Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation
The stable isotope records of four stalagmites dated by 19 TIMS uranium series ages are combined to produce master chronologies for delta(18)O and delta(13)C The delta(18)O records display good overall coherence, but considerable variation in detail. Variability in the delta(13)C records is greater,...
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Language: | English |
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2004
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:73809 2023-05-15T13:54:41+02:00 Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation Williams, P. W. King, D. N. T. Zhao, J. X. Collerson, K. D. 2004-01-01 https://espace.library.uq.edu.au/view/UQ:73809 eng eng Hodder Arnold Journals doi:10.1191/0959683604hl676rp issn:0959-6836 orcid:0000-0002-2413-6178 Geography Physical Geosciences Multidisciplinary Caves Climatic Change Palaeoclimate Periodicities Speleothems Stable Isotopes Holocene New Zealand Atmospheric Co2 Concentration Carbon-isotope Composition Southwest Pacific-ocean Last Glacial Maximum Stable-isotope Ice-core Paleotemperature Record Climate Variability Oxygen-isotope Organic-matter 260301 Geochronology and Isotope Geochemistry C1 Journal Article 2004 ftunivqespace https://doi.org/10.1191/0959683604hl676rp 2020-09-21T22:30:19Z The stable isotope records of four stalagmites dated by 19 TIMS uranium series ages are combined to produce master chronologies for delta(18)O and delta(13)C The delta(18)O records display good overall coherence, but considerable variation in detail. Variability in the delta(13)C records is greater, but general trends can still be discerned. This implies that too fine an interpretation of the structure of individual isotopic records can be unreliable. Speleothem delta(18)O values are demonstrated to show a positive relationship with temperature by comparing trends with other proxy records, but also to respond negatively to rainfall amount. Speleothem delta(13)C is considered to be most influenced by rainfall. The postglacial thermal optimum occur-red around 10.8 ka BP, which is similar in timing to Antarctica but up to 2000 years earlier than most Northern Hemisphere sites. Increasingly negative delta(18)O values after 7.5 ka BP indicate that temperatures declined to a late mid-Holocene minimum centred around 3 ka BP, but more positive values followed to mark a warm peak about 750 years ago which coincided with the 'Mediaeval Warm Period' of Europe. Low 5110 values at 325 years BP suggest cooling coincident with the 'Little Ice Age'. A marked feature of the delta(13)C record is an asymmetric periodicity averaging c. 2250 years and amplitude of c. 1.9parts per thousand. It is concluded that this is mainly driven by waterbalance variations with negative swings representing particularly wet intervals. The 5110 record shows a higher-frequency cyclicity with a period of c. 500 years and an amplitude of c. 0.25 parts per thousand. This is most likely to be temperature-driven, but some swings may have been amplified by precipitation. Article in Journal/Newspaper Antarc* Antarctica ice core The University of Queensland: UQ eSpace Pacific New Zealand The Holocene 14 2 194 208 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Geography Physical Geosciences Multidisciplinary Caves Climatic Change Palaeoclimate Periodicities Speleothems Stable Isotopes Holocene New Zealand Atmospheric Co2 Concentration Carbon-isotope Composition Southwest Pacific-ocean Last Glacial Maximum Stable-isotope Ice-core Paleotemperature Record Climate Variability Oxygen-isotope Organic-matter 260301 Geochronology and Isotope Geochemistry C1 |
spellingShingle |
Geography Physical Geosciences Multidisciplinary Caves Climatic Change Palaeoclimate Periodicities Speleothems Stable Isotopes Holocene New Zealand Atmospheric Co2 Concentration Carbon-isotope Composition Southwest Pacific-ocean Last Glacial Maximum Stable-isotope Ice-core Paleotemperature Record Climate Variability Oxygen-isotope Organic-matter 260301 Geochronology and Isotope Geochemistry C1 Williams, P. W. King, D. N. T. Zhao, J. X. Collerson, K. D. Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
topic_facet |
Geography Physical Geosciences Multidisciplinary Caves Climatic Change Palaeoclimate Periodicities Speleothems Stable Isotopes Holocene New Zealand Atmospheric Co2 Concentration Carbon-isotope Composition Southwest Pacific-ocean Last Glacial Maximum Stable-isotope Ice-core Paleotemperature Record Climate Variability Oxygen-isotope Organic-matter 260301 Geochronology and Isotope Geochemistry C1 |
description |
The stable isotope records of four stalagmites dated by 19 TIMS uranium series ages are combined to produce master chronologies for delta(18)O and delta(13)C The delta(18)O records display good overall coherence, but considerable variation in detail. Variability in the delta(13)C records is greater, but general trends can still be discerned. This implies that too fine an interpretation of the structure of individual isotopic records can be unreliable. Speleothem delta(18)O values are demonstrated to show a positive relationship with temperature by comparing trends with other proxy records, but also to respond negatively to rainfall amount. Speleothem delta(13)C is considered to be most influenced by rainfall. The postglacial thermal optimum occur-red around 10.8 ka BP, which is similar in timing to Antarctica but up to 2000 years earlier than most Northern Hemisphere sites. Increasingly negative delta(18)O values after 7.5 ka BP indicate that temperatures declined to a late mid-Holocene minimum centred around 3 ka BP, but more positive values followed to mark a warm peak about 750 years ago which coincided with the 'Mediaeval Warm Period' of Europe. Low 5110 values at 325 years BP suggest cooling coincident with the 'Little Ice Age'. A marked feature of the delta(13)C record is an asymmetric periodicity averaging c. 2250 years and amplitude of c. 1.9parts per thousand. It is concluded that this is mainly driven by waterbalance variations with negative swings representing particularly wet intervals. The 5110 record shows a higher-frequency cyclicity with a period of c. 500 years and an amplitude of c. 0.25 parts per thousand. This is most likely to be temperature-driven, but some swings may have been amplified by precipitation. |
format |
Article in Journal/Newspaper |
author |
Williams, P. W. King, D. N. T. Zhao, J. X. Collerson, K. D. |
author_facet |
Williams, P. W. King, D. N. T. Zhao, J. X. Collerson, K. D. |
author_sort |
Williams, P. W. |
title |
Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
title_short |
Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
title_full |
Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
title_fullStr |
Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
title_full_unstemmed |
Speleothem master chronologies: combined Holocene O-18 and C-13 records from the North Island of New Zealand and their palaeoenvironmental interpretation |
title_sort |
speleothem master chronologies: combined holocene o-18 and c-13 records from the north island of new zealand and their palaeoenvironmental interpretation |
publisher |
Hodder Arnold Journals |
publishDate |
2004 |
url |
https://espace.library.uq.edu.au/view/UQ:73809 |
geographic |
Pacific New Zealand |
geographic_facet |
Pacific New Zealand |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
doi:10.1191/0959683604hl676rp issn:0959-6836 orcid:0000-0002-2413-6178 |
op_doi |
https://doi.org/10.1191/0959683604hl676rp |
container_title |
The Holocene |
container_volume |
14 |
container_issue |
2 |
container_start_page |
194 |
op_container_end_page |
208 |
_version_ |
1766260767570526208 |