Diatom Transfer Functions with Core MD88-787
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/98706b6c-1e91-4d1a-be8f-5f7413758264
Contact Point
Australian Ocean Data Network
patrick.dedeckker@anu.edu.au
Reference Period 01/01/1988 - 01/01/1988
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        145.0,
        -56.5
      ],
      [
        145.5,
        -56.5
      ],
      [
        145.5,
        -56.0
      ],
      [
        145.0,
        -56.0
      ],
      [
        145.0,
        -56.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Historical February Sea-Surface Temperature Estimates Utilising Diatom Transfer Functions with Core MD88-787". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/historical-february-sea-surface-temperature-estimates-utilising-diatom-transfer-functions-w-7871