Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis
During the last glacial period (ca. 120–11 kyr BP), dramatic temperature swings, known as Dansgaard–Oeschger (D–O) events, are clearly manifest in high-resolution oxygen isotope records from the Greenland Ice Sheet. Although variability in the Atlantic Meridional Overturning Circulation (AMOC) is of...
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ftdoajarticles:oai:doaj.org/article:60ec8487e185407ca9800e2d7510f2bb 2023-05-15T16:28:06+02:00 Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis H. Nye A. Condron 2021-06-01T00:00:00Z https://doi.org/10.5194/cp-17-1409-2021 https://doaj.org/article/60ec8487e185407ca9800e2d7510f2bb EN eng Copernicus Publications https://cp.copernicus.org/articles/17/1409/2021/cp-17-1409-2021.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-17-1409-2021 1814-9324 1814-9332 https://doaj.org/article/60ec8487e185407ca9800e2d7510f2bb Climate of the Past, Vol 17, Pp 1409-1421 (2021) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2021 ftdoajarticles https://doi.org/10.5194/cp-17-1409-2021 2022-12-31T13:18:27Z During the last glacial period (ca. 120–11 kyr BP), dramatic temperature swings, known as Dansgaard–Oeschger (D–O) events, are clearly manifest in high-resolution oxygen isotope records from the Greenland Ice Sheet. Although variability in the Atlantic Meridional Overturning Circulation (AMOC) is often invoked, a unified explanation for what caused these “sawtooth-shaped” climate patterns has yet to be accepted. Of particular interest is the most recent D–O-shaped climate pattern that occurred from ∼ 14 600 to 11 500 years ago – the Bølling–Allerød (BA) warm interstadial and the subsequent Younger Dryas (YD) cold stadial. Unlike earlier D–O stadials, the YD is frequently considered a unique event, potentially resulting from a rerouting and/or flood of glacial meltwater into the North Atlantic or a meteorite impact. Yet, these mechanisms are less frequently considered as the cause of the earlier stadials. Using a robust multivariate outlier detection scheme – a novel approach for traditional paleoclimate research – we show that the pattern of climate change during the BA/YD is not statistically different from the other D–O events in the Greenland record and that it should not necessarily be considered unique when investigating the drivers of abrupt climate change. In so doing, our results present a novel statistical framework for paleoclimatic data analysis. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic Directory of Open Access Journals: DOAJ Articles Greenland Climate of the Past 17 3 1409 1421 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 H. Nye A. Condron Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
During the last glacial period (ca. 120–11 kyr BP), dramatic temperature swings, known as Dansgaard–Oeschger (D–O) events, are clearly manifest in high-resolution oxygen isotope records from the Greenland Ice Sheet. Although variability in the Atlantic Meridional Overturning Circulation (AMOC) is often invoked, a unified explanation for what caused these “sawtooth-shaped” climate patterns has yet to be accepted. Of particular interest is the most recent D–O-shaped climate pattern that occurred from ∼ 14 600 to 11 500 years ago – the Bølling–Allerød (BA) warm interstadial and the subsequent Younger Dryas (YD) cold stadial. Unlike earlier D–O stadials, the YD is frequently considered a unique event, potentially resulting from a rerouting and/or flood of glacial meltwater into the North Atlantic or a meteorite impact. Yet, these mechanisms are less frequently considered as the cause of the earlier stadials. Using a robust multivariate outlier detection scheme – a novel approach for traditional paleoclimate research – we show that the pattern of climate change during the BA/YD is not statistically different from the other D–O events in the Greenland record and that it should not necessarily be considered unique when investigating the drivers of abrupt climate change. In so doing, our results present a novel statistical framework for paleoclimatic data analysis. |
format |
Article in Journal/Newspaper |
author |
H. Nye A. Condron |
author_facet |
H. Nye A. Condron |
author_sort |
H. Nye |
title |
Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
title_short |
Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
title_full |
Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
title_fullStr |
Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
title_full_unstemmed |
Assessing the statistical uniqueness of the Younger Dryas: a robust multivariate analysis |
title_sort |
assessing the statistical uniqueness of the younger dryas: a robust multivariate analysis |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-1409-2021 https://doaj.org/article/60ec8487e185407ca9800e2d7510f2bb |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic |
genre_facet |
Greenland Ice Sheet North Atlantic |
op_source |
Climate of the Past, Vol 17, Pp 1409-1421 (2021) |
op_relation |
https://cp.copernicus.org/articles/17/1409/2021/cp-17-1409-2021.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-17-1409-2021 1814-9324 1814-9332 https://doaj.org/article/60ec8487e185407ca9800e2d7510f2bb |
op_doi |
https://doi.org/10.5194/cp-17-1409-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
3 |
container_start_page |
1409 |
op_container_end_page |
1421 |
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1766017730572451840 |