Impact of Urbanization on Air Temperature and Ground Temperature Change in Fujian Province
LIU Qian
JIN Kai
JIN Yansong
ZONG Quanli
LIU Chunxia
QIN Peng
CHEN Mingli
LIU Peiru
Abstract：Under the background of rapid urbanization,the urban thermal environment in China has deteriorated sharply.Studying the impact of urbanization on temperature helps to gain a deeper understanding of the characteristics of climate change in China.However,previous studies have mostly focused on either air temperature or ground temperature,and the differences in the impact of urbanization on the two are not fully understood.Based on the data of daily surface air temperature(hereafter referred to as air temperature)and ground surface temperature(hereafter referred to as ground temperature)from 20 meteorological stations in Fujian Province,this study applied trend analysis and the urban minus rural method to explore the influence of urbanization on the changes of air temperature and ground temperature in Fujian Province during 1987-2017.The results showed that(1)the changes in the two indexes exhibited a large spatiotemporal heterogeneity.In terms of regional average temperature,both annual and seasonal average temperatures showed an increasing trend,but the increase in ground temperature was generally higher than that of the air temperature.(2)The impacts of urbanization on the daily mean,maximum,and minimum air and ground temperatures were largely different.The influence of urbanization on the change of annual mean ground temperature(0.18℃·(10 a)-1,P<0.01)was greater than that on annual mean air temperature(0.08℃·(10 a)-1,P<0.05).Similarly,the impact on the average ground temperature changes in each season was also higher than that of air temperature.(3)In the regional annual mean ground temperature of Fujian Province calculated based on data from all stations,a significant urbanization bias was detected(0.06℃·(10 a)-1,P<0.05).This bias was more obvious in mean ground temperature in spring and summer.Therefore,the difference in change rates of air and ground temperatures in Fujian Province was related to the warming effects of urbanization.It is recommended that urbanization biases should be considered and eliminated in future studies to improve our understanding of regional climate and ecological changes.
Keywords：air temperatureground temperaturechange trendurbanizationasymmetry
Publication Date：2024-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 115-126 )