GDGTs-based quantitative reconstruction of water level changes and precipitation at Daye Lake, Qinling Mountains (central-east China), over the past 2000 years

Lin, Chen; Huang, Zhendong; Li-li, Niu; Dong, Weimiao; Xiao, Shuyu; Chen, Shengqian; Zhao, Jiaju; Wu, Duo; Zhou, Aifeng

doi:10.1016/j.quascirev.2021.107099

Cited by 12 publications

(2 citation statements)

References 51 publications

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“…The age-depth model 1 (Figure 2) was established using all ages subtracting a radiocarbon reservoir of 1,540 yeas validated by pollen concentrates and 210 Pb/ 317 Cs dating on the top of the core (Chen et al, 2021;. Considering that old carbon source may change during the last glacial period on Taibai Mountains (Zhang et al, 2016), we evaluated the 14 C dates at the depths of 110-150 cm (∼15-10 ka) using known distinct climate events (e.g., YD and BA) and high resolution records of δD wax at Daye Lake and δ 18 O s (Zhang et al, 2018) in this area (more details see Section 3 and Text S2 in Supporting Information S1).…”

Section: Chronologymentioning

confidence: 99%

Fire History in the Qinling Mountains of East‐Central China Since the Last Glacial Maximum

Zhang

Cui

Blockley

et al. 2023

Geophysical Research Letters

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Fire is an important component of ecosystem functioning and is closely related to climate, vegetation and biochemical cycles (Nolan et al., 2020;Pechony & Shindell, 2010). Fire frequency and intensity have increased with human-induced global warming in forested landscapes in recent years (Carter et al., 2018;Parks & Abatzoglou, 2020). Li et al. (2017) suggested fire-induced changes in terrestrial ecosystems have significantly increased the global average land surface temperature by 0.18°C in the 20th century. Mitigating the warming climate heavily depends on carbon storage in forests (Grassi et al., 2017;Yu et al., 2022). However, fire is the key disturbance factor in forest cover (Flannigan et al., 2009;Wu et al., 2014) and high-intensity fires usually occur in forested regions and transform forest communities from "carbon sinks" into "carbon sources" (Huang et al., 2020;Ying et al., 2018). The GFED3 model showed that CO 2 generated from deforestation fires accounts for about one third of the total CO 2 flux (Prentice et al., 2011). The fire mechanisms include a combination of factors operating on a range of timescales. The short observational period is not sufficient to fully capture the overall factors of fires occurrence in a region, it is thus crucial to study fire history at the longer time scales. This information can then provide detailed understanding on aspects of warming induced fire in the past, the balance of fuel source versus climate forcing, and the influence of anthropogenic activities on fires in forested regions.The Qinling Mountains are dominated by forest cover and are close to the boundary where subtropical vegetation in the south alternates with temperate vegetation in the north, making the mountains an important ecological zone in China (Yao et al., 2020). Frequent fire events have been recorded in recent decades, which influenced the

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Section: Chronologymentioning

confidence: 99%

Fire History in the Qinling Mountains of East‐Central China Since the Last Glacial Maximum

Zhang

Cui

Blockley

et al. 2023

Geophysical Research Letters

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“…Thaumarchaeota produce specific iGDGTs containing a cyclohexane ring, that is, crenarchaeol (Cren) and its isomer crenarchaeol' (Cren') (Schouten et al., 2013). 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). In this study, these proxies are validated in HGY, and then applied to reconstruct lake‐level history that is associated with hydrology in the southeast coast of China.…”

Section: Introductionmentioning

confidence: 99%

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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Distribution, potential sources, and response to water depth of archaeal tetraethers in Tibetan Plateau lake sediments

Kou

Zhu

et al. 2022

Chemical Geology

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GDGTs-based quantitative reconstruction of water level changes and precipitation at Daye Lake, Qinling Mountains (central-east China), over the past 2000 years

Cited by 12 publications

References 51 publications

Fire History in the Qinling Mountains of East‐Central China Since the Last Glacial Maximum

Fire History in the Qinling Mountains of East‐Central China Since the Last Glacial Maximum

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

Distribution, potential sources, and response to water depth of archaeal tetraethers in Tibetan Plateau lake sediments

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