Absence of a water depth signal in archaeal tetraether lipids from surface lake sediments in areas with intensive human activity: A case study from Daihai Lake, Inner Mongolia

Shen, Zhongwei; Duan, Yanwu; Zhang, Zhiping; Chen, Jie; Chen, Lin; Zhou, Aifeng; Liu, Jianbao; Chen, Fahu

doi:10.1016/j.chemgeo.2024.122055

Cited by 1 publication

(2 citation statements)

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“…A previous study has pointed that archeal tetraether lipids-based lake-level proxies may be influenced by human activities and terrigenous inputs (Shen et al, 2024). Human activities could result in eutrophication and lower/ bottom water hypoxia in lakes.…”

Section: Igdgt-inferred Lake Level and Climate Variabilitymentioning

confidence: 99%

“…Due to their different redox preference in living environments, the GDGT-0 and Cren abundances and ratio of GDGT-0/Cren have been found to correlate with water depth and thus can indicate lake-levels, although their indicative meanings are not always consistent (e.g., Baxter et al, 2021;Cao et al, 2021;L. Chen et al, 2021;Dang et al, 2016;Shen et al, 2024;H. Wang et al, 2019;Wu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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A Persistent Coast Mode of Precipitation in Southeast China Over the Last Millennium

Cao,

Chen,

Chu

et al. 2024

Geophysical Research Letters

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Instrumental data set have revealed several summer precipitation patterns in eastern China, being summarized as “tripole,” “dipole” and “coast” modes. The former two have been found to persist at different time scales, leaving the latter unclear in geological records. Here we present 1300‐year hydroclimate records in a tropical maar lake in the southern coast of China using archeal lipid GDGTs, which can reflect lower water redox conditions largely regulated by lake water depth. The down‐core GDGTs reveal a relatively drier condition during the medieval climate anomaly compared to the Little Ice Age, in‐phase with other records in southeast coast of China but opposite to the inland region, hence demonstrating a persistent “coast” mode in eastern China. The thermal state of equatorial Pacific is suggested to play an important role in shaping the “coast” mode by modulating the location and strength of the western Pacific subtropical high and tropical typhoons.

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Section: Igdgt-inferred Lake Level and Climate Variabilitymentioning

confidence: 99%