Multi-proxy temperature reconstruction from the West Qinling Mountains, China for the past 500 years

PLoS One. 2013;8(2):e57638. doi: 10.1371/journal.pone.0057638. Epub 2013 Feb 22.

Abstract

A total of 290 tree-ring samples, collected from six sites in the West Qinling Mountains of China, were used to develop six new standard tree-ring chronologies. In addition, 73 proxy records were assembled in collaboration with Chinese and international scholars, from 27 publically available proxy records and 40 tree-ring chronologies that are not available in public datasets. These records were used to reconstruct annual mean temperature variability in the West Qinling Mountains over the past 500 years (AD 1500-1995), using a modified point-by-point regression (hybrid PPR) method. The results demonstrate that the hybrid PPR method successfully integrates the temperature signals from different types of proxies, and that the method preserves a high degree of low-frequency variability. The reconstruction shows greater temperature variability in the West Qinling Mountains than has been found in previous studies. Our temperature reconstruction for this region shows: 1) five distinct cold periods, at approximately AD 1520-1535, AD 1560-1575, AD 1610-1620, AD 1850-1875 and AD 1965-1985, and four warm periods, at approximately AD 1645-1660, AD 1705-1725, AD 1785-1795 and AD 1920-1945; 2) that in this region, the 20(th) century was not the warmest period of the past 500 years; and 3) that a dominant and persistent oscillation of ca. 64 years is significantly identified in the 1640-1790 period.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Altitude
  • China
  • Chronology as Topic
  • Climate*
  • Temperature
  • Time Factors
  • Trees*

Grants and funding

The study was jointly funded by the CAS Strategic Priority Research Program Grant (XDA05080801), the National Basic Research Program of China (973 Program) (2012CB957804) and the Specialized Research Fund for the Doctoral Program of Higher Education (20090211110025). Fengmei Yang was supported by the Forty-ninth batch of China Postdoctoral Science Foundation (2012T50829) and the China Meteorological Administration Drought Research Fund (IAM201109). Feng Shi was supported by the China Meteorological Administration Drought Research Fund (IAM201213) and the West Light Program for Talent Cultivation of Chinese Academy of Sciences. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.