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Spatio-Temporal Patterns of Warm-Season Ground Surface Temperature—Surface Air Temperature Difference over China Mainland

Author

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  • Yiwen Long

    (Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China)

  • Guoyu Ren

    (Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
    Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing 100081, China)

Abstract

Examining large-scale characteristics of the difference between ground surface temperature (GST) and surface air temperature (SAT) and its long-term trend will help understand land surface energy exchange and the effect of land-atmosphere interaction on climate change and variability. Based on a homogenized monthly dataset of GST and SAT from 1961 to 2018, this study analyzes the spatial distribution and long-term trend of the difference between ground surface temperature and surface air temperature (GST–SAT) in the warm season (April to October) over China mainland. The results show that the warm-season mean GST–SAT in the Qinghai-Tibet Plateau and the northwestern deserts have the largest GST–SAT. On average, the GST–SAT in China is the greatest in summer, with the maximum monthly value occurring in July. During 1961–2018, the warm-season mean GST–SAT undergoes a significant increasing trend (0.04 °C/10yr, p < 0.01), with the largest increase seen in mid-late spring (April and May), and the smallest increase in August. Spatially, the GST–SAT increases significantly in the northern region, decreases slightly in the southern region, and remains unchanged in the Qinghai-Tibet Plateau. The warm-season mean GST–SAT is significantly positively correlated with altitude and sunshine duration (R = 0.50, 0.40; p < 0.05), and significantly negatively correlated with relative humidity and precipitation (R = 0.48, −0.42; p < 0.05), in the country on a whole in the analysis period.

Suggested Citation

  • Yiwen Long & Guoyu Ren, 2023. "Spatio-Temporal Patterns of Warm-Season Ground Surface Temperature—Surface Air Temperature Difference over China Mainland," Land, MDPI, vol. 12(5), pages 1-18, May.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:5:p:1057-:d:1145332
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    References listed on IDEAS

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    1. Chen, Yilin & Shen, Huizhong & Zhong, Qirui & Chen, Han & Huang, Tianbo & Liu, Junfeng & Cheng, Hefa & Zeng, Eddy Y. & Smith, Kirk R. & Tao, Shu, 2016. "Transition of household cookfuels in China from 2010 to 2012," Applied Energy, Elsevier, vol. 184(C), pages 800-809.
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