A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand
We present the first continuous paleolimnological reconstruction from the North Island of New Zealand (37A degrees S) that spans the last 48.2 cal kyr. A tephra- and radiocarbon-based chronology was developed to infer the timing of marked paleolimnological changes in Lake Pupuke, Auckland, New Zeala...
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ftulundlup:oai:lup.lub.lu.se:832cf1db-f7f0-46c4-a007-645c938d81f4 2023-05-15T13:48:54+02:00 A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand Stephens, Thomas Atkin, Daniel Augustinus, Paul Shane, Philip Lorrey, Andrew Street-Perrott, Alayne Nilsson, Andreas Snowball, Ian 2012 https://lup.lub.lu.se/record/3243093 https://doi.org/10.1007/s10933-012-9644-z eng eng Springer https://lup.lub.lu.se/record/3243093 http://dx.doi.org/10.1007/s10933-012-9644-z wos:000311395000008 scopus:84869879665 Journal of Paleolimnology; 48(4), pp 785-800 (2012) ISSN: 0921-2728 Geology Climate and environmental change Antarctic teleconnection Seasonality Elemental flux Stable isotope Erosion Biological productivity Mixing contributiontojournal/article info:eu-repo/semantics/article text 2012 ftulundlup https://doi.org/10.1007/s10933-012-9644-z 2023-02-01T23:27:05Z We present the first continuous paleolimnological reconstruction from the North Island of New Zealand (37A degrees S) that spans the last 48.2 cal kyr. A tephra- and radiocarbon-based chronology was developed to infer the timing of marked paleolimnological changes in Lake Pupuke, Auckland, New Zealand, identified using sedimentology, magnetic susceptibility, grain size and geochemistry (carbon, nitrogen and sulphur concentrations and fluxes, carbon and nitrogen stable isotopes). Variable erosional influx, biomass and benthic REDOX conditions are linked to changing effective precipitation and seasonality within three inferred broad intervals of climatic change: (1) the Last Glacial Coldest Phase (LGCP) of reduced effective precipitation and cooler temperatures, from 28.8 to 18.0 cal kyr BP, (2) the Last Glacial Interglacial Transition (LGIT) of increasing effective precipitation and warmer conditions, from 18.0 to 10.2 cal kyr BP, and (3) a Holocene interval of high effective precipitation, beginning with a warm period of limited seasonality from 10.2 cal kyr BP and followed by increasing seasonality from 7.6 cal kyr BP. The LGCP and LGIT also contain millennial-scale climate events, including the coldest inferred glacial conditions during the LGCP from 27.8 to 26.0 and 22.0-19.0 cal kyr BP, and a climate reversal in the LGIT associated with lower lake level, from 14.5 to 13.8 cal kyr BP, coeval with the Antarctic Cold Reversal. The onset of seasonal thermal stratification occurred at 5.7 cal kyr BP and was linked to natural eutrophication of Lake Pupuke, which produced enhanced organic sedimentation. Article in Journal/Newspaper Antarc* Antarctic Lund University Publications (LUP) Antarctic Lower Lake ENVELOPE(-129.290,-129.290,53.428,53.428) New Zealand The Antarctic Journal of Paleolimnology 48 4 785 800 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Climate and environmental change Antarctic teleconnection Seasonality Elemental flux Stable isotope Erosion Biological productivity Mixing |
spellingShingle |
Geology Climate and environmental change Antarctic teleconnection Seasonality Elemental flux Stable isotope Erosion Biological productivity Mixing Stephens, Thomas Atkin, Daniel Augustinus, Paul Shane, Philip Lorrey, Andrew Street-Perrott, Alayne Nilsson, Andreas Snowball, Ian A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
topic_facet |
Geology Climate and environmental change Antarctic teleconnection Seasonality Elemental flux Stable isotope Erosion Biological productivity Mixing |
description |
We present the first continuous paleolimnological reconstruction from the North Island of New Zealand (37A degrees S) that spans the last 48.2 cal kyr. A tephra- and radiocarbon-based chronology was developed to infer the timing of marked paleolimnological changes in Lake Pupuke, Auckland, New Zealand, identified using sedimentology, magnetic susceptibility, grain size and geochemistry (carbon, nitrogen and sulphur concentrations and fluxes, carbon and nitrogen stable isotopes). Variable erosional influx, biomass and benthic REDOX conditions are linked to changing effective precipitation and seasonality within three inferred broad intervals of climatic change: (1) the Last Glacial Coldest Phase (LGCP) of reduced effective precipitation and cooler temperatures, from 28.8 to 18.0 cal kyr BP, (2) the Last Glacial Interglacial Transition (LGIT) of increasing effective precipitation and warmer conditions, from 18.0 to 10.2 cal kyr BP, and (3) a Holocene interval of high effective precipitation, beginning with a warm period of limited seasonality from 10.2 cal kyr BP and followed by increasing seasonality from 7.6 cal kyr BP. The LGCP and LGIT also contain millennial-scale climate events, including the coldest inferred glacial conditions during the LGCP from 27.8 to 26.0 and 22.0-19.0 cal kyr BP, and a climate reversal in the LGIT associated with lower lake level, from 14.5 to 13.8 cal kyr BP, coeval with the Antarctic Cold Reversal. The onset of seasonal thermal stratification occurred at 5.7 cal kyr BP and was linked to natural eutrophication of Lake Pupuke, which produced enhanced organic sedimentation. |
format |
Article in Journal/Newspaper |
author |
Stephens, Thomas Atkin, Daniel Augustinus, Paul Shane, Philip Lorrey, Andrew Street-Perrott, Alayne Nilsson, Andreas Snowball, Ian |
author_facet |
Stephens, Thomas Atkin, Daniel Augustinus, Paul Shane, Philip Lorrey, Andrew Street-Perrott, Alayne Nilsson, Andreas Snowball, Ian |
author_sort |
Stephens, Thomas |
title |
A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
title_short |
A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
title_full |
A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
title_fullStr |
A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
title_full_unstemmed |
A late glacial Antarctic climate teleconnection and variable Holocene seasonality at Lake Pupuke, Auckland, New Zealand |
title_sort |
late glacial antarctic climate teleconnection and variable holocene seasonality at lake pupuke, auckland, new zealand |
publisher |
Springer |
publishDate |
2012 |
url |
https://lup.lub.lu.se/record/3243093 https://doi.org/10.1007/s10933-012-9644-z |
long_lat |
ENVELOPE(-129.290,-129.290,53.428,53.428) |
geographic |
Antarctic Lower Lake New Zealand The Antarctic |
geographic_facet |
Antarctic Lower Lake New Zealand The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Journal of Paleolimnology; 48(4), pp 785-800 (2012) ISSN: 0921-2728 |
op_relation |
https://lup.lub.lu.se/record/3243093 http://dx.doi.org/10.1007/s10933-012-9644-z wos:000311395000008 scopus:84869879665 |
op_doi |
https://doi.org/10.1007/s10933-012-9644-z |
container_title |
Journal of Paleolimnology |
container_volume |
48 |
container_issue |
4 |
container_start_page |
785 |
op_container_end_page |
800 |
_version_ |
1766249936511303680 |