Mongolian Dust Activity Over the Last 25 Kyr Predominantly Driven by the East Asian Winter Monsoon: Insights From the Geochemistry of Lake Tuofengling Sediments

Dust deposition in northeastern Asia since the Last Glacial Maximum has previously been studied using a variety of archives. However, the mechanisms driving variability in dust are less well constrained. Here, we present records of the Nd-Sr isotope and major element composition of sediments from La...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Zhang, Wenfang, Zhang, Enlou, Liu, Enfeng, Abell, Jordan T., Sun, Weiwei, Ni, Zhenyu, Chen, Rong, Cai, Yue, Meng, Xianqiang
Format: Report
Language:English
Published: AMER GEOPHYSICAL UNION 2023
Subjects:
dust deposition
East Asian Winter Monsoon
lake sediments
Sr-Nd isotopes
Northeastern China
ISOTOPIC CHARACTERISTICS
NORTH PACIFIC
CHINESE LOESS
ND
SR
PROVENANCE
GREENLAND
ACCUMULATION
TRANSPORT
RECORDS
Geology
Geosciences
Multidisciplinary
Crater Lake
Greenland
Pacific
Online Access:http://ir.nigpas.ac.cn/handle/332004/42452
http://ir.nigpas.ac.cn/handle/332004/42453
https://doi.org/10.1029/2023GL103633
Description
Summary:Dust deposition in northeastern Asia since the Last Glacial Maximum has previously been studied using a variety of archives. However, the mechanisms driving variability in dust are less well constrained. Here, we present records of the Nd-Sr isotope and major element composition of sediments from Lake Tuofengling, a crater lake located in northeastern China, over the past similar to 25 thousand years. The results indicate that the lithogenic fractions of the sediments are a mixture between aeolian dust and local volcanic detritus. Our provenance data suggest that the aeolian dust component is predominantly from the Mongolia Plateau, likely carried by the East Asian Winter Monsoon. Our isotope and calculated dust flux records exhibit similar changing patterns to proxies of global ice volume and the strength of Atlantic meridional overturning circulation, potentially implicating ice sheets and ocean circulation as the dominant drivers of the East Asian Winter Monsoon over this time interval.

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