Page 264 - 《高原气象》2025年第3期

高 原 气 象 44 卷
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Ren G Y， 2005. Identifying and correcting urban bias for regional 2000 ［J］. Climatic and Environmental Research， 10（4）：
surface air temperature series of North China over period of 1961- 743-753.

Comparative Analysis on Air Temperature before and
after De-urbanization in Central China

1
ZHANG Yucui ， ZHAO Lin ， TAN Jianghong ， YAN Caixia ， QIN Pengcheng 3
2
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（1. Xiangyang Meteorological Bureau， Xiangyang 441021， Hubei， China；
2. National Climate Center， Beijing 100081， China；
3. Wuhan Regional Climate Center， Wuhan 430074， Hubei， China）
Abstract： The effects on surface air temperature series are different or more by urbanization with different lev‐
els， in order to clarify this difference in Central China， based on the daily air temperature data of 268 national
meteorological stations of Central China during 1964 -2023， the big city stations， general city stations and na‐
tional basic/reference stations were selected， meanwhile the reference stations were selected by the methods of
Empirical Orthogonal Function （EOF） and adjacent station selection. Then the calculation formulas of urbaniza‐
tion bias， contribution of urbanization bias and urbanization bias correction were constructed. The effects of ur‐
banization on annual and seasonal average temperature， average maximum and minimum temperature series of
big city， general city and national basic/reference stations were comparably analyzed in Central China in
1964 -2023 and 1979 -2023， and then the urbanization biases of the annual and seasonal temperature series in
above stations were corrected. The results showed that： in the two periods， the annual average temperature， an‐
nual average maximum and minimum temperature in city and basic/reference stations increased by urbanization，
and the urbanization biases of the three temperatures in above stations in 1979 -2023 were more than those in
1964 -2023， but the contributions of urbanization bias decreased in big city and basic/reference stations. As far
as average temperature was concerned， the effect of urbanization on annual average minimum temperature was
significantly higher than that in annual average maximum temperature in city and basic/reference stations in the
two periods； As far as season was concerned， it was the most significant effect on winter warming by urbaniza‐
tion in 1964 -2023， while it decreased obviously in 1979 -2023； As far as different level stations were con‐
cerned， it was the most significant effect of urbanization on big city stations in 1964 -2023， while the contribu‐
tion of urbanization bias of general city stations was 5. 6% higher than that in big city stations in 1979 -2023， the
urbanization biases of the annual average temperature in national basic/reference stations were 0. 040~
0. 041 ℃·（10a） in the two periods. After urbanization bias correction， the warming trends of annual average
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temperature， annual average maximum and minimum temperature reduced 0. 044 ℃·（10a）， 0. 010 ℃·（10a），
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0. 070 ℃·（10a） respectively in Central China in 1964 -2023； The areas with the most significant decrease of
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warming trend were the central east of Henan Province which were the areas with the most significant urbaniza‐
tion in Central China， as the rapid development of urban， the impacts on climate and environment should be put
specially attention.
Key words： homogeneity adjustment； urbanization bias； urbanization bias correction； air temperature series；
Central China