生态科学2025，Vol.44Issue(5)：37-46,10.DOI:10.14108/j.cnki.1008-8873.2025.05.004
基于地表温度和空气温度的西安市热环境分异及其关系研究
Study on the difference of urban thermal environment and its relationship based on surface temperature and air temperature in Xi'an
摘要
Abstract
Under the pervasive influence of global warming,continuous growth of energy consumption and urban heat island effect,urban extreme heat has been significantly exacerbated,exerting profound impacts on public health and the socio-economy.The assessment of the increasingly prominent urban thermal environment has become a critical issue in urban climate and environmental research.Taking Xi'an as an example,we analyzed the urban thermal environment on a finer spatiotemporal scale using ECOSTRESS surface temperature data and meteorological station temperature data.A comparison was made between the spatiotemporal patterns of the thermal environment derived from these two distinct data sources,leading to the identification of a measurable relationship between AT and LST.The research showed that:(1)LST and AT in Xi'an had a similar characteristic of first increasing and then falling.The diurnal LST difference had a trend of first rising and then dropping,and the AT difference was relatively flat.And the maximum temperature difference between two temperatures could reach 21.11℃.Notably,during midday hours(12:00 and 14:00),the temperature differential between LST and AT was positive,whereas at other times it was negative.(2)LST and AT distributions were generally similar,showing a spatial pattern of high in the north and low in the south,high in the central city and low in the peripheral areas.The urban heat island area based on LST in Xi'an was mostly above 50%,with the proportion of extremely high and high temperature zones lower at night compared to during the day.When considering the AT,urban heat island areas consistently covered more than half of the total area,with nighttime heat island areas averaging slightly higher proportions than during the daytime.(3)There was a significant positive correlation between the LST and AT at each time in Xi'an,with the regression coefficient being bigger at night than during the day.The maximum regression coefficient was 0.637 at 4:00,while the minimum was 0.083 at 10:00.These findings hold significance in selecting urban thermal environment monitoring and quantification methods,and contribute to a deeper understanding of the quantitative relationship between LST and AT.关键词
ECOSTRESS/空气温度/城市热环境/GWR模型/西安市Key words
ECOSTRESS/air temperature/urban thermal environment/GWR model/Xi'an分类
地理科学引用本文复制引用
李琳钰,黄晓军,闫茜,赵凯旭,包微,纪王迪..基于地表温度和空气温度的西安市热环境分异及其关系研究[J].生态科学,2025,44(5):37-46,10.基金项目
国家自然科学基金项目(41971178) （41971178）
