The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records
We present pollen records from three sites in south Westland, New Zealand, that document past vegetation and inferred climate change between approximately 30,000 and 15,000 cal. yr BP. Detailed radiocarbon dating of the enclosing sediments at one of those sites, Galway tarn, provides a more robust c...
Published in: | Quaternary Science Reviews |
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Language: | English |
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2013
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Online Access: | https://pure.qub.ac.uk/en/publications/the-anatomy-of-last-glacial-maximum-climate-variations-in-south-westland-new-zealand-derived-from-pollen-records(a97930df-222b-424e-91b2-fa2aa7bf13d7).html https://doi.org/10.1016/j.quascirev.2013.04.015 http://www.scopus.com/inward/record.url?eid=2-s2.0-84879249239&partnerID=8YFLogxK |
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Open Polar |
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Queen's University Belfast Research Portal |
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ftqueensubelpubl |
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English |
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/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action Vandergoes, Marcus Newnham, Rewi M. Denton, George H. Blaauw, Maarten Barrell, David J.A. The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
description |
We present pollen records from three sites in south Westland, New Zealand, that document past vegetation and inferred climate change between approximately 30,000 and 15,000 cal. yr BP. Detailed radiocarbon dating of the enclosing sediments at one of those sites, Galway tarn, provides a more robust chronology for the structure and timing of climate-induced vegetation change than has previously been possible in this region. The Kawakawa/Oruanui tephra, a key isochronous marker, affords a precise stratigraphic link across all three pollen records, while other tie points are provided by key pollen-stratigraphic changes which appear to be synchronous across all three sites. Collectively, the records show three episodes in which grassland, interpreted as indicating mostly cold subalpine to alpine conditions, was prevalent in lowland south Westland, separated by phases dominated by subalpine shrubs and montane-lowland trees, indicating milder interstadial conditions. Dating, expressed as a Bayesian-estimated single 'best' age followed in parentheses by younger/older bounds of the 95% confidence modelled age range, indicates that a cold stadial episode, whose onset was marked by replacement of woodland by grassland, occurred between 28,730 (29,390-28,500) and 25,470 (26,090-25,270) cal. yr BP (years before AD, 1950), prior to the deposition of the Kawakawa/Oruanui tephra. Milder interstadial conditions prevailed between 25,470 (26,090-25,270) and 24,400 (24,840-24,120) cal. yr BP and between 22,630 (22,930-22,340) and 21,980 (22,210-21,580) cal. yr BP, separated by a return to cold stadial conditions between 24,400 and 22,630 cal. yr BP. A final episode of grass-dominated vegetation, indicating cold stadial conditions, occurred from 21,980 (22,210-21,580) to 18,490 (18,670-17,950) cal. yr BP. The decline in grass pollen, indicating progressive climate amelioration, was well advanced by 17,370 (17,730-17,110) cal. yr BP, indicating that the onset of the termination in south Westland occurred sometime between ca 18,490 and ca 17,370 cal. yr BP. A similar general pattern of stadials and interstadials is seen, to varying degrees of resolution but generally with lesser chronological control, in many other paleoclimate proxy records from the New Zealand region. This highly resolved chronology of vegetation changes from southwestern New Zealand contributes to the examination of past climate variations in the southwest Pacific region. The stadial and interstadial episodes defined by south Westland pollen records represent notable climate variability during the latter part of the Last Glaciation. Similar climatic patterns recorded farther afield, for example from Antarctica and the Southern Ocean, imply that climate variations during the latter part of the Last Glaciation and the transition to the Holocene interglacial were inter-regionally extensive in the Southern Hemisphere and thus important to understand in detail and to place into a global context. |
format |
Article in Journal/Newspaper |
author |
Vandergoes, Marcus Newnham, Rewi M. Denton, George H. Blaauw, Maarten Barrell, David J.A. |
author_facet |
Vandergoes, Marcus Newnham, Rewi M. Denton, George H. Blaauw, Maarten Barrell, David J.A. |
author_sort |
Vandergoes, Marcus |
title |
The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
title_short |
The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
title_full |
The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
title_fullStr |
The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
title_full_unstemmed |
The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records |
title_sort |
anatomy of last glacial maximum climate variations in south westland, new zealand, derived from pollen records |
publishDate |
2013 |
url |
https://pure.qub.ac.uk/en/publications/the-anatomy-of-last-glacial-maximum-climate-variations-in-south-westland-new-zealand-derived-from-pollen-records(a97930df-222b-424e-91b2-fa2aa7bf13d7).html https://doi.org/10.1016/j.quascirev.2013.04.015 http://www.scopus.com/inward/record.url?eid=2-s2.0-84879249239&partnerID=8YFLogxK |
geographic |
New Zealand Pacific Southern Ocean |
geographic_facet |
New Zealand Pacific Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
Vandergoes , M , Newnham , R M , Denton , G H , Blaauw , M & Barrell , D J A 2013 , ' The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records ' , Quaternary Science Reviews , vol. 74 , pp. 215-229 . https://doi.org/10.1016/j.quascirev.2013.04.015 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.04.015 |
container_title |
Quaternary Science Reviews |
container_volume |
74 |
container_start_page |
215 |
op_container_end_page |
229 |
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1766119578206732288 |
spelling |
ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/a97930df-222b-424e-91b2-fa2aa7bf13d7 2023-05-15T13:39:29+02:00 The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records Vandergoes, Marcus Newnham, Rewi M. Denton, George H. Blaauw, Maarten Barrell, David J.A. 2013-08-15 https://pure.qub.ac.uk/en/publications/the-anatomy-of-last-glacial-maximum-climate-variations-in-south-westland-new-zealand-derived-from-pollen-records(a97930df-222b-424e-91b2-fa2aa7bf13d7).html https://doi.org/10.1016/j.quascirev.2013.04.015 http://www.scopus.com/inward/record.url?eid=2-s2.0-84879249239&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Vandergoes , M , Newnham , R M , Denton , G H , Blaauw , M & Barrell , D J A 2013 , ' The anatomy of Last Glacial Maximum climate variations in south Westland, New Zealand, derived from pollen records ' , Quaternary Science Reviews , vol. 74 , pp. 215-229 . https://doi.org/10.1016/j.quascirev.2013.04.015 /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action article 2013 ftqueensubelpubl https://doi.org/10.1016/j.quascirev.2013.04.015 2022-02-09T22:10:21Z We present pollen records from three sites in south Westland, New Zealand, that document past vegetation and inferred climate change between approximately 30,000 and 15,000 cal. yr BP. Detailed radiocarbon dating of the enclosing sediments at one of those sites, Galway tarn, provides a more robust chronology for the structure and timing of climate-induced vegetation change than has previously been possible in this region. The Kawakawa/Oruanui tephra, a key isochronous marker, affords a precise stratigraphic link across all three pollen records, while other tie points are provided by key pollen-stratigraphic changes which appear to be synchronous across all three sites. Collectively, the records show three episodes in which grassland, interpreted as indicating mostly cold subalpine to alpine conditions, was prevalent in lowland south Westland, separated by phases dominated by subalpine shrubs and montane-lowland trees, indicating milder interstadial conditions. Dating, expressed as a Bayesian-estimated single 'best' age followed in parentheses by younger/older bounds of the 95% confidence modelled age range, indicates that a cold stadial episode, whose onset was marked by replacement of woodland by grassland, occurred between 28,730 (29,390-28,500) and 25,470 (26,090-25,270) cal. yr BP (years before AD, 1950), prior to the deposition of the Kawakawa/Oruanui tephra. Milder interstadial conditions prevailed between 25,470 (26,090-25,270) and 24,400 (24,840-24,120) cal. yr BP and between 22,630 (22,930-22,340) and 21,980 (22,210-21,580) cal. yr BP, separated by a return to cold stadial conditions between 24,400 and 22,630 cal. yr BP. A final episode of grass-dominated vegetation, indicating cold stadial conditions, occurred from 21,980 (22,210-21,580) to 18,490 (18,670-17,950) cal. yr BP. The decline in grass pollen, indicating progressive climate amelioration, was well advanced by 17,370 (17,730-17,110) cal. yr BP, indicating that the onset of the termination in south Westland occurred sometime between ca 18,490 and ca 17,370 cal. yr BP. A similar general pattern of stadials and interstadials is seen, to varying degrees of resolution but generally with lesser chronological control, in many other paleoclimate proxy records from the New Zealand region. This highly resolved chronology of vegetation changes from southwestern New Zealand contributes to the examination of past climate variations in the southwest Pacific region. The stadial and interstadial episodes defined by south Westland pollen records represent notable climate variability during the latter part of the Last Glaciation. Similar climatic patterns recorded farther afield, for example from Antarctica and the Southern Ocean, imply that climate variations during the latter part of the Last Glaciation and the transition to the Holocene interglacial were inter-regionally extensive in the Southern Hemisphere and thus important to understand in detail and to place into a global context. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Queen's University Belfast Research Portal New Zealand Pacific Southern Ocean Quaternary Science Reviews 74 215 229 |