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Impact of the Urban heat island Effect on Ozone Pollution in Chengdu City,China

Chinese Geographical Science 2023年第6期33卷 1017-1032页

作者： SHI Haoyuan SONG Xingtao ZENG Shenglan Plateau Atmosphere and Environment Key Laboratory of Sichuan Province Chengdu Plain Urban Meteorology and Environment Observation and Research Station of Sichuan ProvinceSchool of Atmospheric SciencesChengdu University of Information TechnologyChengdu610225China

With the advancement of urbanization,the urban heat island effect and ozone pollution have become hot issues in urban *** urban heat island effect can impact ozone conversion,but its mechanism of action is *** this study,the effects of the urban heat island effect on ozone concentration in Chengdu City,China,were investigated by comparing the ozone concentration under different heat island levels with ozone data from March 2020 to February 2021 and the temperature and wind field data of ERA5-Land during the same *** results showed that:1)regarding the distribution characteristics,the ozone concentration in Chengdu presented a‘high in summer and low in winter’*** ozone concentration in summer(189.54µg/m^(3))was nearly twice that in winter(91.99µg/m^(3)),and the ozone diurnal variation presented a‘single peak and single valley’distribution,with a peak at 16:00.2)For the characteristics of the heat island effect,the heat island intensity in Chengdu was obviously higher in spring than in other seasons,and the diurnal variation showed a‘single peak and single valley’distribution,with the peak and trough values appearing at 9:00 and 17:00,***,the eastern part of Chengdu was a heat island,while the western and northwestern parts were mostly cold island.3)The correlation analysis between heat island intensity and ozone concentration showed a significant positive correlation but with a 7–8 h time *** air temperature was not the main factor affecting ozone *** heat island effect impacts the ozone concentration in two ways:changing the local heat budget to promote ozone generation and forming local urban wind,which promotes ozone diffusion or accumulation and forms different areas of low and high ozone values.

关键词： ozone pollution urban heat island effect heat island intensity lag correlation Chengdu,China

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Spatial planning for urban ventilation corridors by urban climatology

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Ecosystem Health and Sustainability 2020年第1期6卷 567-579,566页

作者： Kangkang Gu Yunhao Fang Zhao Qian Zhen Sun Ai Wang School of Architecture&Planning Anhui Jianzhu UniversityHefeiChina Collaborative Innovation Center of Urbanization Construction in Anhui Province Anhui Jianzhu UniversityHefeiChina

Ventilation corridors in cities can decrease air pollution and alleviate heat island problems but there remains a need to fully assess their *** urban managers have been able to take city-scale approaches to the construction of urban ventilation *** study aimed to introduced the Ventilation Corridor Planning(VCP)model,which is a multi-criteria evaluation method combined with a geographical information system(GIS)to determine where the ventilated environment is most ***,the VCP model took Bozhou,China as the research object and contained two scales,including mesoscale and local *** mesoscale scale,we got three outputs to build urban ventilation corridors,including 1)background wind environment,2)ventilation potential,3)heat island *** local scale,we used traditional computational fluid dynamics(CFD)model to verify the impact of VCP *** results revealed that compared with the traditional CFD model,the proposed VCP model has advantages in establishing a comprehensive evaluation *** addition,the application of VCP model in macro and micro also enhances the efficiency of ventilation corridor ***,this study introduced a effective modeling method to urban ventilation corridors planning,and provide a way to study the urban climate.

关键词： Ventilation corridors urban climatology wind environment ventilation potential heat island intensity

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