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...
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ftdoajarticles:oai:doaj.org/article:65225ac835e84e3ba54415dbed23d98a 2023-05-15T13:38:27+02:00 The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP) M. Sigl T. J. Fudge M. Winstrup J. Cole-Dai D. Ferris J. R. McConnell K. C. Taylor K. C. Welten T. E. Woodruff F. Adolphi M. Bisiaux E. J. Brook C. Buizert M. W. Caffee N. W. Dunbar R. Edwards L. Geng N. Iverson B. Koffman L. Layman O. J. Maselli K. McGwire R. Muscheler K. Nishiizumi D. R. Pasteris R. H. Rhodes T. A. Sowers 2016-03-01T00:00:00Z https://doi.org/10.5194/cp-12-769-2016 https://doaj.org/article/65225ac835e84e3ba54415dbed23d98a EN eng Copernicus Publications http://www.clim-past.net/12/769/2016/cp-12-769-2016.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-12-769-2016 https://doaj.org/article/65225ac835e84e3ba54415dbed23d98a Climate of the Past, Vol 12, Iss 3, Pp 769-786 (2016) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2016 ftdoajarticles https://doi.org/10.5194/cp-12-769-2016 2022-12-31T13:01:53Z 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 10 Be from WAIS Divide and 14 C 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 Directory of Open Access Journals: DOAJ Articles Antarctic West Antarctic Ice Sheet Greenland Hulu ENVELOPE(8.610,8.610,62.837,62.837) Climate of the Past 12 3 769 786 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 M. Sigl T. J. Fudge M. Winstrup J. Cole-Dai D. Ferris J. R. McConnell K. C. Taylor K. C. Welten T. E. Woodruff F. Adolphi M. Bisiaux E. J. Brook C. Buizert M. W. Caffee N. W. Dunbar R. Edwards L. Geng N. Iverson B. Koffman L. Layman O. J. Maselli K. McGwire R. Muscheler K. Nishiizumi D. R. Pasteris R. H. Rhodes T. A. Sowers The WAIS Divide deep ice core WD2014 chronology – Part 2: Annual-layer counting (0–31 ka BP) |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 10 Be from WAIS Divide and 14 C 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 |
M. Sigl T. J. Fudge M. Winstrup J. Cole-Dai D. Ferris J. R. McConnell K. C. Taylor K. C. Welten T. E. Woodruff F. Adolphi M. Bisiaux E. J. Brook C. Buizert M. W. Caffee N. W. Dunbar R. Edwards L. Geng N. Iverson B. Koffman L. Layman O. J. Maselli K. McGwire R. Muscheler K. Nishiizumi D. R. Pasteris R. H. Rhodes T. A. Sowers |
author_facet |
M. Sigl T. J. Fudge M. Winstrup J. Cole-Dai D. Ferris J. R. McConnell K. C. Taylor K. C. Welten T. E. Woodruff F. Adolphi M. Bisiaux E. J. Brook C. Buizert M. W. Caffee N. W. Dunbar R. Edwards L. Geng N. Iverson B. Koffman L. Layman O. J. Maselli K. McGwire R. Muscheler K. Nishiizumi D. R. Pasteris R. H. Rhodes T. A. Sowers |
author_sort |
M. Sigl |
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 Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/cp-12-769-2016 https://doaj.org/article/65225ac835e84e3ba54415dbed23d98a |
long_lat |
ENVELOPE(8.610,8.610,62.837,62.837) |
geographic |
Antarctic West Antarctic Ice Sheet Greenland Hulu |
geographic_facet |
Antarctic West Antarctic Ice Sheet Greenland Hulu |
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, Vol 12, Iss 3, Pp 769-786 (2016) |
op_relation |
http://www.clim-past.net/12/769/2016/cp-12-769-2016.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-12-769-2016 https://doaj.org/article/65225ac835e84e3ba54415dbed23d98a |
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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1766106511797387264 |