Apparent discrepancy of Tibetan ice core δ 18 O records may be attributed to misinterpretation of chronology

Ice cores from the Tibetan Plateau (TP) are widely used for reconstructing past climatic and environmental conditions that extend beyond the instrumental period. However, challenges in dating and interpreting ice core records often lead to inconsistent results. The Guliya ice core drilled from the n...

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Bibliographic Details
Published in:The Cryosphere
Main Authors: S. Hou, W. Zhang, H. Pang, S.-Y. Wu, T. M. Jenk, M. Schwikowski, Y. Wang
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2019
Subjects:
Environmental sciences
GE1-350
Geology
QE1-996.5
Ice cap
ice core
The Cryosphere
Online Access:https://doi.org/10.5194/tc-13-1743-2019
https://doaj.org/article/bd9218c986594554bdf4165708ed0b7f
Description
Summary:Ice cores from the Tibetan Plateau (TP) are widely used for reconstructing past climatic and environmental conditions that extend beyond the instrumental period. However, challenges in dating and interpreting ice core records often lead to inconsistent results. The Guliya ice core drilled from the northwestern TP suggested a cooling trend during the mid-Holocene based on its decreasing δ 18 O values, which is not observed in other Tibetan ice cores. Here we present a new high-resolution δ 18 O record of the Chongce ice cores drilled to bedrock ∼30 km away from the Guliya ice cap. Our record shows a warming trend during the mid-Holocene. Based on our results as well as previously published ice core data, we suggest that the apparent discrepancy between the Holocene δ 18 O records of the Guliya and the Chongce ice cores may be attributed to a possible misinterpretation of the Guliya ice core chronology.

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