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description Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2020 France, Italy, United Kingdom, France, France, Denmark, SwitzerlandPublisher:Copernicus GmbH Funded by:EC | THERA, SNSF | EURODIVERSITY 2005 FP083-..., EC | TiPES +2 projectsEC| THERA ,SNSF| EURODIVERSITY 2005 FP083-MICROSYSTEMS: Microbial Diversity and Functionality in Cold Water Coral Reef Ecosystems ,EC| TiPES ,NSF| Collaborative Research: Investigating Upper Pleistocene Rapid Climate Change using Continuous, Ultra-High-Resolution Aerosol and Gas Measurements in the WAIS Divide Ice Core ,NSF| Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide CoreAnders Svensson; Dorthe Dahl-Jensen; Jørgen Peder Steffensen; Thomas Blunier; Sune Olander Rasmussen; Bo Møllesøe 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;handle: 2158/1217040
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 (δ18O 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 δ18O transitions by 122±24 years. The time difference between Antarctic signals in deuterium excess and δ18O, 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 δ18O lag behind Greenland of 152±37 years. These estimates are shorter than the 200 years suggested by earlier gas-based synchronizations. As before, we find variations in the timing and duration between the response at different sites and for different events suggesting an interaction of oceanic and atmospheric teleconnection patterns as well as internal climate variability. International audience
ZENODO; Climate of t... arrow_drop_down ZENODO; Climate of the Past (CP); Flore (Florence Research Repository); NERC Open Research ArchiveOther literature type . Article . 2020 . Peer-reviewedLicense: CC BYBern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)Copernicus Publications; Climate of the Past (CP)Other literature type . 2020Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2020Data sources: Copenhagen University Research Information SystemClimate of the Past (CP); OpenAIREOther literature type . 2020Bern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 45 citations 45 popularity Top 1% influence Average impulse Top 1% Powered by BIP!visibility 29visibility views 29 download downloads 32 Powered bymore_vert ZENODO; Climate of t... arrow_drop_down ZENODO; Climate of the Past (CP); Flore (Florence Research Repository); NERC Open Research ArchiveOther literature type . Article . 2020 . Peer-reviewedLicense: CC BYBern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)Copernicus Publications; Climate of the Past (CP)Other literature type . 2020Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2020Data sources: Copenhagen University Research Information SystemClimate of the Past (CP); OpenAIREOther literature type . 2020Bern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article , Other literature type , Preprint 2020 France, Italy, United Kingdom, France, France, Denmark, SwitzerlandPublisher:Copernicus GmbH Funded by:EC | THERA, SNSF | EURODIVERSITY 2005 FP083-..., EC | TiPES +2 projectsEC| THERA ,SNSF| EURODIVERSITY 2005 FP083-MICROSYSTEMS: Microbial Diversity and Functionality in Cold Water Coral Reef Ecosystems ,EC| TiPES ,NSF| Collaborative Research: Investigating Upper Pleistocene Rapid Climate Change using Continuous, Ultra-High-Resolution Aerosol and Gas Measurements in the WAIS Divide Ice Core ,NSF| Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide CoreAnders Svensson; Dorthe Dahl-Jensen; Jørgen Peder Steffensen; Thomas Blunier; Sune Olander Rasmussen; Bo Møllesøe 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;handle: 2158/1217040
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 (δ18O 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 δ18O transitions by 122±24 years. The time difference between Antarctic signals in deuterium excess and δ18O, 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 δ18O lag behind Greenland of 152±37 years. These estimates are shorter than the 200 years suggested by earlier gas-based synchronizations. As before, we find variations in the timing and duration between the response at different sites and for different events suggesting an interaction of oceanic and atmospheric teleconnection patterns as well as internal climate variability. International audience
ZENODO; Climate of t... arrow_drop_down ZENODO; Climate of the Past (CP); Flore (Florence Research Repository); NERC Open Research ArchiveOther literature type . Article . 2020 . Peer-reviewedLicense: CC BYBern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)Copernicus Publications; Climate of the Past (CP)Other literature type . 2020Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2020Data sources: Copenhagen University Research Information SystemClimate of the Past (CP); OpenAIREOther literature type . 2020Bern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2020-41&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 45 citations 45 popularity Top 1% influence Average impulse Top 1% Powered by BIP!visibility 29visibility views 29 download downloads 32 Powered bymore_vert ZENODO; Climate of t... arrow_drop_down ZENODO; Climate of the Past (CP); Flore (Florence Research Repository); NERC Open Research ArchiveOther literature type . Article . 2020 . Peer-reviewedLicense: CC BYBern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)Copernicus Publications; Climate of the Past (CP)Other literature type . 2020Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2020Data sources: Copenhagen University Research Information SystemClimate of the Past (CP); OpenAIREOther literature type . 2020Bern Open Repository and Information System (BORIS)Article . 2020 . Peer-reviewedData sources: Bern Open Repository and Information System (BORIS)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/cp-2020-41&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu