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The method of analytical microstratigraphy of lacustrine sediments allows to obtain paleoclimatic information fundamentally and new quality was tested on a model object -- Lake Teletskoe. In this paper, the Teletskoe lake bottom sediments were studied by scanning X-ray microprobe using synchrotron radiation from VEPP-3 with an annual time resolution on the time interval of 1,500 years. Data on the distribution of isotopes Cs-137, Pb-210, C-14 were used to create an age model. Using this model, the authors constructed time series of sediment cores composition changes. At each point of the core, they determine the content of more than 20 trace elements. Terrigenous elements reflect changes in precipitation in the catchment, while Organogenic elements are more associated with regional temperature changes. The ratio of Rb/Sr shows the size of the particles and associated with spring flooding dynamics. The resulting time series were processed by mathematical methods, including the Hilbert-Huang transformation.

A sediment column of 155 cm in length was retrieved by hammer corer in the deepest central part of lake Shira. Solid samples were prepared from the wet cores by freeze drying and impregnating with epoxy resin. The inter annual and inter seasonal variations in the trace element composition of annual layers are studied by means of X-ray scanning microanalysis with synchrotron radiation on the VEPP-3 and BESSY-II storage rings. Detailed experimental investigations of the internal structure of annual layers allowed the authors to create a lithological-geochemical model of sedimentation in Lake Shira, and to find climatically correlated minor elements. This model of the annual cycle of sedimentation was used to explain the periodic white layers with high Sr contents in the core. Thick 3 cm-5 cm light carbonate Sr-enriched intervals correspond to an extremely low level of the lake and are repeated every 450-550 years.