Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period
Abstract. The last glacial period is characterized by a number of millennial climate events that have been identified in both Greenland and Antarctic ice cores and that are abrupt in Greenland climate records. The mechanisms governing this climate variability remain a puzzle that requires a precise...
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ftzenodo:oai:zenodo.org:4585864 2024-09-15T17:42:23+00:00 Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period Anders Svensson Dorthe Dahl-Jensen Physics of Ice Climate Earth Niels Bohr Institute University of Copenhagen Copenhagen Denmark Thomas Blunier Sune O. Rasmussen Bo M. Vinther Paul Vallelonga Emilie Capron Vasileios Gkinis Eliza Cook Helle Astrid Kjær Raimund Muscheler Sepp Kipfstuhl Frank Wilhelms Thomas F. Stocker Hubertus Fischer Florian Adolphi Tobias Erhardt Michael Sigl Amaelle Landais Frédéric Parrenin Christo Buizert Joseph R. McConnell Mirko Severi Robert Mulvaney Matthias Bigler 2020-08-19 https://doi.org/10.5194/cp-16-1565-2020 eng eng Zenodo https://zenodo.org/communities/eu https://doi.org/10.5194/cp-16-1565-2020 oai:zenodo.org:4585864 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/article 2020 ftzenodo https://doi.org/10.5194/cp-16-1565-2020 2024-07-26T23:01:16Z Abstract. The last glacial period is characterized by a number of millennial climate events that have been identified in both Greenland and Antarctic ice cores and that are abrupt in Greenland climate records. The mechanisms governing this climate variability remain a puzzle that requires a precise synchronization of ice cores from the two hemispheres to be resolved. Previously, Greenland and Antarctic ice cores have been synchronized primarily via their common records of gas concentrations or isotopes from the trapped air and via cosmogenic isotopes measured on the ice. In this work, we apply ice core volcanic proxies and annual layer counting to identify large volcanic eruptions that have left a signature in both Greenland and Antarctica. Generally, no tephra is associated with those eruptions in the ice cores, so the source of the eruptions cannot be identified. Instead, we identify and match sequences of volcanic eruptions with bipolar distribution of sulfate, i.e. unique patterns of volcanic events separated by the same number of years at the two poles. Using this approach, we pinpoint 82 large bipolar volcanic eruptions throughout the second half of the last glacial period (12–60 ka). This improved ice core synchronization is applied to determine the bipolar phasing of abrupt climate change events at decadal-scale precision. In response to Greenland abrupt climatic transitions, we find a response in the Antarctic water isotope signals (18O and deuterium excess) that is both more immediate and more abrupt than that found with previous gas-based interpolar synchronizations, providing additional support for our volcanic framework. On average, the Antarctic bipolar seesaw climate response lags the midpoint of Greenland abrupt 18O transitions by 12224 years. The time difference between Antarctic signals in deuterium excess and 18O, which likewise informs the time needed to propagate the signal as described by the theory of the bipolar seesaw but is less sensitive to synchronization errors, suggests an Antarctic ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland ice core Zenodo Climate of the Past 16 4 1565 1580 |
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Abstract. The last glacial period is characterized by a number of millennial climate events that have been identified in both Greenland and Antarctic ice cores and that are abrupt in Greenland climate records. The mechanisms governing this climate variability remain a puzzle that requires a precise synchronization of ice cores from the two hemispheres to be resolved. Previously, Greenland and Antarctic ice cores have been synchronized primarily via their common records of gas concentrations or isotopes from the trapped air and via cosmogenic isotopes measured on the ice. In this work, we apply ice core volcanic proxies and annual layer counting to identify large volcanic eruptions that have left a signature in both Greenland and Antarctica. Generally, no tephra is associated with those eruptions in the ice cores, so the source of the eruptions cannot be identified. Instead, we identify and match sequences of volcanic eruptions with bipolar distribution of sulfate, i.e. unique patterns of volcanic events separated by the same number of years at the two poles. Using this approach, we pinpoint 82 large bipolar volcanic eruptions throughout the second half of the last glacial period (12–60 ka). This improved ice core synchronization is applied to determine the bipolar phasing of abrupt climate change events at decadal-scale precision. In response to Greenland abrupt climatic transitions, we find a response in the Antarctic water isotope signals (18O and deuterium excess) that is both more immediate and more abrupt than that found with previous gas-based interpolar synchronizations, providing additional support for our volcanic framework. On average, the Antarctic bipolar seesaw climate response lags the midpoint of Greenland abrupt 18O transitions by 12224 years. The time difference between Antarctic signals in deuterium excess and 18O, which likewise informs the time needed to propagate the signal as described by the theory of the bipolar seesaw but is less sensitive to synchronization errors, suggests an Antarctic ... |
format |
Article in Journal/Newspaper |
author |
Anders Svensson Dorthe Dahl-Jensen Physics of Ice Climate Earth Niels Bohr Institute University of Copenhagen Copenhagen Denmark Thomas Blunier Sune O. Rasmussen Bo M. Vinther Paul Vallelonga Emilie Capron Vasileios Gkinis Eliza Cook Helle Astrid Kjær Raimund Muscheler Sepp Kipfstuhl Frank Wilhelms Thomas F. Stocker Hubertus Fischer Florian Adolphi Tobias Erhardt Michael Sigl Amaelle Landais Frédéric Parrenin Christo Buizert Joseph R. McConnell Mirko Severi Robert Mulvaney Matthias Bigler |
spellingShingle |
Anders Svensson Dorthe Dahl-Jensen Physics of Ice Climate Earth Niels Bohr Institute University of Copenhagen Copenhagen Denmark Thomas Blunier Sune O. Rasmussen Bo M. Vinther Paul Vallelonga Emilie Capron Vasileios Gkinis Eliza Cook Helle Astrid Kjær Raimund Muscheler Sepp Kipfstuhl Frank Wilhelms Thomas F. Stocker Hubertus Fischer Florian Adolphi Tobias Erhardt Michael Sigl Amaelle Landais Frédéric Parrenin Christo Buizert Joseph R. McConnell Mirko Severi Robert Mulvaney Matthias Bigler Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
author_facet |
Anders Svensson Dorthe Dahl-Jensen Physics of Ice Climate Earth Niels Bohr Institute University of Copenhagen Copenhagen Denmark Thomas Blunier Sune O. Rasmussen Bo M. Vinther Paul Vallelonga Emilie Capron Vasileios Gkinis Eliza Cook Helle Astrid Kjær Raimund Muscheler Sepp Kipfstuhl Frank Wilhelms Thomas F. Stocker Hubertus Fischer Florian Adolphi Tobias Erhardt Michael Sigl Amaelle Landais Frédéric Parrenin Christo Buizert Joseph R. McConnell Mirko Severi Robert Mulvaney Matthias Bigler |
author_sort |
Anders Svensson |
title |
Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
title_short |
Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
title_full |
Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
title_fullStr |
Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
title_full_unstemmed |
Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
title_sort |
bipolar volcanic synchronization of abrupt climate change in greenland and antarctic ice cores during the last glacial period |
publisher |
Zenodo |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-1565-2020 |
genre |
Antarc* Antarctic Antarctica Greenland ice core |
genre_facet |
Antarc* Antarctic Antarctica Greenland ice core |
op_relation |
https://zenodo.org/communities/eu https://doi.org/10.5194/cp-16-1565-2020 oai:zenodo.org:4585864 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5194/cp-16-1565-2020 |
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Climate of the Past |
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16 |
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4 |
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1565 |
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1580 |
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1810488941017563136 |