Vostok (Antarctica) ice-core time-scale from datings of different origins
Three different approaches to ice-core age dating are employed to develop a depth-age relationship at Vostok, Antarctica: (1) correlating the ice-core isotope record to the geophysical metronome (Milankovich surface temperature cycles) inferred from the borehole temperature profile, (2) importing a...
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ftneicon:oai:rour.neicon.ru:rour/130774 2023-05-15T13:29:11+02:00 Vostok (Antarctica) ice-core time-scale from datings of different origins Salamatin A. Tsyganova E. Lipenkov V. Petit J. 2004 https://openrepository.ru/article?id=130774 unknown Annals of Glaciology 283 39 0260-3055 https://openrepository.ru/article?id=130774 SCOPUS02603055-2004-39-SID23844461818 Article 2004 ftneicon 2020-07-21T11:47:33Z Three different approaches to ice-core age dating are employed to develop a depth-age relationship at Vostok, Antarctica: (1) correlating the ice-core isotope record to the geophysical metronome (Milankovich surface temperature cycles) inferred from the borehole temperature profile, (2) importing a known chronology from another (Devils Hole, Nevada, USA) paleoclimatic signal, and (3) direct ice-sheet flow modeling. Inverse Monte Carlo sampling is used to constrain the accumulation-rate reconstruction and ice-flow simulations in order to find the best-fit glaciological time-scale matched with the two other chronologies. The general uncertainty of the different age estimates varies from 2 to 6 kyr on average and reaches 6-15 kyr at maximum. Whatever the causes of this discrepancy might be, they are thought to be of different origins, and the age errors are assumed statistically independent. Thus, the average time-scale for the Vostok ice core down to 3350 m depth is deduced consistent with all three dating procedures within the standard deviation limits of ± 3.6kyr, and its accuracy is estimated as 2.2 kyr on average. The constrained ice-sheet flow model allows, at least theoretically, extrapolation of the ice age-depth curve further to the boundary with the accreted lake ice where (at 3530 m depth) the glacier-ice age may reach ∼2000 kyr. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica ice core Ice Sheet NORA (National aggregator of open repositories of Russian universities) Devils Hole ENVELOPE(0.667,0.667,56.633,56.633) |
institution |
Open Polar |
collection |
NORA (National aggregator of open repositories of Russian universities) |
op_collection_id |
ftneicon |
language |
unknown |
description |
Three different approaches to ice-core age dating are employed to develop a depth-age relationship at Vostok, Antarctica: (1) correlating the ice-core isotope record to the geophysical metronome (Milankovich surface temperature cycles) inferred from the borehole temperature profile, (2) importing a known chronology from another (Devils Hole, Nevada, USA) paleoclimatic signal, and (3) direct ice-sheet flow modeling. Inverse Monte Carlo sampling is used to constrain the accumulation-rate reconstruction and ice-flow simulations in order to find the best-fit glaciological time-scale matched with the two other chronologies. The general uncertainty of the different age estimates varies from 2 to 6 kyr on average and reaches 6-15 kyr at maximum. Whatever the causes of this discrepancy might be, they are thought to be of different origins, and the age errors are assumed statistically independent. Thus, the average time-scale for the Vostok ice core down to 3350 m depth is deduced consistent with all three dating procedures within the standard deviation limits of ± 3.6kyr, and its accuracy is estimated as 2.2 kyr on average. The constrained ice-sheet flow model allows, at least theoretically, extrapolation of the ice age-depth curve further to the boundary with the accreted lake ice where (at 3530 m depth) the glacier-ice age may reach ∼2000 kyr. |
format |
Article in Journal/Newspaper |
author |
Salamatin A. Tsyganova E. Lipenkov V. Petit J. |
spellingShingle |
Salamatin A. Tsyganova E. Lipenkov V. Petit J. Vostok (Antarctica) ice-core time-scale from datings of different origins |
author_facet |
Salamatin A. Tsyganova E. Lipenkov V. Petit J. |
author_sort |
Salamatin A. |
title |
Vostok (Antarctica) ice-core time-scale from datings of different origins |
title_short |
Vostok (Antarctica) ice-core time-scale from datings of different origins |
title_full |
Vostok (Antarctica) ice-core time-scale from datings of different origins |
title_fullStr |
Vostok (Antarctica) ice-core time-scale from datings of different origins |
title_full_unstemmed |
Vostok (Antarctica) ice-core time-scale from datings of different origins |
title_sort |
vostok (antarctica) ice-core time-scale from datings of different origins |
publishDate |
2004 |
url |
https://openrepository.ru/article?id=130774 |
long_lat |
ENVELOPE(0.667,0.667,56.633,56.633) |
geographic |
Devils Hole |
geographic_facet |
Devils Hole |
genre |
Annals of Glaciology Antarc* Antarctica ice core Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctica ice core Ice Sheet |
op_source |
SCOPUS02603055-2004-39-SID23844461818 |
op_relation |
Annals of Glaciology 283 39 0260-3055 https://openrepository.ru/article?id=130774 |
_version_ |
1765999142386008064 |