Validation of ice-wedge isotopes at Yituli'he, northeastern China as climate proxy (SCI)
文献类型：期刊论文
| 作者 | Yang S. Z.; Cao X. Y.; Jin H. J. |
| 刊名 | Boreas
 |
| 出版日期 | 2015 |
| 卷号 | 44期号:3页码:502-510 |
| 英文摘要 | Inactive ice wedges are still present today at Yituli'he in the middle Da Xing'anling (Greater Hinggan) Mountains in northeastern China, which is the southernmost known site (50 degrees 37N) with ice wedges in the Northern Hemisphere. However, it is uncertain whether the ice-wedge isotope composition, characterized by low O-18, D and low deuterium excess values, is representative of the isotope signature of a broader region. In this paper, the ice-wedge isotope compositions were examined in the context of the stable isotopes of precipitation from the nearby Global Network of Isotopes in Precipitation (GNIP) stations. In addition, the pollen spectra from the host sediments were analysed to provide additional information on local vegetation in order to better understand the climate conditions favouring ice-wedge formation. The pollen spectra suggest that the Yituli'he ice wedges developed during the colder and wetter period after 6000cal. a BP. The isotopes in the Yituli'he ice wedges are consistent with the isotope background recorded in atmospheric precipitation collected at the nearby GNIP stations. When the snow-melt froze into ice veinlets, the isotope signals did not change substantially because of the strong, cold, continental anticyclones in winter as well as a strong temperature inversion that prevail in the Da Xing'anling Mountains. As the climate pattern did not change substantially, the neoglacial cold period is unlikely to have allowed for strong secondary fractionation of isotope records during ice-wedge formation. Thus, the annual isotope signature can be interpreted as a valid archive of climate data. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.casnw.net/handle/362004/27560]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yang S. Z.,Cao X. Y.,Jin H. J.. Validation of ice-wedge isotopes at Yituli'he, northeastern China as climate proxy (SCI)[J]. Boreas,2015,44(3):502-510. |
| APA | Yang S. Z.,Cao X. Y.,&Jin H. J..(2015).Validation of ice-wedge isotopes at Yituli'he, northeastern China as climate proxy (SCI).Boreas,44(3),502-510. |
| MLA | Yang S. Z.,et al."Validation of ice-wedge isotopes at Yituli'he, northeastern China as climate proxy (SCI)".Boreas 44.3(2015):502-510. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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