气候变化领域集成服务门户(CCPortal): Dating glacier ice of the last millennium by quantum technology

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DOI	10.1073/pnas.1816468116
	Dating glacier ice of the last millennium by quantum technology
	Feng Z.; Bohleber P.; Ebser S.; Ringena L.; Schmidt M.; Kersting A.; Hopkins P.; Hoffmann H.; Fischer A.; Aeschbach W.; Oberthaler M.K.
发表日期	2019
ISSN	0027-8424
起始页码	8781
结束页码	8786
卷号	116 期号:18
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.
英文关键词	Argon-39; Atom trap trace analysis; Glacier ice dating
语种	英语
scopus关键词	argon; age determination; argon trap trace analysis; Article; Austria; glaciation; glacier; priority journal; quantum chemistry; radiometric dating; stratigraphy; validation study
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158868
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 Cent...
推荐引用方式 GB/T 7714	Feng Z.,Bohleber P.,Ebser S.,et al. Dating glacier ice of the last millennium by quantum technology[J],2019,116(18).
APA	Feng Z..,Bohleber P..,Ebser S..,Ringena L..,Schmidt M..,...&Oberthaler M.K..(2019).Dating glacier ice of the last millennium by quantum technology.Proceedings of the National Academy of Sciences of the United States of America,116(18).
MLA	Feng Z.,et al."Dating glacier ice of the last millennium by quantum technology".Proceedings of the National Academy of Sciences of the United States of America 116.18(2019).