Linking the 10Be continental record of Lake Baikal to marine and ice archives of the last 50 ka:: Implication for the global dust-aerosol input

We present here a Be-10 profile from the continental sediments of Lake Baikal (the world's largest fresh water lake), which, for the first time, shows the approximate to 40 ka Be-10 enhancement and a pattern that strongly marches 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 Be-10 production confirms and further strengthens a common global cause (geomagnetic field intensity) for the change in atmospheric Be-10 over the last 50 ka. We also show that most of the Be-10 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 Be-10 during the Holocene and interstadial stage 3 (22-50 ka) as compared with the glacial period (12-22 ka).