Vegetation History and Precipitation Changes in the NE Qinghai‐Tibet Plateau: A 7,900‐years Pollen Record From Caodalian Lake

The northeastern Qinghai‐Tibet Plateau is strongly influenced by the East Asian summer monsoon (EASM), the Indian summer monsoon (ISM) and the westerlies. However, how these various circulation systems interacted in the region during the Holocene, and the nature of the associated environmental impac...

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Published in:Paleoceanography and paleoclimatology 2021-04, Vol.36 (4), p.n/a
Main Authors: Lv, Feiya, Chen, Jianhui, Zhou, Aifeng, Cao, Xianyong, Zhang, Xu, Wang, Zhenqian, Wu, Duo, Chen, Xuemei, Yan, Jingjing, Wang, Haipeng, Dong, Guanghui, Xu, Qinghai, Huang, Xiaozhong, Chen, Fahu
Format: Article
Language:English
Subjects:
Annual precipitation
Climate change
East Asian monsoon
Environmental impact
Evolution
Fossil pollen
Fossils
Holocene
Lake basins
Lakes
Mean annual precipitation
Monsoons
Pollen
Precipitation
Qinghai Lake
Quantitative precipitation reconstruction, vegetation
Summer
Summer monsoon
Vegetation
Westerlies
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Summary:The northeastern Qinghai‐Tibet Plateau is strongly influenced by the East Asian summer monsoon (EASM), the Indian summer monsoon (ISM) and the westerlies. However, how these various circulation systems interacted in the region during the Holocene, and the nature of the associated environmental impacts, are unclear and even controversial. Here we present a high‐resolution pollen record from Caodalian Lake since 7.9 ka (1 ka = 1,000 cal yr BP), which is used to reconstruct the regional vegetation history and climatic changes. In addition, we use a novel procedure for pollen‐based quantitative paleoclimatic reconstruction to characterize the evolution of precipitation at Caodalian Lake and nearby Qinghai Lake. The results suggest that mean annual precipitation (Pann) is the most significant factor controlling the fossil pollen record at both sites, and the Pann reconstructions are well correlated with each other (r = 0.72, p 
ISSN:2572-4517
2572-4525
DOI:10.1029/2020PA004126