Multidecadal- to Centennial-Scale Be-10 Variations in Holocene Sediments of Huguangyan Maar Lake, South China
Multidecadal- to Centennial-Scale Be-10 Variations in Holocene Sediments of Huguangyan Maar Lake, South China
复制标题
华南湖光岩玛珥湖全新世沉积物数十年至百年尺度Be-10变化
DOI：
10.1029/2019gl082863
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发表时间：
2019
影响因子：
5.2
通讯作者：
Zhang Li
中科院分区：
文献类型：
--
作者：
Tang Ling;Zhou Weijian;Wang Xisheng;Xian Feng;Du Yajuan;Zhou Jie;Chu Guoqiang;Zhao Guoqing;Zhang Li
本文报道了华南亚热带湖光岩玛珥湖的一个新的高分辨率全新世10 Be记录，旨在探测低纬地区的大气10 Be产生信号。在通过10 Be浓度与来自同一档案的气候代理之间的回归分析最小化气候影响之后，我们成功地区分了地磁场强度和太阳活动的变化，分别使用2,000年的低通和高通滤波，剩余10 Be记录（大气10 Be生产率的代理）。由此产生的10 Be导出的地磁场强度记录通常与地磁模型相当，并且太阳调制的10 Be信号与太阳活动代理表现出显着的相关性。这个低纬度玛珥湖沉积物中10 Be生产信号的保存突出了10 Be作为重建太阳活动和地磁场强度变化的工具的巨大未开发潜力和局限性。
We report a new high‐resolution Holocene10Be record from Huguangyan Maar Lake in subtropical‐tropical South China, aimed to detect the atmospheric10Be production signal in low‐latitude regions. After minimizing climatic effects by regression analyses between10Be concentration and climatic proxies from the same archive, we successfully distinguished variations in geomagnetic field intensity and solar activity using 2,000‐year low‐ and high‐pass filtering, respectively, of the residual10Be record (a proxy of the atmospheric10Be production rate). The resulting10Be‐derived record of geomagnetic field intensity is generally comparable with geomagnetic models, and the solar‐modulated10Be signal shows significant correlations with solar activity proxies. The preservation of10Be production signal in the sediments of this low‐latitude maar lake highlights the largely unexplored potential as well as limitations of10Be as a tool to reconstruct variations in solar activity and geomagnetic field intensity.