Apparent discrepancy of Tibetan ice core <i>δ</i><sup>18</sup>O records may be attributed to misinterpretation of chronology
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Published:2019-06-28
Issue:6
Volume:13
Page:1743-1752
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Hou ShuguiORCID, Zhang Wangbin, Pang Hongxi, Wu Shuang-Ye, Jenk Theo M.ORCID, Schwikowski MargitORCID, Wang YetangORCID
Abstract
Abstract. 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 δ18O values, which is not observed in other Tibetan ice cores. Here we present a new high-resolution δ18O 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
δ18O records of the Guliya and the Chongce ice cores may be
attributed to a possible misinterpretation of the Guliya ice core
chronology.
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
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