Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period
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 synchroniz...
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2020
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ftdoajarticles:oai:doaj.org/article:0eae962f8b7f49869dc20595ef4bc31e 2023-05-15T13:41:49+02:00 Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period A. Svensson D. Dahl-Jensen J. P. Steffensen T. Blunier S. O. Rasmussen B. M. Vinther P. Vallelonga E. Capron V. Gkinis E. Cook H. A. Kjær R. Muscheler S. Kipfstuhl F. Wilhelms T. F. Stocker H. Fischer F. Adolphi T. Erhardt M. Sigl A. Landais F. Parrenin C. Buizert J. R. McConnell M. Severi R. Mulvaney M. Bigler 2020-08-01T00:00:00Z https://doi.org/10.5194/cp-16-1565-2020 https://doaj.org/article/0eae962f8b7f49869dc20595ef4bc31e EN eng Copernicus Publications https://cp.copernicus.org/articles/16/1565/2020/cp-16-1565-2020.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-16-1565-2020 1814-9324 1814-9332 https://doaj.org/article/0eae962f8b7f49869dc20595ef4bc31e Climate of the Past, Vol 16, Pp 1565-1580 (2020) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2020 ftdoajarticles https://doi.org/10.5194/cp-16-1565-2020 2022-12-31T06:35:19Z 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 ( δ 18 O 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 δ 18 O transitions by 122±24 years. The time difference between Antarctic signals in deuterium excess and δ 18 O , 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland ice core Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Greenland Climate of the Past 16 4 1565 1580 |
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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 A. Svensson D. Dahl-Jensen J. P. Steffensen T. Blunier S. O. Rasmussen B. M. Vinther P. Vallelonga E. Capron V. Gkinis E. Cook H. A. Kjær R. Muscheler S. Kipfstuhl F. Wilhelms T. F. Stocker H. Fischer F. Adolphi T. Erhardt M. Sigl A. Landais F. Parrenin C. Buizert J. R. McConnell M. Severi R. Mulvaney M. Bigler Bipolar volcanic synchronization of abrupt climate change in Greenland and Antarctic ice cores during the last glacial period |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
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 ( δ 18 O 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 δ 18 O transitions by 122±24 years. The time difference between Antarctic signals in deuterium excess and δ 18 O , 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 ... |
format |
Article in Journal/Newspaper |
author |
A. Svensson D. Dahl-Jensen J. P. Steffensen T. Blunier S. O. Rasmussen B. M. Vinther P. Vallelonga E. Capron V. Gkinis E. Cook H. A. Kjær R. Muscheler S. Kipfstuhl F. Wilhelms T. F. Stocker H. Fischer F. Adolphi T. Erhardt M. Sigl A. Landais F. Parrenin C. Buizert J. R. McConnell M. Severi R. Mulvaney M. Bigler |
author_facet |
A. Svensson D. Dahl-Jensen J. P. Steffensen T. Blunier S. O. Rasmussen B. M. Vinther P. Vallelonga E. Capron V. Gkinis E. Cook H. A. Kjær R. Muscheler S. Kipfstuhl F. Wilhelms T. F. Stocker H. Fischer F. Adolphi T. Erhardt M. Sigl A. Landais F. Parrenin C. Buizert J. R. McConnell M. Severi R. Mulvaney M. Bigler |
author_sort |
A. 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 |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-1565-2020 https://doaj.org/article/0eae962f8b7f49869dc20595ef4bc31e |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Greenland ice core |
genre_facet |
Antarc* Antarctic Antarctica Greenland ice core |
op_source |
Climate of the Past, Vol 16, Pp 1565-1580 (2020) |
op_relation |
https://cp.copernicus.org/articles/16/1565/2020/cp-16-1565-2020.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-16-1565-2020 1814-9324 1814-9332 https://doaj.org/article/0eae962f8b7f49869dc20595ef4bc31e |
op_doi |
https://doi.org/10.5194/cp-16-1565-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
4 |
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1565 |
op_container_end_page |
1580 |
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1766158338168455168 |