摘要
大气宇宙成因核素^(7)Be和^(10)Be作为敏感的环境变化示踪剂,其在大气环境与全球气候变化研究中具有重要应用价值。本研究系统介绍了大气中^(7)Be和^(10)Be的分析技术与应用以及进展,基于两种核素在不同大气环境下的分布特征,重点探讨了其示踪大气痕量物质的物理迁移与化学转化过程的优势及潜力;详细介绍了利用西安加速器质谱中心开发的同靶样分析^(7)Be和^(10)Be方法,获得日分辨率气溶胶样品中的^(7)Be与^(10)Be高精度数据,及据此开展示踪平流层入侵与气溶胶传输变化过程研究取得的最新进展,并对未来开展青藏高原大气传输过程示踪研究进行了可行性分析。
Atmospheric cosmogenic^(7)Be and^(10)Be serve as sensitive tracers for environmental changes and have important applications in atmospheric tracing and global climate change research.This paper systematically introduces the analysis techniques and application research progress of^(7)Be and^(10)Be in the atmosphere.Among them,the current actual observation reports show that the concentration ranges of^(7)Be and^(10)Be in the global atmosphere are roughly(0.18~17.10)×10^(4)and(0.20~29.58)×10^(4)atoms/m^(3),respectively,and the^(10)Be/^(7)Be ratio is 0.45~4.38.And in the Chinese environment,the average contribution of suspended soil dust^(10)Be to surface aerosols^(10)Be can reach 5%to 24%.Based on the distribution characteristics of the two cosmogenic nuclides in different atmospheric environments,this study focuses on xploring their advantages and potential in tracing the physical migration and chemical transformation processes of trace substances in the atmosphere.And detailed the use of the same target sample analysis method for^(7)Be and^(10)Be developed on Xi'an Accelerator Mass Spectrometry Center by 3 MV accelerator mass spectrometry to obtain high-precision data of^(7)Be and^(10)Be with daily resolution,as well as the latest progress in tracing stratospheric invasion and aerosol transport changes based on this method.A feasibility of using^(7)Be and^(10)Be features to study the unique atmospheric transport mechanism in the Tibetan Plateau was analyzed.
作者
刘许柯
付云翀
LIU Xuke;FU Yunchong(State Key Laboratory of Loess Science,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;Xi'an Institute for Innovative Earth Environment Research,Xi'an 710061,China;Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application,Xi'an AMS Center,Xi'an 710061,China)
出处
《第四纪研究》
北大核心
2025年第6期1380-1393,共14页
Quaternary Sciences
基金
国家自然科学基金项目(批准号:12405336)
陕西省自然科学基础研究计划项目(批准号:2024JC-YBQN-0298)
陕西省创新能力支撑计划项目(批准号:2025RS-CXTD-036)共同资助。
