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Multidecadal‐ to Centennial‐Scale 10 Be Variations in Holocene Sediments of Huguangyan Maar Lake, South China
Author(s) -
Tang Ling,
Zhou Weijian,
Wang Xisheng,
Xian Feng,
Du Yajuan,
Zhou Jie,
Chu Guoqiang,
Zhao Guoqing,
Zhang Li
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082863
Subject(s) - maar , earth's magnetic field , holocene , geology , climatology , subtropics , proxy (statistics) , atmospheric sciences , oceanography , paleontology , volcano , physics , quantum mechanics , fishery , magnetic field , biology , machine learning , computer science
We report a new high‐resolution Holocene 10 Be record from Huguangyan Maar Lake in subtropical‐tropical South China, aimed to detect the atmospheric 10 Be production signal in low‐latitude regions. After minimizing climatic effects by regression analyses between 10 Be 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 residual 10 Be record (a proxy of the atmospheric 10 Be production rate). The resulting 10 Be‐derived record of geomagnetic field intensity is generally comparable with geomagnetic models, and the solar‐modulated 10 Be signal shows significant correlations with solar activity proxies. The preservation of 10 Be production signal in the sediments of this low‐latitude maar lake highlights the largely unexplored potential as well as limitations of 10 Be as a tool to reconstruct variations in solar activity and geomagnetic field intensity.