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Late Holocene climatic changes in Tierra del Fuego based on multiproxy analyses of peat deposits.

Published online by Cambridge University Press:  20 January 2017

Dmitri Mauquoy ,
Maarten Blaauw ,
Bas van Geel ,
Ana Borromei ,
Mirta Quattrocchio ,
Frank M. Chambers  and
Göran Possnert
Dmitri Mauquoy*
Affiliation:
Palaeobiology Program, Department of Earth Sciences, Uppsala University, Villavägen 16, SE-752 36 Uppsala, Sweden
Maarten Blaauw
Affiliation:
Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands
Bas van Geel
Affiliation:
Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands
Ana Borromei
Affiliation:
Departamento de Geologı́a, Universidad Nacional del Sur, San Juan 670 (8000), Bahı́a Blanca, Argentina
Mirta Quattrocchio
Affiliation:
Departamento de Geologı́a, Universidad Nacional del Sur, San Juan 670 (8000), Bahı́a Blanca, Argentina
Frank M. Chambers
Affiliation:
Centre for Environmental Change and Quaternary Research, GEMRU, University of Gloucestershire, Cheltenham GL50 4AZ, UK
Göran Possnert
Affiliation:
Ångström Laboratory, Division of Ion Physics, S-75121 Uppsala, Sweden
*
*Corresponding author. Fax: +31-20-525-7832.E-mail address:mauquoy@science.uva.nl (D. Mauquoy).
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Abstract

A ca. 1400-yr record from a raised bog in Isla Grande, Tierra del Fuego, Argentina, registers climate fluctuations, including a Medieval Warm Period, although evidence for the ‘Little Ice Age’ is less clear. Changes in temperature and/or precipitation were inferred from plant macrofossils, pollen, fungal spores, testate amebae, and peat humification. The chronology was established using a 14C wiggle-matching technique that provides improved age control for at least part of the record compared to other sites. These new data are presented and compared with other lines of evidence from the Southern and Northern Hemispheres. A period of low local water tables occurred in the bog between A.D. 960–1020, which may correspond to the Medieval Warm Period date range of A.D. 950–1045 generated from Northern Hemisphere tree-ring data. A period of cooler and/or wetter conditions was detected between ca. A.D. 1030 and 1100 and a later period of cooler/wetter conditions estimated at ca. cal A.D. 1800–1930, which may correspond to a cooling episode inferred from Law Dome, Antarctica.

Keywords

Climate changeTierra del FuegoSphagnum mires14C wiggle-match datingMedieval Warm PeriodLittle Ice Age
Type
Research Article
Information
Quaternary Research , Volume 61 , Issue 2 , March 2004 , pp. 148 - 158
Copyright
University of Washington

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