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Variations of Extreme Temperature Event Indices in Six Temperature Zones in China from 1961 to 2020

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  • Jiajie Xin

    (Jiangxi Provincial Climate Center, Nanchang 330096, China)

  • Mingjin Zhan

    (Jiangxi Provincial Eco-Meteorological Center, Nanchang 330096, China
    Nanchang National Climate Observatory, Nanchang 330096, China)

  • Bin Xu

    (Jiangxi Provincial Climate Center, Nanchang 330096, China)

  • Haijun Li

    (Jiangxi Provincial Meteorological Center, Nanchang 330096, China)

  • Longfei Zhan

    (Jiangxi Provincial Climate Center, Nanchang 330096, China)

Abstract

In this study, eight extreme temperature event indices were calculated based on daily maximum, minimum, and mean temperature data recorded at 699 National Reference Stations in China during 1961–2020. The yearly change of mean temperature and the magnitude, frequency, and duration of extreme temperature events in six temperature zones were evaluated. All temperature zones had a trend of an increase in mean temperature (rate: 2.1–3.3 °C per 10 years), and the warming was more significant in the warm temperate zone and the Qinghai–Tibet Plateau zone (QPZ). For extreme temperature events, the extreme maximum and minimum temperatures in most temperature zones showed significant trends of increase, and the rates of increase were greater in the northern zones and QPZ. The rate of increase in extreme minimum temperature was substantially (up to three times) higher than the rate of increase in extreme maximum temperature in the same temperature zone; however, the finding was the opposite for the cold temperate zone (CTZ), which is the northernmost region of China. The rate of increase in extreme maximum temperatures was the greatest (0.35 °C per 10 years), whereas the rate of increase in extreme minimum temperatures was the smallest (0.17 °C per 10 years). The number of warm days/nights and the warm spell duration index also showed significant trends of increase that were most obvious in the southern zones and QPZ. In the tropical zone (TZ), which is the southernmost part of mainland China, the number of warm nights was only 15.3 days in 1961–1970, whereas it increased to 61.9 days in 2011–2020 (an increase of 303.9%). The rate of increase in warm nights in TZ (8.8 days per 10 years) was four times that in CTZ (2.2 days per 10 years). The number of cold days/nights and the cold spell duration index showed significant trends of decrease, with the greatest rates of reduction in QPZ and TZ. In evaluating the frequency of extreme temperature events, the amplitude of warming of the night index was found to be greater than that of the day index. In evaluating the duration of extreme temperature events, the variation of the cold index was found to be greater than that of the warm index. The notable asymmetries found in the variations of the minimum/maximum temperatures, day/night indices, and cold/warm spell durations in China are direct manifestations of global warming.

Suggested Citation

  • Jiajie Xin & Mingjin Zhan & Bin Xu & Haijun Li & Longfei Zhan, 2023. "Variations of Extreme Temperature Event Indices in Six Temperature Zones in China from 1961 to 2020," Sustainability, MDPI, vol. 15(15), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:15:p:11536-:d:1202571
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    References listed on IDEAS

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    1. Dana Habeeb & Jason Vargo & Brian Stone, 2015. "Rising heat wave trends in large US cities," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 76(3), pages 1651-1665, April.
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