Late Holocene climatic changes in Tierra del Fuego based on multi-proxy analyses of peat deposits

Dmitri Mauquoy, M. Blaauw, B. Van Geel, F. M. Chambers, G. Possnert, A. Borromei

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70 Citations (Scopus)

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 C-14 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 I 100 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. (C) 2004 University of Washington. All rights reserved.

Original languageEnglish
Pages (from-to)148-158
Number of pages10
JournalQuaternary Research
Volume61
DOIs
Publication statusPublished - Mar 2004

Keywords

  • climate change
  • Tierra del Fuego
  • Sphagnum mires
  • C-14 wiggle-match dating
  • Medieval Warm Period
  • Little Ice Age
  • SOUTHERNMOST SOUTH-AMERICA
  • MEDIEVAL WARM PERIOD
  • TREE-RING
  • ORGANIC DEPOSITS
  • BOG
  • QUATERNARY
  • RECORDS
  • POLLEN
  • PALEOCLIMATE
  • VEGETATION

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