A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21
Ice-core timescales are vital for the understanding of past climate; hence they should be updated whenever significant amounts of new data become available. Here, the Greenland ice-core chronology GICC05 was revised for the last 3835 years by synchronizing six deep ice cores and three shallow ice co...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00061127 2023-05-15T16:27:22+02:00 A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 Sinnl, Giulia Winstrup, Mai Erhardt, Tobias Cook, Eliza Jensen, Camilla Marie Svensson, Anders Vinther, Bo Møllesøe Muscheler, Raimund Rasmussen, Sune Olander 2022-05 electronic https://doi.org/10.5194/cp-18-1125-2022 https://noa.gwlb.de/receive/cop_mods_00061127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060632/cp-18-1125-2022.pdf https://cp.copernicus.org/articles/18/1125/2022/cp-18-1125-2022.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-18-1125-2022 https://noa.gwlb.de/receive/cop_mods_00061127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060632/cp-18-1125-2022.pdf https://cp.copernicus.org/articles/18/1125/2022/cp-18-1125-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/cp-18-1125-2022 2022-05-29T23:11:27Z Ice-core timescales are vital for the understanding of past climate; hence they should be updated whenever significant amounts of new data become available. Here, the Greenland ice-core chronology GICC05 was revised for the last 3835 years by synchronizing six deep ice cores and three shallow ice cores from the central Greenland ice sheet. A new method was applied by combining automated counting of annual layers on multiple parallel proxies and manual fine-tuning. A layer counting bias was found in all ice cores because of site-specific signal disturbances; therefore the manual comparison of all ice cores was deemed necessary to increase timescale accuracy. After examining sources of error and their correlation lengths, the uncertainty rate was quantified to be 1 year per century. The new timescale is younger than GICC05 by about 13 years at 3835 years ago. The most recent 800 years are largely unaffected by the revision. Between 800 and 2000 years ago, the offset between timescales increases steadily, with the steepest offset occurring between 800 and 1100 years ago. Moreover, offset oscillations of about 5 years around the average are observed between 2500 and 3800 years ago. The non-linear offset behavior is attributed to previous mismatches of volcanic eruptions, to the much more extensive dataset available to this study, and to the finer resolution of the new ice-core ammonium matching. By analysis of the common variations in cosmogenic radionuclides, the new ice-core timescale is found to be in alignment with the IntCal20 curve (Reimer et al., 2020). Article in Journal/Newspaper Greenland Greenland ice core ice core Ice Sheet Niedersächsisches Online-Archiv NOA Greenland Reimer ENVELOPE(-86.200,-86.200,-77.800,-77.800) Climate of the Past 18 5 1125 1150 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Sinnl, Giulia Winstrup, Mai Erhardt, Tobias Cook, Eliza Jensen, Camilla Marie Svensson, Anders Vinther, Bo Møllesøe Muscheler, Raimund Rasmussen, Sune Olander A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
topic_facet |
article Verlagsveröffentlichung |
description |
Ice-core timescales are vital for the understanding of past climate; hence they should be updated whenever significant amounts of new data become available. Here, the Greenland ice-core chronology GICC05 was revised for the last 3835 years by synchronizing six deep ice cores and three shallow ice cores from the central Greenland ice sheet. A new method was applied by combining automated counting of annual layers on multiple parallel proxies and manual fine-tuning. A layer counting bias was found in all ice cores because of site-specific signal disturbances; therefore the manual comparison of all ice cores was deemed necessary to increase timescale accuracy. After examining sources of error and their correlation lengths, the uncertainty rate was quantified to be 1 year per century. The new timescale is younger than GICC05 by about 13 years at 3835 years ago. The most recent 800 years are largely unaffected by the revision. Between 800 and 2000 years ago, the offset between timescales increases steadily, with the steepest offset occurring between 800 and 1100 years ago. Moreover, offset oscillations of about 5 years around the average are observed between 2500 and 3800 years ago. The non-linear offset behavior is attributed to previous mismatches of volcanic eruptions, to the much more extensive dataset available to this study, and to the finer resolution of the new ice-core ammonium matching. By analysis of the common variations in cosmogenic radionuclides, the new ice-core timescale is found to be in alignment with the IntCal20 curve (Reimer et al., 2020). |
format |
Article in Journal/Newspaper |
author |
Sinnl, Giulia Winstrup, Mai Erhardt, Tobias Cook, Eliza Jensen, Camilla Marie Svensson, Anders Vinther, Bo Møllesøe Muscheler, Raimund Rasmussen, Sune Olander |
author_facet |
Sinnl, Giulia Winstrup, Mai Erhardt, Tobias Cook, Eliza Jensen, Camilla Marie Svensson, Anders Vinther, Bo Møllesøe Muscheler, Raimund Rasmussen, Sune Olander |
author_sort |
Sinnl, Giulia |
title |
A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
title_short |
A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
title_full |
A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
title_fullStr |
A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
title_full_unstemmed |
A multi-ice-core, annual-layer-counted Greenland ice-core chronology for the last 3800 years: GICC21 |
title_sort |
multi-ice-core, annual-layer-counted greenland ice-core chronology for the last 3800 years: gicc21 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-1125-2022 https://noa.gwlb.de/receive/cop_mods_00061127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060632/cp-18-1125-2022.pdf https://cp.copernicus.org/articles/18/1125/2022/cp-18-1125-2022.pdf |
long_lat |
ENVELOPE(-86.200,-86.200,-77.800,-77.800) |
geographic |
Greenland Reimer |
geographic_facet |
Greenland Reimer |
genre |
Greenland Greenland ice core ice core Ice Sheet |
genre_facet |
Greenland Greenland ice core ice core Ice Sheet |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-18-1125-2022 https://noa.gwlb.de/receive/cop_mods_00061127 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00060632/cp-18-1125-2022.pdf https://cp.copernicus.org/articles/18/1125/2022/cp-18-1125-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-18-1125-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
5 |
container_start_page |
1125 |
op_container_end_page |
1150 |
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1766016523016601600 |