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Regional features of the temperature trend in China based on Empirical Mode Decomposition

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Abstract

By the Empirical Mode Decomposition method, we analyzed the observed monthly average temperature in more than 700 stations from 1951–2001 over China. Simultaneously, the temperature variability of each station is calculated by this method, and classification chart of long term trend and temperature variability distributing chart of China are obtained, supported by GIS, 1 km×1 km resolution. The results show that: in recent 50 years, the temperature has increased by more than 0.4°C/10a in most parts of northern China, while in Southwest China and the middle and lower Yangtze Valley, the increase is not significant. The areas with a negative temperature change rate are distributed sporadically in Southwest China. Meanwhile, the temperature data from 1881 to 2001 in nine study regions in China are also analyzed, indicating that in the past 100 years, the temperature has been increasing all the way in Northeast China, North China, South China, Northwest China and Xinjiang and declining in Southwest China. An inverse ‘V-shaped’ trend is also found in Central China. But in Tibet the change is less significant.

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Authors and Affiliations

  1. Shaanxi Climate Center, Xi’an, 710015, China

    Xian Sun, Xiaoxia Cheng & Chuangye Jiang

  2. The School of Geographic Sciences, Nanjing Normal University, Nanjing, 210097, China

    Zhenshan Lin

Authors
  1. Xian Sun
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  2. Zhenshan Lin
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  3. Xiaoxia Cheng
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  4. Chuangye Jiang
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Corresponding author

Correspondence to Xian Sun.

Additional information

Foundation: National Natural Science Foundation of China, No.40371044

Author: Sun Xian (1969–), Ph.D, specialized in climate change, climate applied research.

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Sun, X., Lin, Z., Cheng, X. et al. Regional features of the temperature trend in China based on Empirical Mode Decomposition. J. Geogr. Sci. 18, 166–176 (2008). https://doi.org/10.1007/s11442-008-0166-6

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  • DOI: https://doi.org/10.1007/s11442-008-0166-6

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