气象科技进展2025，Vol.15Issue(2)：35-44,10.DOI:10.3969/j.issn.2095-1973.2025.02.005
南京市气温的空间变异及对量化冠层城市热岛强度的影响研究
The Spatial Variability of Air Temperature in Nanjing and Its Impact on Quantifying Canopy Urban Heat Island Intensity
摘要
Abstract
The heterogeneity of urban surface leads to high intra-city spatial variability of air temperature(Ta),impacting the accurate estimation of canopy urban heat island(CUHI)intensity and heat mitigation strategies.Using the hourly air temperature observation data from 153 automatic weather stations in Nanjing during the summer of 2019,the spatial variability of Ta and its influencing factors are analyzed,and the impact of Ta spatial variability on the calculation of the CUHI intensity is quantified.The results show significant summertime intra-city spatial variability of Ta in Nanjing,especially at nighttime,with the coefficient of spatial variation being 2.2 times that of daytime.Area fraction of buildings(R=0.44,p＜0.001)and vegetation coverage(R=-0.74,p＜0.001)are the most critical factors influencing the spatial patterns of daytime and nighttime Ta,respectively.In terms of building form factors,daytime Ta correlates significantly with the fraction of building roof projection area(R=0.35,p＜0.001),while nighttime Ta is more correlated with building height(R=0.69,p＜0.001).Population density effects on the spatial distribution of Ta are nonlinear.Ta is more sensitive to anthropogenic activities when population density is less than 150 people/km2.Uncertainty of CUHI intensity caused by the selection of urban and suburban stations is 0.15℃during the daytime and 0.28℃at nighttime,accounting for 44%and 37%of CUHI intensity(daytime:0.34℃,nighttime:0.76℃),respectively.When using the local climate zone(LCZ)method,the strongest CUHI intensity occurs in LCZ 10(industry,1.85℃)during the daytime and LCZ 1(dense high-rise building,0.61℃)at nighttime.When the building density is the same,the CUHI intensity in the high-rise building area is 0.55-1.15℃stronger than that in low-rise building area.For high-rise building,the CUHI intensity in the dense building area is 0.43℃stronger than that in the open areas.关键词
城市内尺度/冠层城市热岛/空间变异/局地气候区/建筑物Key words
intra-city scale/canopy urban heat island/spatial variability/local climate zone/building分类
大气科学引用本文复制引用
赖宇婧,王伟,任义方,吕恒,邰久,祝子涵,王博,温志文..南京市气温的空间变异及对量化冠层城市热岛强度的影响研究[J].气象科技进展,2025,15(2):35-44,10.基金项目
中国气象局城市气象重点开放实验室开放基金(LUM-2023-12) （LUM-2023-12）
国家重点研发计划(2019YFA0607202) （2019YFA0607202）
江苏省"333人才"领军型人才团队(BRA2022023) （BRA2022023）
