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

Research output: Contribution to journalArticle

Authors

  • Canfa Wang
  • Hongbin Zhang
  • Yi Yang
  • Deng Liu
  • Junhua Huang
  • Jingwei Cui
  • Shucheng Xie

Colleges, School and Institutes

External organisations

  • State Key Laboratory of Biogeology and Environmental Geology
  • China University of Geosciences, Wuhan
  • Research Institute of Petroleum Exploration and Development

Abstract

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°27′N, 110°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.

Details

Original languageEnglish
Pages (from-to)97-105
Number of pages9
JournalQuaternary Science Reviews
Volume192
Early online date1 Jun 2018
Publication statusPublished - 15 Jul 2018

Keywords

  • 3-Hydroxy fatty acid, China, Holocene, Monsoon, Novel proxy, Paleoclimatology, Speleothems