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Updated: Jul 12, 2026

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
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Published on: June 13, 2020

Development of the circum-antarctic current.

J P Kennett, R E Houtz, P B Andrews

    Science (New York, N.Y.)
    |October 11, 1974
    PubMed
    Summary
    This summary is machine-generated.

    The Circum-Antarctic Current formed approximately 30 million years ago. This occurred during the Oligocene epoch following the separation of Antarctica from the South Tasman Rise.

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    Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine

    Published on: March 13, 2017

    Area of Science:

    • Paleoceanography
    • Geology
    • Antarctic Studies

    Background:

    • The Southern Ocean's oceanographic history is crucial for understanding global climate dynamics.
    • The opening of oceanic gateways significantly influences ocean current systems and heat distribution.

    Purpose of the Study:

    • To determine the timing of the Circum-Antarctic Current's formation.
    • To investigate the paleogeographic events leading to the current's establishment.

    Main Methods:

    • Deep-sea drilling south of Australia and New Zealand.
    • Analysis of sediment cores to reconstruct paleoceanographic conditions.

    Main Results:

    • Evidence suggests the Circum-Antarctic Current developed around 30 million years ago.
    • This timing correlates with the final separation of Antarctica and the South Tasman Rise.
    • Australia's northward drift from Antarctica began 20 million years earlier.

    Conclusions:

    • The Oligocene epoch marked a pivotal period in Southern Ocean paleoceanography.
    • The establishment of the Circum-Antarctic Current was driven by continental drift and tectonic separation.