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Amundsen Sea drifts: indications for changing climate and oceanographic conditions
Uenzelmann-Neben, G.; Gohl, K. (2010). Amundsen Sea drifts: indications for changing climate and oceanographic conditions. Geo-Temas 11: 175-176
In: Geo-Temas. Sociedad Geológica de España: Madrid. ISSN 1576-5172, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    West Antarctic Ice Sheet, Antarctic Bottom Water, sediment drifts, seismic reflection data, along-slope and down-slope sediment transport

Authors  Top 
  • Uenzelmann-Neben, G.
  • Gohl, K.

Abstract
    The analysis of seismic reflection data from the Amundsen Sea, southern Pacific Ocean reveals sediment drift formation already in Eocene/Oligocene times. This observation indicates bottom current activity and hence a cold climate for the late Paleogene in a area, which today lies under the influence of AABW originating in the Ross Sea. The creation of sediment drifts increased accompanied by the occurrence of debris flows leading to the identification of a phase of strong ice sheet extension, which then was followed by retreat of the grounding line during the last ~9 Ma.

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