Multi-proxy, high resolution record of the Last Glacial Maximum in eastern Australia

Petherick, Lynda, McGowan, Hamish and Moss, Patrick (2010). Multi-proxy, high resolution record of the Last Glacial Maximum in eastern Australia. In: Australian Quaternary Association Biannual Conference, North Stradbroke Island, Qld, Australia, (). 11-16 July 2010.

Author Petherick, Lynda
McGowan, Hamish
Moss, Patrick
Title of paper Multi-proxy, high resolution record of the Last Glacial Maximum in eastern Australia
Conference name Australian Quaternary Association Biannual Conference
Conference location North Stradbroke Island, Qld, Australia
Conference dates 11-16 July 2010
Publisher Australasian Quaternary Association
Publication Year 2010
Sub-type Oral presentation
Language eng
Abstract/Summary A continuous, high resolution (average ca. 22 year) record encompassing the Last Glacial Maximum (LGM) has been developed using multiple proxies (aeolian sediment flux, grain size, pollen and charcoal) in lake sediment from Tortoise Lagoon (TOR), North Stradbroke Island, Queensland, Australia. The presence of Asteraceae tubilifloreae and spineless Asteraceae (common indicators of glacial conditions in Australia) at TOR indicates significantly cooler temperatures (mean annual temperature up to 6oC lower than today). Similarities between the vegetation at TOR during the LGM and that at temperate sites e.g. Caledonia Fen, Victoria (Kershaw et al. 2007), Redhead Lagoon, New South Wales (Williams et al. 2006) and Barrington Tops, New South Wales (Sweller and Martin 2001) suggests that this record reflects regional conditions across southeastern Australia. The TOR record also correlates well with that from nearby Native Companion Lagoon which suggests that the LGM was actually an extended period of ca. 8 – 10 kyr, characterised by 2 periods of 18 increased aridity (ca. 30 – 26.5 kyr and 21 – 19.5 kyr) (Petherick et al. 2008). A growing number of records from across the Southern Hemisphere e.g. New Zealand (Suggate and Almond 2003; Alloway et al. 2007; Newnham et al. 2007), Chile (Denton et al. 1999), Antarctica (Röthlisberger et al. 2002; EPICA 2006) and Australia (Smith 2009) also show evidence that the LGM encompassed a longer period of time than traditionally accepted, and was not uniformly cool and dry.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes #4.6 Abstracts: ORAL PRESENTATIONS

 
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Created: Mon, 28 Feb 2011, 15:16:16 EST by Associate Professor Hamish Mcgowan on behalf of School of Geography, Planning & Env Management