The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago)
The latter part of the Last Glacial Interval (LGI; 60,000 to 11,700 years ago) experienced a range of climatic and environment extremes. To elucidate the mechanisms of these changes requires records of past variability that are precisely dated and correlated on the same absolute timescale. However,...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1153333 2023-05-15T16:29:53+02:00 The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) Turney, CSM Fifield, LK Hogg, AG Palmer, JG Hughen, K Baillie, MGL Galbraith, R Ogden, J Lorrey, A Tims, SG Jones, RT 2010-12 http://discovery.ucl.ac.uk/1153333/ unknown PERGAMON-ELSEVIER SCIENCE LTD QUATERNARY SCI REV , 29 (27-28) 3677 - 3682. (2010) TREE-RINGS RADIOCARBON CALIBRATION OXYGEN-ISOTOPE MASS-SPECTROMETRY C-14 CALIBRATION GREENLAND ICE SEA-LEVEL VARIABILITY RECORDS SCALE Article 2010 ftucl 2013-11-10T03:55:39Z The latter part of the Last Glacial Interval (LGI; 60,000 to 11,700 years ago) experienced a range of climatic and environment extremes. To elucidate the mechanisms of these changes requires records of past variability that are precisely dated and correlated on the same absolute timescale. However, despite decades of research, it is still not possible to align most marine and terrestrial records of past change with ice-core records, largely because of ongoing uncertainties over the conversion of pre-Holocene C-14 ages on to a calendar timescale and uncertainties with in ice-core chronologies. As a result, it is equivocal whether climate changes in both hemispheres during the LGI led, lagged or were synchronous with one another. A decadally-resolved radiocarbon calibration is urgently required to test these models of the Earth system. Here we report radiocarbon measurements obtained from subfossil New Zealand kauri (Agathis australis) spanning a collective 3500 years dated between 25,000 and 45,000 years ago. The results are compared to the recently published international calibration curve IntCal09 and to the marine Cariaco Basin datasets. We show that kauri have considerable potential for development of a Southern Hemisphere component of a unified global calibration curve suite, and that tree-ring sequences can be superposed on other radiocarbon records to constrain atmospheric marine offsets and precisely test the synchronicity of abrupt climate change. (C) 2010 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Greenland ice core University College London: UCL Discovery Greenland New Zealand |
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Open Polar |
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University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
TREE-RINGS RADIOCARBON CALIBRATION OXYGEN-ISOTOPE MASS-SPECTROMETRY C-14 CALIBRATION GREENLAND ICE SEA-LEVEL VARIABILITY RECORDS SCALE |
spellingShingle |
TREE-RINGS RADIOCARBON CALIBRATION OXYGEN-ISOTOPE MASS-SPECTROMETRY C-14 CALIBRATION GREENLAND ICE SEA-LEVEL VARIABILITY RECORDS SCALE Turney, CSM Fifield, LK Hogg, AG Palmer, JG Hughen, K Baillie, MGL Galbraith, R Ogden, J Lorrey, A Tims, SG Jones, RT The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
topic_facet |
TREE-RINGS RADIOCARBON CALIBRATION OXYGEN-ISOTOPE MASS-SPECTROMETRY C-14 CALIBRATION GREENLAND ICE SEA-LEVEL VARIABILITY RECORDS SCALE |
description |
The latter part of the Last Glacial Interval (LGI; 60,000 to 11,700 years ago) experienced a range of climatic and environment extremes. To elucidate the mechanisms of these changes requires records of past variability that are precisely dated and correlated on the same absolute timescale. However, despite decades of research, it is still not possible to align most marine and terrestrial records of past change with ice-core records, largely because of ongoing uncertainties over the conversion of pre-Holocene C-14 ages on to a calendar timescale and uncertainties with in ice-core chronologies. As a result, it is equivocal whether climate changes in both hemispheres during the LGI led, lagged or were synchronous with one another. A decadally-resolved radiocarbon calibration is urgently required to test these models of the Earth system. Here we report radiocarbon measurements obtained from subfossil New Zealand kauri (Agathis australis) spanning a collective 3500 years dated between 25,000 and 45,000 years ago. The results are compared to the recently published international calibration curve IntCal09 and to the marine Cariaco Basin datasets. We show that kauri have considerable potential for development of a Southern Hemisphere component of a unified global calibration curve suite, and that tree-ring sequences can be superposed on other radiocarbon records to constrain atmospheric marine offsets and precisely test the synchronicity of abrupt climate change. (C) 2010 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Turney, CSM Fifield, LK Hogg, AG Palmer, JG Hughen, K Baillie, MGL Galbraith, R Ogden, J Lorrey, A Tims, SG Jones, RT |
author_facet |
Turney, CSM Fifield, LK Hogg, AG Palmer, JG Hughen, K Baillie, MGL Galbraith, R Ogden, J Lorrey, A Tims, SG Jones, RT |
author_sort |
Turney, CSM |
title |
The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
title_short |
The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
title_full |
The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
title_fullStr |
The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
title_full_unstemmed |
The potential of New Zealand kauri (Agathis australis) for testing the synchronicity of abrupt climate change during the Last Glacial Interval (60,000-11,700 years ago) |
title_sort |
potential of new zealand kauri (agathis australis) for testing the synchronicity of abrupt climate change during the last glacial interval (60,000-11,700 years ago) |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2010 |
url |
http://discovery.ucl.ac.uk/1153333/ |
geographic |
Greenland New Zealand |
geographic_facet |
Greenland New Zealand |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
op_source |
QUATERNARY SCI REV , 29 (27-28) 3677 - 3682. (2010) |
_version_ |
1766019594689970176 |