Environmental changes in the northeast of the Buryat Republic during the Holocene post-Optimum: First results


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The results of a high-temporal-resolution geochemical and pollen analysis of bottom sediments in Lake Baunt (55°11′15″ N and 113°01′45″ E), located within the continuous permafrost zone, have made it possible to reconstruct the environmental and climate changes in northern Buryatia during the Holocene post-Optimum for the first time. Over the last almost 7000 years, the natural and climatic conditions in the northeast of Buryatia have not remained homogeneous. A relatively warm and dry climate occurred here at the end of the Holocene Optimum between 6900 and 6000 BP. Later, about 6000–1500/1000 BP, the climate became colder, long-term permafrost activated, and chemical weathering attenuated. The climate over the last 1500–1000 years was colder in general than the modern climate. The environmental indices have different values in sediments with respect to warm and cold intervals and reflect the sedimentation conditions what were controlled by climate changes.

Авторлар туралы

E. Bezrukova

Vinogradov Institute of Geochemistry, Siberian Branch; Institute of Archaeology and Ethnography, Siberian Branch

Хат алмасуға жауапты Автор.
Email: bezrukova@igc.irk.ru
Ресей, Irkutsk, 664033; Novosibirsk, 630090

A. Amosova

Vinogradov Institute of Geochemistry, Siberian Branch

Email: bezrukova@igc.irk.ru
Ресей, Irkutsk, 664033

V. Chubarov

Vinogradov Institute of Geochemistry, Siberian Branch

Email: bezrukova@igc.irk.ru
Ресей, Irkutsk, 664033

A. Finkelshtein

Vinogradov Institute of Geochemistry, Siberian Branch

Email: bezrukova@igc.irk.ru
Ресей, Irkutsk, 664033

N. Kulagina

Institute of the Earth’s Crust, Siberian Branch

Email: bezrukova@igc.irk.ru
Ресей, Irkutsk, 664033

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© Pleiades Publishing, Ltd., 2017