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

Mauquoy, Dmitri, Blaauw, Maarten, van Geel, Bas, Borromei, Ana, Quattrocchio, Mirta, Chambers, Frank M ORCID: 0000-0002-0998-2093 and Possnert, Göran (2004) Late Holocene climatic changes in Tierra del Fuego based on multiproxy analyses of peat deposits. Quaternary Research, 61 (2). pp. 148-158. doi:10.1016/j.yqres.2003.10.001

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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.

Item Type: Article
Uncontrolled Keywords: Climate change; Tierra del Fuego; Sphagnum mires; 14C wiggle-match dating; Medieval Warm Period; Little Ice Age
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Schools and Research Institutes > School of Education and Science
Research Priority Areas: Place, Environment and Community
Depositing User: Anne Pengelly
Date Deposited: 06 Jan 2015 15:52
Last Modified: 31 Aug 2023 08:59

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