DBPapers
DOI: 10.5593/sgem2017/11/S01.020

FLUCTUATIONS OF THE WATER LEVEL OF LAKE TELETSKOYE, SOUTHERN SIBERIA, IN LATE HOLOCENE SHOWN BY THE BOTTOM SEDIMENT GEOCHEMISTRY AND SIBERIAN LARCH RADIAL GROWTH

D. Ovchinnikov, I. Kalugin, A. Darin, S. Ovchinnikov
Saturday 9 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 11, 159-166 pp, DOI: 10.5593/sgem2017/11/S01.020

ABSTRACT

We analyzed the dynamics of Lake Teletskoye water level and attempted to use data on bottom sediment geochemistry in combination with Siberian larch (Larix sibirica) tree-ring width chronology to reconstruct it for late Holocene. In particular, we studied the links among the water level characteristics, precipitation amount, bottom sediment geochemistry, and tree-ring width chronology available for Russian Altai. A correlation analysis revealed the annual water level fluctuations to correlate closely with mean annual temperature and annual precipitation (67% and 33%, respectively). The fluctuations exhibited a negative correlation with the regional tree-ring width chronology. As for the bottom sediments, two components were identified, one of which correlated closely with air temperature and the other with precipitation. Combining these three components, including tree-ring width chronology, provides new possibilities for a complex reconstruction of the lake water level fluctuations occurred during middle and late Holocene based on a regression model. A regression reconstruction model of the dynamics of the Lake Teletskoye water level was calculated for the last millennium. We defined 60-, 100-, 200-year cycles of water level variability in Teletskoye Lake and supposed that the observed fluctuations are due to long-term climatic changes. Of the greatest interest are the identified interdecadal and decadal climate-caused water level fluctuations, since they will enable to estimate indirectly, in the long term, climatic changes in southern Siberia for the past 2-5 thousand years.

Keywords: Lake Teletskoe, tree-ring width chronology, bottom sediment geochemistry, water level, late Holocene, Southern Siberia

PAPER DOI: 10.5593/sgem2017/11/S01.020, FLUCTUATIONS OF THE WATER LEVEL OF LAKE TELETSKOYE, SOUTHERN SIBERIA, IN LATE HOLOCENE SHOWN BY THE BOTTOM SEDIMENT GEOCHEMISTRY AND SIBERIAN LARCH RADIAL GROWTH

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