Glacial and Holocene terrestrial temperature variability in subtropical east Australia as inferred from branched GDGT distributions in a sediment core from Lake McKenzie
MetadataShow full item record
Branched glycerol dialkyl glycerol tetraether (GDGT) distributions observed in a sediment core from Lake McKenzie were utilized to quantitatively reconstruct the pattern of mean annual air temperature (MAAT) from coastal subtropical eastern Australia between 37 and 18.3 cal ka BP and 14.0 cal ka BP to present. Both the reconstructed trend and amplitude of MAAT changes from the top of the sediment core were nearly identical to a local instrumental MAAT record from Fraser Island, providing confidence that in this sediment core branched GDGTs could be used to produce a quantitative record of past MAAT. The reconstructed trend of MAAT during 37 to 18.3 cal ka BP and timing of the Last Glacial Maximum (LGM) in the Lake McKenzie record were in agreement with previously published nearby marine climate records. The amplitude of lower-than-present MAAT during the LGM potentially provides information on the latitude of separation of the Tasman Front from the East Australian current in the subtropical western Pacific. The Lake McKenzie record shows an earlier onset of near modern day warm temperatures in the early Holocene compared to marine records and the presence of a warmer than present day period during the mid-Holocene.
NOTICE: this is the author’s version of a work that was accepted for publication in Quaternary Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Quaternary Research, Vol. 82, No. 1 (2014). DOI: 10.1016/j.yqres.2014.02.005
Showing items related by title, author, creator and subject.
Sources of glycerol dialkyl glycerol tetraethers (GDGTs) in catchment soils, water column and sediments of Lake Rotsee (Switzerland) – Implications for the application of GDGT-based proxies for lakesNaeher, Sebastian; Peterse, F.; Smittenberg, R.; Niemann, H.; Zigah, P.; Schubert, C. (2014)We analysed glycerol dialkyl glycerol tetraether (GDGT) distributions in the water column, sediment and catchment soils of the Swiss Lake Rotsee to determine the sources of GDGTs in the lake sediment and to determine the ...
Olafsdottir, S.; Geirsdottir, A.; Miller, Gifford; Stoner, J.; Channell, J. (2013)High sediment accumulation rates in lacustrine and shallowmarine archives around Iceland offer the potential to compare highresolution paleoclimatic reconstructions from terrestrial and marinearchives; however, direct ...
Abrupt Holocene climate transitions in the northern North Atlantic region recorded by synchronized lacustrine records in IcelandGeirsdottir, A.; Miller, Gifford; Larsen, D.; Olafsdottir, S. (2013)Two high-sediment-accumulation-rate Icelandic lakes, the glacial lake Hvítárvatn and the non-glaciallake Haukadalsvatn, contain numerous tephra layers of known age, which together with highresolutionpaleomagnetic secular ...