| Инд. авторы: | Darin A., Kalugin I., Mordvinov A., Ovchinnikov D., Rakshun Y., Darin B.F., Maksimov M., Sorokoletov D. |
| Заглавие: | The search for periodicity in high-resolution paleoclimatic reconstructions last millennia Altai region |
| Библ. ссылка: | Darin A., Kalugin I., Mordvinov A., Ovchinnikov D., Rakshun Y., Darin B.F., Maksimov M., Sorokoletov D. The search for periodicity in high-resolution paleoclimatic reconstructions last millennia Altai region // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. - 2013. - P.793-796. - ISBN 9786197105032. - ISSN 1314-2704. |
| Внешние системы: | DOI: 10.5593/SGEM2013/BD4/S19.037; РИНЦ: 21908102; SCOPUS: 2-s2.0-84892588131; |
| Реферат: | eng: The method analytical microstratigraphy of lacustrine sediments allows to obtain paleoclimatic information fundamentally new quality was tested on a model object - Lake Teletskoe (Gorny Altai). Teletskoe lake bottom sediments were studied by scanning X-ray microprobe using synchrotron radiation from VEPP-3 (INP SB RAS, Novosibirsk) with an annual time resolution on the time interval of 1500 years. Data on the distribution of isotopes Cs-137, Pb-210, C-14 were used to create an age model: core depth - age. Using this model were constructed time series of sediment cores composition changes. To obtain the time series used a scanning X-ray analysis on synchrotron radiation with 100 micron spatial resolution. At each point of the core at the same time determines the content of more than 20 trace elements: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Y, Zr, Nb, Mo, Ba, Pb, Th, U. Terrigenous elements (Ti, V, Cr, Rb, Y, Th) reflect changes in precipitation in the catchment. Organogenic elements (Br, Zn, U) 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. Was found a set of cyclical changes in litho-geochemical indicators in the Lake Teletskoe sediments with periods of 3.5±0.3; 8.8±0.9; 18.9±2.0; 37.8±1.6; 86±10; 164±15; 346±30; 596±71 and 993 years. Found cycles can be used to predict climate change in nearest decades. © SGEM2013 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM. |
| Ключевые слова: | Climate change; Exhibitions; Geochemistry; Isotopes; Lakes; Lead; Rubidium; Titanium; Zirconium; Zinc; Uranium; Time series; Synchrotron radiation; Strontium; Sediments; Paleoclimatic reconstruction; Paleoclimatic information; Microstratigraphy; Late Holocene; Lake bottom sediments; Hilbert Huang Transformation; Geochemical indicators; Climatic cycles; Teletskoe lake; Sub-millimeter microstratigraphy; Late holocene; Geochemical indicators; Climatic cycles; Catchments; Climate change reconstruction; |
| Издано: | 2013 |
| Физ. характеристика: | с.793-796 |
| Конференция: | Название: 13th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2013 Даты проведения: 2013-06-16 - 2013-06-22 |