Distribution and Carbon Isotopic Composition of Long-Chain Leaf Wax n-Alkanes from Holocene Lake Sediments in the Altai Mountains | Sciact - CRIS-система Института катализа

Distribution and Carbon Isotopic Composition of Long-Chain Leaf Wax n-Alkanes from Holocene Lake Sediments in the Altai Mountains Научная публикация

Журнал

Quaternary International
ISSN: 1040-6182

Вых. Данные

Год: 2022, Том: 625, Страницы: 29-37 Страниц : 9 DOI: 10.1016/j.quaint.2022.04.008

Ключевые слова

n-alkanes; Carbon isotopic composition; Holocene moisture; Altai mountains; Arctic sea

Авторы

Li Qi ^1,2 , Zhao Jiayu ^1,2 , Xie Manman ³ , Dong Haowei ³ , Darin Andrei ⁴ , Darin Fedor ⁵ , Rakshun Yakov ⁵ , Su Youliang ⁶ , Wang Shuxian ³ , Sun Qing ³ , Chu Guoqiang ^1,6

Организации

1	Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
2	University of Chinese Academy of Sciences, Beijing, 10049, China
3	National Research Center of Geoanalysis, Beijing, 100037, China
4	Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Science, Novosibirsk, 630090, Russia
5	Budker Institute of Nuclear Physics, Siberian Branch of Russian Academy of Science, Novosibirsk, 630090, Russia
6	CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China

The Altai Mountains are located at the junction of Asia and Europe and pathways linking East Asian climate with the Arctic and North Atlantic. Here, we report a record of n-alkanes from the sediments of Shuanghu Lake in the Altai Mountains. In this forested region, the vegetation is dominated by C3 plants and the long-chain n-alkanes (C29–C31) in the lake sediments are predominantly derived from leaf wax lipids. The compound-specific carbon isotopic values of the long-chain n-alkanes are sensitive to regional moisture. Both the δ13C29–31 value and the Paq index show a decreasing trend since ∼9.0 kyr BP, implying an increase in moisture. This trend is punctuated by abrupt decreases in isotopic values centered at 8.2, 7.4, 5.6, 3.0, 2.0 and 0.2 kyr BP, which may indicate cold and wet events on decadal–centennial timescales. The Holocene hydrological patterns recorded at Shuanghu Lake are different from those from monsoonal Asia and they may reflect a response to decreasing Arctic sea ice cover that provided an enhanced moisture source and promoted increased heavy snowfall in the study region, or an increase in the temperature gradient and strength of the jet stream and extratropical cyclones at mid-latitudes, as proposed previously.

Li Q. , Zhao J. , Xie M. , Dong H. , Darin A. , Darin F. , Rakshun Y. , Su Y. , Wang S. , Sun Q. , Chu G.
Distribution and Carbon Isotopic Composition of Long-Chain Leaf Wax n-Alkanes from Holocene Lake Sediments in the Altai Mountains
Quaternary International. 2022. V.625. P.29-37. DOI: 10.1016/j.quaint.2022.04.008 WOS Scopus РИНЦ OpenAlex

Поступила в редакцию:	19 февр. 2022 г.
Принята к публикации:	12 апр. 2022 г.
Опубликована online:	17 апр. 2022 г.
Опубликована в печати:	10 июл. 2022 г.

Web of science:	WOS:000818781500003
Scopus:	2-s2.0-85128563650
РИНЦ:	48429328
OpenAlex:	W4224003889

БД	Цитирований
Scopus	3
Web of science	3
OpenAlex	2