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Analysis of Extreme Temperature Variations on the Yunnan-Guizhou Plateau in Southwestern China over the Past 60 Years

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Listed:
  • Kexin Zhang

    (School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China)

  • Jiajia Luo

    (School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China)

  • Jiaoting Peng

    (School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China)

  • Hongchang Zhang

    (Guizhou Green Development Strategy High-End Think Tank, Guizhou University of Finance and Economics, Guiyang 550025, China)

  • Yan Ji

    (School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China)

  • Hong Wang

    (School of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, China)

Abstract

Analysis of variations in 12 extreme temperature indices at 68 meteorological stations on the Yunnan-Guizhou Plateau (YGP) in southwestern China during 1960–2019 revealed widespread significant changes in all temperature indices. The temperature of the hottest days and coldest nights show significantly increasing trends, and the frequencies of the warm days and nights also present similar trends. The temperature of the coldest night has a significant and strong warming trend (0.38 °C/decade), whereas the frequency of frost days shows the fastest decrease (1.5 days/decade). Increases in the summer days are statistically significant, while a decreasing trend for the diurnal temperature range is not significant. Furthermore, there were significant differences in the changes of temperature indices between 1960–1989 and 1990–2019. Most parts of the YGP underwent significant warning, manifesting that the mountainous regions are relatively sensitive and vulnerable to climate change. The correlation coefficients between the temperature indices and various geographical factors (latitude, longitude, and height) reflect the complexity of regional temperature variability and indicate enhanced sensitivity of extreme temperatures to geographical factors on the YGP. It was also found that extreme temperatures generally had weaker correlations with the El Nino-Southern Oscillation, North Pacific Index, Southern Oscillation Index, North Atlantic Oscillation, and East Asian Summer Monsoon Index than with the South Asian summer monsoon index, Nino4 indices and Arctic Oscillation, and there were more insignificant correlations. Regional trends of the extreme temperature indices reflect the non-uniform temperature change over the YGP, which is due to the complex interaction between atmospheric circulation patterns and local topography. The results of this study have important practical significance for mitigating the adverse effects of extreme climatic changes, in particular for the YGP with its typical karst geomorphology and fragile ecological environment.

Suggested Citation

  • Kexin Zhang & Jiajia Luo & Jiaoting Peng & Hongchang Zhang & Yan Ji & Hong Wang, 2022. "Analysis of Extreme Temperature Variations on the Yunnan-Guizhou Plateau in Southwestern China over the Past 60 Years," Sustainability, MDPI, vol. 14(14), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:14:p:8291-:d:857109
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    References listed on IDEAS

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