Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains
An accurate chronology is the essential first step for a sound understanding of ice core records. However, dating ice cores drilled from the high-elevation glaciers is challenging and often problematic, leading to great uncertainties. The Guliya ice core, drilled to the bedrock (308.6 m in length) a...
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ftdoajarticles:oai:doaj.org/article:00d6b269fe974852a099e28c76f6c97d 2023-05-15T16:38:18+02:00 Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains S. Hou T. M. Jenk W. Zhang C. Wang S. Wu Y. Wang H. Pang M. Schwikowski 2018-07-01T00:00:00Z https://doi.org/10.5194/tc-12-2341-2018 https://doaj.org/article/00d6b269fe974852a099e28c76f6c97d EN eng Copernicus Publications https://www.the-cryosphere.net/12/2341/2018/tc-12-2341-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-2341-2018 1994-0416 1994-0424 https://doaj.org/article/00d6b269fe974852a099e28c76f6c97d The Cryosphere, Vol 12, Pp 2341-2348 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/tc-12-2341-2018 2022-12-31T08:56:20Z An accurate chronology is the essential first step for a sound understanding of ice core records. However, dating ice cores drilled from the high-elevation glaciers is challenging and often problematic, leading to great uncertainties. The Guliya ice core, drilled to the bedrock (308.6 m in length) along the western Kunlun Mountains on the north-western Tibetan Plateau (TP) and widely used as a benchmark for palaeoclimate research, is believed to reach > 500 ka (thousand years) at its bottom. Meanwhile other Tibetan ice cores (i.e. Dasuopu and East Rongbuk in the Himalayas, Puruogangri in the central TP and Dunde in the north-eastern TP) are mostly of Holocene origin. In this study, we drilled four ice cores into bedrock (216.6, 208.6, 135.8 and 133.8 m in length, respectively) from the Chongce ice cap ∼ 30 km to the Guliya ice core drilling site. We took measurements of 14 C, 210 Pb, tritium and β activity for the ice cores, and used these values in a two-parameter flow model to establish the ice core depth–age relationship. We suggested that the Chongce ice cores might be of Holocene origin, consistent with the other Tibetan ice cores except Guliya. The remarkable discrepancy between the Guliya and all the other Tibetan ice core chronology implies that more effort is necessary to explore multiple dating techniques to confirm the age ranges of the TP glaciers, including those from Chongce and Guliya. Article in Journal/Newspaper Ice cap ice core The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 12 7 2341 2348 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
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Environmental sciences GE1-350 Geology QE1-996.5 S. Hou T. M. Jenk W. Zhang C. Wang S. Wu Y. Wang H. Pang M. Schwikowski Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
An accurate chronology is the essential first step for a sound understanding of ice core records. However, dating ice cores drilled from the high-elevation glaciers is challenging and often problematic, leading to great uncertainties. The Guliya ice core, drilled to the bedrock (308.6 m in length) along the western Kunlun Mountains on the north-western Tibetan Plateau (TP) and widely used as a benchmark for palaeoclimate research, is believed to reach > 500 ka (thousand years) at its bottom. Meanwhile other Tibetan ice cores (i.e. Dasuopu and East Rongbuk in the Himalayas, Puruogangri in the central TP and Dunde in the north-eastern TP) are mostly of Holocene origin. In this study, we drilled four ice cores into bedrock (216.6, 208.6, 135.8 and 133.8 m in length, respectively) from the Chongce ice cap ∼ 30 km to the Guliya ice core drilling site. We took measurements of 14 C, 210 Pb, tritium and β activity for the ice cores, and used these values in a two-parameter flow model to establish the ice core depth–age relationship. We suggested that the Chongce ice cores might be of Holocene origin, consistent with the other Tibetan ice cores except Guliya. The remarkable discrepancy between the Guliya and all the other Tibetan ice core chronology implies that more effort is necessary to explore multiple dating techniques to confirm the age ranges of the TP glaciers, including those from Chongce and Guliya. |
format |
Article in Journal/Newspaper |
author |
S. Hou T. M. Jenk W. Zhang C. Wang S. Wu Y. Wang H. Pang M. Schwikowski |
author_facet |
S. Hou T. M. Jenk W. Zhang C. Wang S. Wu Y. Wang H. Pang M. Schwikowski |
author_sort |
S. Hou |
title |
Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
title_short |
Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
title_full |
Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
title_fullStr |
Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
title_full_unstemmed |
Age ranges of the Tibetan ice cores with emphasis on the Chongce ice cores, western Kunlun Mountains |
title_sort |
age ranges of the tibetan ice cores with emphasis on the chongce ice cores, western kunlun mountains |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-2341-2018 https://doaj.org/article/00d6b269fe974852a099e28c76f6c97d |
genre |
Ice cap ice core The Cryosphere |
genre_facet |
Ice cap ice core The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 2341-2348 (2018) |
op_relation |
https://www.the-cryosphere.net/12/2341/2018/tc-12-2341-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-2341-2018 1994-0416 1994-0424 https://doaj.org/article/00d6b269fe974852a099e28c76f6c97d |
op_doi |
https://doi.org/10.5194/tc-12-2341-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
7 |
container_start_page |
2341 |
op_container_end_page |
2348 |
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1766028583513358336 |