Brief Communication: New evidence further constraining Tibetan ice core chronologies to the Holocene

There is considerable controversy regarding the age ranges of Tibetan ice cores. The Guliya ice core was reported to reach as far back as ~ 760 ka (thousand years), whereas chronologies of all other Tibetan cores cover at most the Holocene. Here we present ages for two new ice cores reaching bedrock...

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Bibliographic Details
Main Authors: Hou, Shugui, Zhang, Wangbin, Fang, Ling, Jenk, Theo M., Wu, Shuangye, Pang, Hongxi, Schwikowski, Margit
Format: Text
Language:English
Published: 2020
Subjects:
ice core
Online Access:https://doi.org/10.5194/tc-2020-225
https://tc.copernicus.org/preprints/tc-2020-225/
Description
Summary:There is considerable controversy regarding the age ranges of Tibetan ice cores. The Guliya ice core was reported to reach as far back as ~ 760 ka (thousand years), whereas chronologies of all other Tibetan cores cover at most the Holocene. Here we present ages for two new ice cores reaching bedrock, from the Zangser Kangri (ZK) glacier in the northwestern Tibetan Plateau and the Shulenanshan (SLNS) glacier in the western Qilian Mountains. We estimated bottom ages of 8.90 ± 0.57/0.56 ka BP and 7.46 ± 1.46/1.79 ka BP for the ZK and SLNS ice core respectively, constraining the time range accessible by Tibetan ice cores to the Holocene.

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