Holocene Monsoon Change and Abrupt Events on the Western Chinese Loess Plateau as Revealed by Accurately Dated Stalagmites

Here we present, to date, the highest-resolved (similar to 5 years) and most precisely dated Holocene monsoon climate reconstruction for the western Chinese Loess Plateau based on five replicated stalagmite delta O-18 records from Wuya Cave, eastern Gansu, China. Our record suggests the wettest peri...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Tan, Liangcheng, Li, Yanzhen, Wang, Xiqian, Cai, Yanjun, Lin, Fangyuan, Cheng, Hai, Ma, Le, Sinha, Ashish, Edwards, R. Lawrence
Format: Report
Language:English
Published: AMER GEOPHYSICAL UNION 2020
Subjects:
Asian summer monsoon
abrupt events
speleothem
Loess Plateau
northern China
Holocene
NORTH-ATLANTIC CLIMATE
KA BP EVENT
HIGH-RESOLUTION
PRECIPITATION VARIATIONS
TIBETAN PLATEAU
YELLOW-RIVER
RECORD
VARIABILITY
CAVE
Geology
Geosciences
Multidisciplinary
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/15587
http://ir.ieecas.cn/handle/361006/15588
https://doi.org/10.1029/2020GL090273
Description
Summary:Here we present, to date, the highest-resolved (similar to 5 years) and most precisely dated Holocene monsoon climate reconstruction for the western Chinese Loess Plateau based on five replicated stalagmite delta O-18 records from Wuya Cave, eastern Gansu, China. Our record suggests the wettest period occurred between 10,500 and 6,600 a BP in this region. After this period, the amplitude of Asian summer monsoon decadal-scale variability progressively increased likely in response to increasing ENSO frequency since the middle Holocene. Our study reveals similar asymmetric centennial-scale double-plunging structures of the 8.2, 5.5, and 2.8 ka events in the western Chinese Loess Plateau, suggesting a possible role of solar activity whose impact was amplified around 8.2 ka BP by the meltwater flood. In contrast, the 4.2 ka event exhibit gradually declining monsoon rainfall with centennial- to decadal-scale fluctuations.

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