Temperature and methane records over the last 2 ka in Dasuopu ice core |
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| Authors: | Tandong Yao L G Thompson Keqin Duan Baiqing Xu Ninglian Wang Jianchen Pu Lide Tian Weizhen Sun Shichang Kang and Xiang Qin |
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| Institution: | 1. Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China
2. Byrd Polar Research Center, Ohio State University, Columbus, OH43210, USA |
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| Abstract: | High resolution δ18O and methane records over the last 2ka have been reconstructed from Dasuopu ice core recovered from the Himalayas. Analysis
shows that the δ18O record correlates well with the Northern Hemispheric temperature, Dunde ice core record, and with temperature record in
eastern China. The warming trend detected in δ18O record from the last century is similar to that during the Medieval warm period. There is a dramatic increasing in methane
concentration in the Dasuopu ice core, which reached 1031 nmol ⋅ mol-1 in 1997. Moreover, methane concentration in the Dasuopu ice core is about 15%-20% higher than that in Antarctica and Greenland.
There is a positive correlation between methane concentration and δ18O in Dasuopu ice core. |
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| Keywords: | Dasuopu ice core δ 18O methane concentration |
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