The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP)
We present the WD2014 chronology for the upper part (0-2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus GmbH
2016
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Online Access: | https://lup.lub.lu.se/record/17836fe5-9fab-45ba-9265-3fd99e9de12a https://doi.org/10.5194/cp-12-769-2016 |
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ftulundlup:oai:lup.lub.lu.se:17836fe5-9fab-45ba-9265-3fd99e9de12a 2024-05-19T07:30:36+00:00 The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) Sigl, Michael Fudge, Tyler J. Winstrup, Mai Cole-Dai, Jihong Ferris, David McConnell, Joseph R. Taylor, Ken C. Welten, Kees C. Woodruff, Thomas E. Adolphi, Florian Bisiaux, Marion Brook, Edward J. Buizert, Christo Caffee, Marc W. Dunbar, Nelia W. Edwards, Ross Geng, Lei Iverson, Nels Koffman, Bess Layman, Lawrence Maselli, Olivia J. McGwire, Kenneth Muscheler, Raimund Nishiizumi, Kunihiko Pasteris, Daniel R. Rhodes, Rachael H. Sowers, Todd A. 2016-03-30 https://lup.lub.lu.se/record/17836fe5-9fab-45ba-9265-3fd99e9de12a https://doi.org/10.5194/cp-12-769-2016 eng eng Copernicus GmbH https://lup.lub.lu.se/record/17836fe5-9fab-45ba-9265-3fd99e9de12a http://dx.doi.org/10.5194/cp-12-769-2016 scopus:84962441170 wos:000376072300011 Climate of the Past; 12(3), pp 769-786 (2016) ISSN: 1814-9324 Geology Climate Research contributiontojournal/article info:eu-repo/semantics/article text 2016 ftulundlup https://doi.org/10.5194/cp-12-769-2016 2024-04-23T23:37:09Z We present the WD2014 chronology for the upper part (0-2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes in the source, transport, and deposition of aerosols. The measurements were interpreted manually and with the aid of two automated methods. We validated the chronology by comparing to two high-accuracy, absolutely dated chronologies. For the Holocene, the cosmogenic isotope records of 10Be from WAIS Divide and 14C for IntCal13 demonstrated that WD2014 was consistently accurate to better than 0.5 % of the age. For the glacial period, comparisons to the Hulu Cave chronology demonstrated that WD2014 had an accuracy of better than 1 % of the age at three abrupt climate change events between 27 and 31 ka. WD2014 has consistently younger ages than Greenland ice core chronologies during most of the Holocene. For the Younger Dryas-Preboreal transition (11.595 ka; 24 years younger) and the Bølling-Allerød Warming (14.621 ka; 7 years younger), WD2014 ages are within the combined uncertainties of the timescales. Given its high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere, with synchronization to other chronologies feasible using high-quality proxies of volcanism, solar activity, atmospheric mineral dust, and atmospheric methane concentrations. Article in Journal/Newspaper Antarc* Antarctic Greenland Greenland ice core ice core Ice Sheet Lund University Publications (LUP) Climate of the Past 12 3 769 786 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Climate Research |
spellingShingle |
Geology Climate Research Sigl, Michael Fudge, Tyler J. Winstrup, Mai Cole-Dai, Jihong Ferris, David McConnell, Joseph R. Taylor, Ken C. Welten, Kees C. Woodruff, Thomas E. Adolphi, Florian Bisiaux, Marion Brook, Edward J. Buizert, Christo Caffee, Marc W. Dunbar, Nelia W. Edwards, Ross Geng, Lei Iverson, Nels Koffman, Bess Layman, Lawrence Maselli, Olivia J. McGwire, Kenneth Muscheler, Raimund Nishiizumi, Kunihiko Pasteris, Daniel R. Rhodes, Rachael H. Sowers, Todd A. The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
topic_facet |
Geology Climate Research |
description |
We present the WD2014 chronology for the upper part (0-2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes in the source, transport, and deposition of aerosols. The measurements were interpreted manually and with the aid of two automated methods. We validated the chronology by comparing to two high-accuracy, absolutely dated chronologies. For the Holocene, the cosmogenic isotope records of 10Be from WAIS Divide and 14C for IntCal13 demonstrated that WD2014 was consistently accurate to better than 0.5 % of the age. For the glacial period, comparisons to the Hulu Cave chronology demonstrated that WD2014 had an accuracy of better than 1 % of the age at three abrupt climate change events between 27 and 31 ka. WD2014 has consistently younger ages than Greenland ice core chronologies during most of the Holocene. For the Younger Dryas-Preboreal transition (11.595 ka; 24 years younger) and the Bølling-Allerød Warming (14.621 ka; 7 years younger), WD2014 ages are within the combined uncertainties of the timescales. Given its high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere, with synchronization to other chronologies feasible using high-quality proxies of volcanism, solar activity, atmospheric mineral dust, and atmospheric methane concentrations. |
format |
Article in Journal/Newspaper |
author |
Sigl, Michael Fudge, Tyler J. Winstrup, Mai Cole-Dai, Jihong Ferris, David McConnell, Joseph R. Taylor, Ken C. Welten, Kees C. Woodruff, Thomas E. Adolphi, Florian Bisiaux, Marion Brook, Edward J. Buizert, Christo Caffee, Marc W. Dunbar, Nelia W. Edwards, Ross Geng, Lei Iverson, Nels Koffman, Bess Layman, Lawrence Maselli, Olivia J. McGwire, Kenneth Muscheler, Raimund Nishiizumi, Kunihiko Pasteris, Daniel R. Rhodes, Rachael H. Sowers, Todd A. |
author_facet |
Sigl, Michael Fudge, Tyler J. Winstrup, Mai Cole-Dai, Jihong Ferris, David McConnell, Joseph R. Taylor, Ken C. Welten, Kees C. Woodruff, Thomas E. Adolphi, Florian Bisiaux, Marion Brook, Edward J. Buizert, Christo Caffee, Marc W. Dunbar, Nelia W. Edwards, Ross Geng, Lei Iverson, Nels Koffman, Bess Layman, Lawrence Maselli, Olivia J. McGwire, Kenneth Muscheler, Raimund Nishiizumi, Kunihiko Pasteris, Daniel R. Rhodes, Rachael H. Sowers, Todd A. |
author_sort |
Sigl, Michael |
title |
The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
title_short |
The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
title_full |
The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
title_fullStr |
The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
title_full_unstemmed |
The WAIS Divide deep ice core WD2014 chronology - Part 2 : Annual-layer counting (0-31 ka BP) |
title_sort |
wais divide deep ice core wd2014 chronology - part 2 : annual-layer counting (0-31 ka bp) |
publisher |
Copernicus GmbH |
publishDate |
2016 |
url |
https://lup.lub.lu.se/record/17836fe5-9fab-45ba-9265-3fd99e9de12a https://doi.org/10.5194/cp-12-769-2016 |
genre |
Antarc* Antarctic Greenland Greenland ice core ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Greenland Greenland ice core ice core Ice Sheet |
op_source |
Climate of the Past; 12(3), pp 769-786 (2016) ISSN: 1814-9324 |
op_relation |
https://lup.lub.lu.se/record/17836fe5-9fab-45ba-9265-3fd99e9de12a http://dx.doi.org/10.5194/cp-12-769-2016 scopus:84962441170 wos:000376072300011 |
op_doi |
https://doi.org/10.5194/cp-12-769-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
3 |
container_start_page |
769 |
op_container_end_page |
786 |
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1799487773823991808 |