Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia
Lake sediments can be sensitive recorders of environmental change on glacial-interglacial timescales; however, they are notoriously challenging to date. Here we present new chronological results of two lake sediment cores from western Tasmania (Australia) covering several glacial cycles: Lake Selina...
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/02ff4e6f-885a-4ca0-aebd-a43af2ff3408 2024-05-12T07:53:42+00:00 Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia Lise-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Heslop, David Blaauw, Maarten 2019-12-09 https://pure.qub.ac.uk/en/publications/02ff4e6f-885a-4ca0-aebd-a43af2ff3408 https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/528712 eng eng https://pure.qub.ac.uk/en/publications/02ff4e6f-885a-4ca0-aebd-a43af2ff3408 info:eu-repo/semantics/openAccess Lise-Pronovost , A , Fletcher , M-S , Simon , Q , Jacobs , Z , Heslop , D & Blaauw , M 2019 , ' Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia ' , American Geophysical Union Fall Meeting 2019 , San Francisco , United States , 09/12/2019 - 13/12/2019 . < https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/528712 > /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action conferenceObject 2019 ftqueensubelpubl 2024-04-17T23:59:51Z Lake sediments can be sensitive recorders of environmental change on glacial-interglacial timescales; however, they are notoriously challenging to date. Here we present new chronological results of two lake sediment cores from western Tasmania (Australia) covering several glacial cycles: Lake Selina (5.5 m– ca. 265 ka) and Darwin Crater (61 m – ca. 800 ka). We aim to combine these two records within a common chronological framework to construct the longest continuous continental paleoclimate record from Australia. To do so, we employed absolute dating methods, including radiocarbon ( 14 C) and optically stimulated luminescence (OSL) dating, together with paleomagnetic and climatic correlations. Absolute dating methods were successfully applied to the uppermost and most recent part of the records. We find remarkable similarities at the millennial scale between Tasmanian lakes and Antarctic ice core climate records and we are exploring if shorter-term climate events could be shared between both records and thus used as additional relative dating points. We use two complementary geomagnetic field strength proxies, relative paleointensity (RPI) and atmospheric 10 Be cosmogenic radionuclides, to independently constrain the chronology within reliable intervals where environmental biases are minimal. Conference Object Antarc* Antarctic ice core Queen's University Belfast Research Portal Antarctic |
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Queen's University Belfast Research Portal |
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English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Lise-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Heslop, David Blaauw, Maarten Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Lake sediments can be sensitive recorders of environmental change on glacial-interglacial timescales; however, they are notoriously challenging to date. Here we present new chronological results of two lake sediment cores from western Tasmania (Australia) covering several glacial cycles: Lake Selina (5.5 m– ca. 265 ka) and Darwin Crater (61 m – ca. 800 ka). We aim to combine these two records within a common chronological framework to construct the longest continuous continental paleoclimate record from Australia. To do so, we employed absolute dating methods, including radiocarbon ( 14 C) and optically stimulated luminescence (OSL) dating, together with paleomagnetic and climatic correlations. Absolute dating methods were successfully applied to the uppermost and most recent part of the records. We find remarkable similarities at the millennial scale between Tasmanian lakes and Antarctic ice core climate records and we are exploring if shorter-term climate events could be shared between both records and thus used as additional relative dating points. We use two complementary geomagnetic field strength proxies, relative paleointensity (RPI) and atmospheric 10 Be cosmogenic radionuclides, to independently constrain the chronology within reliable intervals where environmental biases are minimal. |
format |
Conference Object |
author |
Lise-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Heslop, David Blaauw, Maarten |
author_facet |
Lise-Pronovost, Agathe Fletcher, Michael-Shawn Simon, Quentin Jacobs, Zenobia Heslop, David Blaauw, Maarten |
author_sort |
Lise-Pronovost, Agathe |
title |
Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
title_short |
Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
title_full |
Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
title_fullStr |
Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
title_full_unstemmed |
Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia |
title_sort |
chronostratigraphy of long lacustrine sedimentary records from tasmania, australia |
publishDate |
2019 |
url |
https://pure.qub.ac.uk/en/publications/02ff4e6f-885a-4ca0-aebd-a43af2ff3408 https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/528712 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_source |
Lise-Pronovost , A , Fletcher , M-S , Simon , Q , Jacobs , Z , Heslop , D & Blaauw , M 2019 , ' Chronostratigraphy of long lacustrine sedimentary records from Tasmania, Australia ' , American Geophysical Union Fall Meeting 2019 , San Francisco , United States , 09/12/2019 - 13/12/2019 . < https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/528712 > |
op_relation |
https://pure.qub.ac.uk/en/publications/02ff4e6f-885a-4ca0-aebd-a43af2ff3408 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1798844081639522304 |