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Sediment drifts in Lago Castor (Chilean Patagonia) reflect changes in the strength of the Southern Hemisphere Westerly winds since the Last Glacial Maximum Van Daele, M.; Vandoorne, W.; Bertrand, S.; Tanghe, N.; Meyer, I.; Moernaut, J.; Urrutia, R.; De Batist, M. (2014). Sediment drifts in Lago Castor (Chilean Patagonia) reflect changes in the strength of the Southern Hemisphere Westerly winds since the Last Glacial Maximum, in: Van Rooij, D. et al. (Ed.) Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69: pp. 131-132 In: Van Rooij, D.; Rüggeberg, A. (Ed.) (2014). Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69. Ghent University, Department of Geology and Soil Science/Flanders Marine Institute (VLIZ): Oostende. xviii, 152 pp. In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950

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Beschikbaar in	Auteurs
VLIZ: Open access 264115 [ download pdf ]
Documenttype: Samenvatting

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Trefwoorden

Geological time > Phanerozoic > Geological time > Cenozoic > Quaternary > Holocene Motion > Atmospheric motion > Winds > Planetary winds > Westerlies Chili [Marine Regions]; Southern Hemisphere Marien/Kust

Author keywords

Lake sediments

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Auteurs		Top
Van Daele, M. Vandoorne, W. Bertrand, S. Tanghe, N.	Meyer, I. Moernaut, J. Urrutia, R. De Batist, M.

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Abstract

Lago Castor (45.6°S; 71.8°W) is located within the postglacial pathway of the core of the Southern Hemisphere Westerly winds, which migrated from~42°S during the LGM to ~52°S at present. During two field expeditions (2009-2011) a network of high-resolution reflection-seismic profiles of the lake infill was acquired and a 15 m long composite sediment core was retrieved. The combination of the seismic stratigraphy and the sediment core lithology shows that the lower units were deposited in a proglacial environment, while the upper units (younger than 18.3 kyr BP) were influenced by bottom currents counteracting currents of surface waters driven by the Southern Hemisphere Westerlies. We conclude that sediment drifts constitute a good and relatively poorly investigated proxy for Westerly wind strength reconstructions.

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