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

Krivonogov, S.K.; Zhdanova, A.N.; Solotchin, P.A.; Kazansky, A.Y.; Chegis, V.V.; Liu, Z.; Song, M.; Zhilich, S.V.; Rudaya, N.A.; Cao, X.; Palagushkina, O.V.; Nazarova, L.B.; Syrykh, L.S.

Авторы: Krivonogov S.K., Zhdanova A.N., Solotchin P.A., Kazansky A.Y., Chegis V.V., Liu Z., Song M., Zhilich S.V., Rudaya N.A., Cao X., Palagushkina O.V., Nazarova L.B., Syrykh L.S.
Журнал: Geoscience Frontiers
Том: 14
Номер: 2
Год издания: 2023
Первая страница: 1
Последняя страница: 21
Номер статьи: 101518
DOI: 10.1016/j.gsf.2022.101518
Аннотация: 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 oppor-tunity to gain more knowledge about environmental changes in the West Siberian interior during theHolocene and about the evolution of the lake itself. Sediment cores obtained from the Yarkov sub-basin of the lake in 2008 have been comprehensively studied by a number of approaches including sed-imentology and AMS dating, pollen, diatom and chironomid analyses (with statistical interpretation ofthe 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 hypoth-esis that Lake Chany is very young, no older than 3.6 ka BP. Before that, between 9 and 3.6 ka BP, theChany basin was a swampy landscape with a very low sedimentation rate; it could not be identified asa 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 importantchanges in the understanding of the history of this large endorheic lake, as before it was envisioned as alarge lake with significant changes in water level since ca. 14 ka BP. In addition to hydrology, our proxiesprovide updates and details of the regional vegetation and climate change since ca. 4 ka BP in the West-Siberian forest-steppe and steppe. As evolution of the Chany basin is dependent on hydroclimaticchanges in a large region of southern West Siberia, we compare lake-level change and climate-changeproxies from the other recently and most comprehensively studied lakes of the region.
Добавил в систему: Казанский Алексей Юрьевич

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ЦЭМИ РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ЦЭМИ РАН

The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany, south-western Siberiaстатья

Прикрепленные файлы