The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting
The South Pole Ice Core (SPICEcore) was drilled in 2014–2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth–age relationship. Here, we present the SPICEcore (...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00040580 2023-05-15T14:02:33+02:00 The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting Winski, Dominic A. Fudge, Tyler J. Ferris, David G. Osterberg, Erich C. Fegyveresi, John M. Cole-Dai, Jihong Thundercloud, Zayta Cox, Thomas S. Kreutz, Karl J. Ortman, Nikolas Buizert, Christo Epifanio, Jenna Brook, Edward J. Beaudette, Ross Severinghaus, Jeffrey Sowers, Todd Steig, Eric J. Kahle, Emma C. Jones, Tyler R. Morris, Valerie Aydin, Murat Nicewonger, Melinda R. Casey, Kimberly A. Alley, Richard B. Waddington, Edwin D. Iverson, Nels A. Dunbar, Nelia W. Bay, Ryan C. Souney, Joseph M. Sigl, Michael McConnell, Joseph R. 2019-10 electronic https://doi.org/10.5194/cp-15-1793-2019 https://noa.gwlb.de/receive/cop_mods_00040580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040203/cp-15-1793-2019.pdf https://cp.copernicus.org/articles/15/1793/2019/cp-15-1793-2019.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-15-1793-2019 https://noa.gwlb.de/receive/cop_mods_00040580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040203/cp-15-1793-2019.pdf https://cp.copernicus.org/articles/15/1793/2019/cp-15-1793-2019.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2019 ftnonlinearchiv https://doi.org/10.5194/cp-15-1793-2019 2022-02-08T22:42:04Z The South Pole Ice Core (SPICEcore) was drilled in 2014–2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth–age relationship. Here, we present the SPICEcore (SP19) timescale for the age of the ice of SPICEcore. SP19 is synchronized to the WD2014 chronology from the West Antarctic Ice Sheet Divide (WAIS Divide) ice core using stratigraphic matching of 251 volcanic events. These events indicate an age of 54 302±519 BP (years before 1950) at the bottom of SPICEcore. Annual layers identified in sodium and magnesium ions to 11 341 BP were used to interpolate between stratigraphic volcanic tie points, yielding an annually resolved chronology through the Holocene. Estimated timescale uncertainty during the Holocene is less than 18 years relative to WD2014, with the exception of the interval between 1800 to 3100 BP when uncertainty estimates reach ±25 years due to widely spaced volcanic tie points. Prior to the Holocene, uncertainties remain within 124 years relative to WD2014. Results show an average Holocene accumulation rate of 7.4 cm yr−1 (water equivalent). The time variability of accumulation rate is consistent with expectations for steady-state ice flow through the modern spatial pattern of accumulation rate. Time variations in nitrate concentration, nitrate seasonal amplitude and δ15N of N2 in turn are as expected for the accumulation rate variations. The highly variable yet well-constrained Holocene accumulation history at the site can help improve scientific understanding of deposition-sensitive climate proxies such as δ15N of N2 and photolyzed chemical compounds. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet South pole South pole Niedersächsisches Online-Archiv NOA Antarctic East Antarctica West Antarctic Ice Sheet South Pole Climate of the Past 15 5 1793 1808 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Winski, Dominic A. Fudge, Tyler J. Ferris, David G. Osterberg, Erich C. Fegyveresi, John M. Cole-Dai, Jihong Thundercloud, Zayta Cox, Thomas S. Kreutz, Karl J. Ortman, Nikolas Buizert, Christo Epifanio, Jenna Brook, Edward J. Beaudette, Ross Severinghaus, Jeffrey Sowers, Todd Steig, Eric J. Kahle, Emma C. Jones, Tyler R. Morris, Valerie Aydin, Murat Nicewonger, Melinda R. Casey, Kimberly A. Alley, Richard B. Waddington, Edwin D. Iverson, Nels A. Dunbar, Nelia W. Bay, Ryan C. Souney, Joseph M. Sigl, Michael McConnell, Joseph R. The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
topic_facet |
article Verlagsveröffentlichung |
description |
The South Pole Ice Core (SPICEcore) was drilled in 2014–2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth–age relationship. Here, we present the SPICEcore (SP19) timescale for the age of the ice of SPICEcore. SP19 is synchronized to the WD2014 chronology from the West Antarctic Ice Sheet Divide (WAIS Divide) ice core using stratigraphic matching of 251 volcanic events. These events indicate an age of 54 302±519 BP (years before 1950) at the bottom of SPICEcore. Annual layers identified in sodium and magnesium ions to 11 341 BP were used to interpolate between stratigraphic volcanic tie points, yielding an annually resolved chronology through the Holocene. Estimated timescale uncertainty during the Holocene is less than 18 years relative to WD2014, with the exception of the interval between 1800 to 3100 BP when uncertainty estimates reach ±25 years due to widely spaced volcanic tie points. Prior to the Holocene, uncertainties remain within 124 years relative to WD2014. Results show an average Holocene accumulation rate of 7.4 cm yr−1 (water equivalent). The time variability of accumulation rate is consistent with expectations for steady-state ice flow through the modern spatial pattern of accumulation rate. Time variations in nitrate concentration, nitrate seasonal amplitude and δ15N of N2 in turn are as expected for the accumulation rate variations. The highly variable yet well-constrained Holocene accumulation history at the site can help improve scientific understanding of deposition-sensitive climate proxies such as δ15N of N2 and photolyzed chemical compounds. |
format |
Article in Journal/Newspaper |
author |
Winski, Dominic A. Fudge, Tyler J. Ferris, David G. Osterberg, Erich C. Fegyveresi, John M. Cole-Dai, Jihong Thundercloud, Zayta Cox, Thomas S. Kreutz, Karl J. Ortman, Nikolas Buizert, Christo Epifanio, Jenna Brook, Edward J. Beaudette, Ross Severinghaus, Jeffrey Sowers, Todd Steig, Eric J. Kahle, Emma C. Jones, Tyler R. Morris, Valerie Aydin, Murat Nicewonger, Melinda R. Casey, Kimberly A. Alley, Richard B. Waddington, Edwin D. Iverson, Nels A. Dunbar, Nelia W. Bay, Ryan C. Souney, Joseph M. Sigl, Michael McConnell, Joseph R. |
author_facet |
Winski, Dominic A. Fudge, Tyler J. Ferris, David G. Osterberg, Erich C. Fegyveresi, John M. Cole-Dai, Jihong Thundercloud, Zayta Cox, Thomas S. Kreutz, Karl J. Ortman, Nikolas Buizert, Christo Epifanio, Jenna Brook, Edward J. Beaudette, Ross Severinghaus, Jeffrey Sowers, Todd Steig, Eric J. Kahle, Emma C. Jones, Tyler R. Morris, Valerie Aydin, Murat Nicewonger, Melinda R. Casey, Kimberly A. Alley, Richard B. Waddington, Edwin D. Iverson, Nels A. Dunbar, Nelia W. Bay, Ryan C. Souney, Joseph M. Sigl, Michael McConnell, Joseph R. |
author_sort |
Winski, Dominic A. |
title |
The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
title_short |
The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
title_full |
The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
title_fullStr |
The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
title_full_unstemmed |
The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting |
title_sort |
sp19 chronology for the south pole ice core – part 1: volcanic matching and annual layer counting |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-15-1793-2019 https://noa.gwlb.de/receive/cop_mods_00040580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040203/cp-15-1793-2019.pdf https://cp.copernicus.org/articles/15/1793/2019/cp-15-1793-2019.pdf |
geographic |
Antarctic East Antarctica West Antarctic Ice Sheet South Pole |
geographic_facet |
Antarctic East Antarctica West Antarctic Ice Sheet South Pole |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet South pole South pole |
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-15-1793-2019 https://noa.gwlb.de/receive/cop_mods_00040580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040203/cp-15-1793-2019.pdf https://cp.copernicus.org/articles/15/1793/2019/cp-15-1793-2019.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-15-1793-2019 |
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