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...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , , , , |
Format: | Report |
Language: | English |
Published: |
AMER GEOPHYSICAL UNION
2020
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Subjects: | |
Online Access: | http://ir.ieecas.cn/handle/361006/15586 https://doi.org/10.1029/2020GL090273 |
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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