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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ftcdlib:oai:escholarship.org:ark:/13030/qt6h19x3xk 2023-11-05T03:36:56+01:00 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 1793 - 1808 2019-01-01 application/pdf https://escholarship.org/uc/item/6h19x3xk unknown eScholarship, University of California qt6h19x3xk https://escholarship.org/uc/item/6h19x3xk public Climate of the Past, vol 15, iss 5 Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action Paleontology Climate change science article 2019 ftcdlib 2023-10-09T18:06:26Z 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 University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action Paleontology Climate change science |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action Paleontology Climate change science 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 |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action Paleontology Climate change science |
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 |
eScholarship, University of California |
publishDate |
2019 |
url |
https://escholarship.org/uc/item/6h19x3xk |
op_coverage |
1793 - 1808 |
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_source |
Climate of the Past, vol 15, iss 5 |
op_relation |
qt6h19x3xk https://escholarship.org/uc/item/6h19x3xk |
op_rights |
public |
_version_ |
1781692223034753024 |