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Discrete Dynamics in Nature and Society
Volume 2016 (2016), Article ID 4269431, 7 pages
http://dx.doi.org/10.1155/2016/4269431
Research Article

Nonlinearity and Fractal Properties of Climate Change during the Past 500 Years in Northwestern China

1Yangzhou Meteorological Office, Yangzhou 225009, China
2Yangzhou University, Yangzhou 225009, China
3College of Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China
4National Climate Center, CMA, Beijing 100086, China

Received 25 November 2015; Accepted 2 March 2016

Academic Editor: Amit Chakraborty

Copyright © 2016 Shiquan Wan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

By using detrended fluctuation analysis (DFA), the present paper analyzed the nonlinearity and fractal properties of tree-ring records from two types of trees in northwestern China, and then we disclosed climate change characteristics during the past 500 years in this area. The results indicate that climate change in northwestern China displayed a long-range correlation (LRC), which can exist over time span of 100 years or longer. This conclusion provides a theoretical basis for long-term climate predictions. Combining the DFA results obtained from daily temperatures records at the Xi’an meteorological observation station, which is near the southern peak of the Huashan Mountains, self-similarities widely existed in climate change on monthly, seasonal, annual, and decadal timescales during the past 500 years in northwestern China, and this change was a typical nonlinear process.