KFU. Card publication. The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany, south-western Siberia

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THE HOLOCENE ENVIRONMENTAL CHANGES REVEALED FROM THE SEDIMENTS OF THE YARKOV SUB-BASIN OF LAKE CHANY, SOUTH-WESTERN SIBERIA

Form of presentation

Articles in international journals and collections

Year of publication

2023

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Authors, employees of KFU

Nazarova Larisa Borisovna, author

Palagushkina Olga Viktorovna, author

Bibliographic description in the original language

S.K. Krivonogov, , A.N. Zhdanova, P.A. Solotchin, A.Y. Kazansky, V.V. Chegis, Z. Liu, M. Song, S.V. Zhilich, N.A. Rudaya, X. Caom, O.V. Palagushkina, L.B. Nazarova ,L.S. Syrykh The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany, south-western Siberia Geoscience Frontiers, 2023, 14(2), 101518

Annotation

Lake Chany is the largest endorheic lake in Siberia whose catchment is entirely on the territory of Russia. Its geographical location on the climate-sensitive boundary of wet and dry landscapes provides an opportunity to gain more knowledge about environmental changes in the West Siberian interior during the Holocene and about the evolution of the lake itself. Sediment cores obtained from the Yarkov subbasin of the lake in 2008 have been comprehensively studied by a number of approaches including sedimentology and AMS dating, pollen, diatom and chironomid analyses (with statistical interpretation of the results), mineralogy of authigenic minerals and geochemistry of plant lipids (biomarker analysis.). Synthesis of new results presented here and published data provides a good justification for our hypothesis that Lake Chany is very young, no older than 3.6 ka BP. Before that, between 9 and 3.6 ka BP, the Chany basin was a swampy landscape with a very low sedimentation rate; it could not be identified as a water body. In the early lake phase, between 3.6 and 1.5 ka BP, the lake was shallow, 1.2–3.5 m in depth, and it rose to its modern size, up to 6.5 m in depth, during the last millennium. Our data reveal important changes in the understanding of the history of this large endorheic lake, as before it was envisioned as a large lake with significant changes in water level since ca. 14 ka BP. In addition to hydrology, our proxies provide updates and details of the regional vegetation and climate change since ca. 4 ka BP in the WestSiberian forest-steppe and steppe. As evolution of the Chany basin is dependent on hydroclimatic changes in a large region of southern West Siberia, we compare lake-level change and climate-change proxies from the other recently and most comprehensively studied lakes of the region

Keywords

Saline lake, Multiproxy study, Holocene, Climate Environment West Siberia

The name of the journal

Geoscience Frontiers

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=291872&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Nazarova Larisa Borisovna	ru_RU
dc.contributor.author	Palagushkina Olga Viktorovna	ru_RU
dc.date.accessioned	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	S.K. Krivonogov, , A.N. Zhdanova, P.A. Solotchin, A.Y. Kazansky, V.V. Chegis, Z. Liu, M. Song, S.V. Zhilich, N.A. Rudaya, X. Caom, O.V. Palagushkina, L.B. Nazarova ,L.S. Syrykh The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany, south-western Siberia Geoscience Frontiers, 2023, 14(2), 101518	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=291872&p_lang=2	ru_RU
dc.description.abstract	Geoscience Frontiers	ru_RU
dc.description.abstract	Lake Chany is the largest endorheic lake in Siberia whose catchment is entirely on the territory of Russia. Its geographical location on the climate-sensitive boundary of wet and dry landscapes provides an opportunity to gain more knowledge about environmental changes in the West Siberian interior during the Holocene and about the evolution of the lake itself. Sediment cores obtained from the Yarkov subbasin of the lake in 2008 have been comprehensively studied by a number of approaches including sedimentology and AMS dating, pollen, diatom and chironomid analyses (with statistical interpretation of the results), mineralogy of authigenic minerals and geochemistry of plant lipids (biomarker analysis.). Synthesis of new results presented here and published data provides a good justification for our hypothesis that Lake Chany is very young, no older than 3.6 ka BP. Before that, between 9 and 3.6 ka BP, the Chany basin was a swampy landscape with a very low sedimentation rate; it could not be identified as a water body. In the early lake phase, between 3.6 and 1.5 ka BP, the lake was shallow, 1.2–3.5 m in depth, and it rose to its modern size, up to 6.5 m in depth, during the last millennium. Our data reveal important changes in the understanding of the history of this large endorheic lake, as before it was envisioned as a large lake with significant changes in water level since ca. 14 ka BP. In addition to hydrology, our proxies provide updates and details of the regional vegetation and climate change since ca. 4 ka BP in the WestSiberian forest-steppe and steppe. As evolution of the Chany basin is dependent on hydroclimatic changes in a large region of southern West Siberia, we compare lake-level change and climate-change proxies from the other recently and most comprehensively studied lakes of the region	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Saline lake	ru_RU
dc.subject	Multiproxy study	ru_RU
dc.subject	Holocene	ru_RU
dc.subject	Climate Environment West Siberia	ru_RU
dc.title	The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany, south-western Siberia	ru_RU
dc.type	Articles in international journals and collections	ru_RU