A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics
There are few continuous Australian palaeoclimate records that extend beyond the Last Glacial Maximum (LGM), meaning that knowledge of regional climates before, during and after this period is limited. Understanding late-Pleistocene climates of the subtropics is important because of the fundamental...
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ftqueensland:oai:eprints.qut.edu.au:250981 2024-09-15T17:48:06+00:00 A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics Barr, Cameron Tibby, John Moss, Patrick T. Halverson, Galen P. Marshall, Jonathan C. McGregor, Glenn B. Stirling, Erinne 2017-08-25 https://eprints.qut.edu.au/250981/ unknown Elsevier Ltd. doi:10.1016/j.quaint.2017.04.011 Barr, Cameron, Tibby, John, Moss, Patrick T., Halverson, Galen P., Marshall, Jonathan C., McGregor, Glenn B., & Stirling, Erinne (2017) A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics. Quaternary International, 449, pp. 106-118. https://eprints.qut.edu.au/250981/ 2017 Elsevier Ltd and INQUA This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Quaternary International Australia Deglaciation Glacial maximum Palaeoclimates Subtropics Contribution to Journal 2017 ftqueensland https://doi.org/10.1016/j.quaint.2017.04.011 2024-07-30T23:51:00Z There are few continuous Australian palaeoclimate records that extend beyond the Last Glacial Maximum (LGM), meaning that knowledge of regional climates before, during and after this period is limited. Understanding late-Pleistocene climates of the subtropics is important because of the fundamental role the region plays in the large-scale, global transfer of energy from low latitudes. Palaeoclimate studies of subtropical regions can help define the extent of warming/cooling during the large global climatic events which characterise the late-Pleistocene. Here we report the results from a multi-proxy analysis of a sediment record from Welsby Lagoon on North Stradbroke Island, in the eastern Australian subtropics, spanning the past ca. 25,000 years. Stable C and N isotope analysis and high resolution contiguous records of macrocharcoal deposition and sediment organic content are interpreted in conjunction with a previously published pollen record. Sediment organic content displayed a very strong correlation with total organic carbon (TOC) content as determined through elemental analysis and, given the peaty nature of the sediment, is interpreted as indicative of moisture balance. The proxies reflect wet subtropical climates in the lead up to the LGM which led to an expansion of the wetland. This was followed by a cool, dry and windy LGM (ca. 22.3–19.7'000 years before present; kyr BP), which was punctuated by a brief wet phase ca. 21.7–20.4 kyr BP. A salient feature of the deglacial period is a rapid increase in TOC around 15 kyr BP, coincident with the Antarctic Cold Reversal and Bølling-Allerød warm phase. Increased fire frequency is evident in the Holocene, which is characterised by otherwise stable climate and vegetation. This study supports the notion of variable climates during the LGM and finds an onset of deglacial warming in the Australian subtropics that predates the Holocene. Article in Journal/Newspaper Antarc* Antarctic Queensland University of Technology: QUT ePrints Quaternary International 449 106 118 |
institution |
Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
topic |
Australia Deglaciation Glacial maximum Palaeoclimates Subtropics |
spellingShingle |
Australia Deglaciation Glacial maximum Palaeoclimates Subtropics Barr, Cameron Tibby, John Moss, Patrick T. Halverson, Galen P. Marshall, Jonathan C. McGregor, Glenn B. Stirling, Erinne A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
topic_facet |
Australia Deglaciation Glacial maximum Palaeoclimates Subtropics |
description |
There are few continuous Australian palaeoclimate records that extend beyond the Last Glacial Maximum (LGM), meaning that knowledge of regional climates before, during and after this period is limited. Understanding late-Pleistocene climates of the subtropics is important because of the fundamental role the region plays in the large-scale, global transfer of energy from low latitudes. Palaeoclimate studies of subtropical regions can help define the extent of warming/cooling during the large global climatic events which characterise the late-Pleistocene. Here we report the results from a multi-proxy analysis of a sediment record from Welsby Lagoon on North Stradbroke Island, in the eastern Australian subtropics, spanning the past ca. 25,000 years. Stable C and N isotope analysis and high resolution contiguous records of macrocharcoal deposition and sediment organic content are interpreted in conjunction with a previously published pollen record. Sediment organic content displayed a very strong correlation with total organic carbon (TOC) content as determined through elemental analysis and, given the peaty nature of the sediment, is interpreted as indicative of moisture balance. The proxies reflect wet subtropical climates in the lead up to the LGM which led to an expansion of the wetland. This was followed by a cool, dry and windy LGM (ca. 22.3–19.7'000 years before present; kyr BP), which was punctuated by a brief wet phase ca. 21.7–20.4 kyr BP. A salient feature of the deglacial period is a rapid increase in TOC around 15 kyr BP, coincident with the Antarctic Cold Reversal and Bølling-Allerød warm phase. Increased fire frequency is evident in the Holocene, which is characterised by otherwise stable climate and vegetation. This study supports the notion of variable climates during the LGM and finds an onset of deglacial warming in the Australian subtropics that predates the Holocene. |
format |
Article in Journal/Newspaper |
author |
Barr, Cameron Tibby, John Moss, Patrick T. Halverson, Galen P. Marshall, Jonathan C. McGregor, Glenn B. Stirling, Erinne |
author_facet |
Barr, Cameron Tibby, John Moss, Patrick T. Halverson, Galen P. Marshall, Jonathan C. McGregor, Glenn B. Stirling, Erinne |
author_sort |
Barr, Cameron |
title |
A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
title_short |
A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
title_full |
A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
title_fullStr |
A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
title_full_unstemmed |
A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics |
title_sort |
25,000-year record of environmental change from welsby lagoon, north stradbroke island, in the australian subtropics |
publisher |
Elsevier Ltd. |
publishDate |
2017 |
url |
https://eprints.qut.edu.au/250981/ |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Quaternary International |
op_relation |
doi:10.1016/j.quaint.2017.04.011 Barr, Cameron, Tibby, John, Moss, Patrick T., Halverson, Galen P., Marshall, Jonathan C., McGregor, Glenn B., & Stirling, Erinne (2017) A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics. Quaternary International, 449, pp. 106-118. https://eprints.qut.edu.au/250981/ |
op_rights |
2017 Elsevier Ltd and INQUA This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1016/j.quaint.2017.04.011 |
container_title |
Quaternary International |
container_volume |
449 |
container_start_page |
106 |
op_container_end_page |
118 |
_version_ |
1810289133845741568 |