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Linking the 10 Be continental record of Lake Baikal to marine and ice archives of the last 50 ka: Implication for the global dust‐aerosol input
Author(s) -
Aldahan A.,
Possnert G.,
Peck J.,
King J.,
Colman S.
Publication year - 1999
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 - 10.1029/1999gl900469
Subject(s) - stadial , geology , oceanography , aerosol , ice core , precipitation , holocene , glacial period , paleontology , meteorology , geography
We present here a 10 Be profile from the continental sediments of Lake Baikal (the world's largest fresh water lake), which, for the first time, shows the ≈ 40 ka 10 Be enhancement and a pattern that strongly matches those from the marine and ice records for the last 50 ka. This finding provides a new horizon for global and regional correlation of continental archives. Additionally, our VADM‐predicted 10 Be production confirms and further strengthens a common global cause (geomagnetic field intensity) for the change in atmospheric 10 Be over the last 50 ka. We also show that most of the 10 Be inventory to the lake has been provided by riverine input, but with a significant addition from direct precipitation and dust‐aerosol fallout. We estimate a higher dust‐aerosol contribution of 10 Be during the Holocene and interstadial stage 3 (22–50 ka) as compared with the glacial period (12–22 ka).