High-Resolution Elemental Record From the Holocene Sediments of an Alpine Lake in the Central Altai Mountains: Implications for Arctic Sea-Ice Variations | Sciact - CRIS-system of Boreskov Institute of Catalysis

High-Resolution Elemental Record From the Holocene Sediments of an Alpine Lake in the Central Altai Mountains: Implications for Arctic Sea-Ice Variations Full article

Journal

Earth and Space Science
, E-ISSN: 2333-5084

Output data

Year: 2021, Volume: 8, Number: 8, Article number : e2021EA001810, Pages count : 13 DOI: 10.1029/2021EA001810

Tags

Altai Mountains; Arctic sea ice; bromine; cyclic climate variations; Rb/Sr ratio; synchrotron radiation X-ray fluorescence

Authors

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

Affiliations

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

It is well known that Arctic sea ice and Arctic amplification have played an important role in recent climate change in middle to high latitudes of the Northern Hemisphere. We present a high-resolution elemental data set, spanning the past 9,000 years, obtained using in-situ synchrotron radiation X-ray fluorescence measurements of a lake sediment core from Lake Shuang in the Altai Mountains. Based on calibration against the local instrumental climatic record, the Rb/Sr ratio of the sediments is interpreted as an indicator of weathering intensity, which is related to precipitation and temperature variations. There is very little bromine in the granites and moyites in the catchment of Lake Shuang, and the sedimentary Br is derived primarily from wet deposition originating from precipitation and enriched by biogenic processes in this open lake system. The Br variation is positively correlated with local precipitation. The Rb/Sr and Br time series show distinct decadal-scale to millennial-scale cycles that are similar to those of Arctic sea-ice variations, which implies the important role of Artic sea ice in modulating environmental change at Lake Shuang. Our results support a previous suggestion that sea ice loss would cause an increase in atmospheric water vapor content in the Arctic, resulting in the frequent incursion of cold air masses from the Arctic into middle latitudes, and leading to increased snow cover and precipitation, and vice versa.

Sun Q. , Daryin A. , Zhao J. , Xie M. , Darin F. , Rakshun Y. , Su Y. , Dong H. , Chu G. , Wang S.
High-Resolution Elemental Record From the Holocene Sediments of an Alpine Lake in the Central Altai Mountains: Implications for Arctic Sea-Ice Variations
Earth and Space Science. 2021. V.8. N8. e2021EA001810 :1-13. DOI: 10.1029/2021EA001810 WOS Scopus OpenAlex

Submitted:	Apr 18, 2021
Accepted:	Jun 16, 2021
Published online:	Jul 14, 2021
Published print:	Aug 1, 2021

Web of science:	WOS:000691103000021
Scopus:	2-s2.0-85113426433
OpenAlex:	W3181913962

DB	Citing
Scopus	6
OpenAlex	7
Web of science	6