Holocene temperature and hydrological changes reconstructed by bacterial 3-hydroxy fatty acids in a stalagmite from central China

QUATERNARY SCIENCE REVIEWS

卷:192

Article

Wang, Canfa^1,2  Bendle, James A.²  Zhang, Hongbin¹  Yang, Yi¹  Liu, Deng¹  Huang, Junhua³  Cui, Jingwei⁴  Xie, Shucheng¹ 

[1] China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China

[2] Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England

[3] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China

[4] PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China

关键词: Holocene;    Paleoclimatology;    Novel proxy;    3-Hydroxy fatty acid;    China;    Monsoon;    Speleothems;   

DOI  :  10.1016/j.quascirev.2018.05.030

来源: Elsevier

【 摘 要 】

To achieve a sufficient understanding of the spatial dynamics of terrestrial climate variability, new proxies and networks of data that cover thousands of years and run up to the present day are needed. Here we show the first Gram-negative bacterial 3-hydroxy fatty acid (3-OH-FA) based temperature and hydrological records from any paleoclimate archive globally. The data, covering the last 9 ka before present (BP), are generated from an individual stalagmite, collected from Heshang Cave, located on a tributary of the Yangtze River, central China (30 degrees 27'N, 110 degrees 25'E; 294 m). Our results indicate a clear early-to-middle Holocene Climatic Optimum (8.0-6.0 ka BP) followed by a long-term monotonic cooling and increasing variability over the last 0.9 ka BP. The hydrological record shows two relatively long wet periods (8.8-5.9 ka BP and 3.0-0 ka BP) and one relatively dry period (5.9-3.0 ka BP) in central China. We show that 3-OH-FA biomarkers hold promise as independent tools for paleoclimate reconstruction, with the potential to deconvolve temperature and hydrological signals from an individual stalagmite. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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