globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1816468116
论文题名:
Dating glacier ice of the last millennium by quantum technology
作者: Feng Z.; Bohleber P.; Ebser S.; Ringena L.; Schmidt M.; Kersting A.; Hopkins P.; Hoffmann H.; Fischer A.; Aeschbach W.; Oberthaler M.K.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:18
起始页码: 8781
结束页码: 8786
语种: 英语
英文关键词: Argon-39 ; Atom trap trace analysis ; Glacier ice dating
Scopus关键词: argon ; age determination ; argon trap trace analysis ; Article ; Austria ; glaciation ; glacier ; priority journal ; quantum chemistry ; radiometric dating ; stratigraphy ; validation study
英文摘要: Radiometric dating with 39Ar covers a unique time span and offers key advances in interpreting environmental archives of the last millennium. Although this tracer has been acknowledged for decades, studies so far have been limited by the low abundance and radioactivity, thus requiring huge sample sizes. Atom trap trace analysis, an application of techniques from quantum physics such as laser cooling and trapping, allows us to reduce the sample volume by several orders of magnitude compared with conventional techniques. Here we show that the adaptation of this method to 39Ar is now available for glaciological applications, by demonstrating the entire process chain for dating of alpine glacier ice by argon trap trace analysis (ArTTA). Ice blocks as small as a few kilograms are sufficient and have been obtained at two artificial glacier caves. Importantly, both sites offer direct access to the stratigraphy at the glacier base and validation against existing age constraints. The ice blocks obtained at Chli Titlis glacier at 3,030 m asl (Swiss Alps) have been dated by state-of-the-art microradiocarbon analysis in a previous study. The unique finding of a bark fragment and a larch needle within the ice of Schaufelferner glacier at 2,870 m asl (Stubai Alps, Austria) allows for conventional radiocarbon dating. At both sites the existing age information based on radiocarbon dating and visual stratigraphy corroborates the 39Ar ages. With our results, we establish argon trap trace analysis as the key to decipher so far untapped glacier archives of the last millennium. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162086
Appears in Collections:气候变化与战略

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作者单位: Feng, Z., Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany; Bohleber, P., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany, Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences, Innsbruck, 6020, Austria; Ebser, S., Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany; Ringena, L., Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany; Schmidt, M., Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany, Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany; Kersting, A., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany; Hopkins, P., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany; Hoffmann, H., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany, Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, 27570, Germany; Fischer, A., Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences, Innsbruck, 6020, Austria; Aeschbach, W., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany, Heidelberg Center for the Environment, Heidelberg University, Heidelberg, 69120, Germany; Oberthaler, M.K., Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany

Recommended Citation:
Feng Z.,Bohleber P.,Ebser S.,et al. Dating glacier ice of the last millennium by quantum technology[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(18)
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