摘要
为探索不同城市建筑形态对地表温度影响的梯度与城市间差异,研究以西安、郑州、济南为研究区,基于Landsat-8 TIRS影像和城市三维建筑数据,通过多元线性回归模型分析了这3个城市中建筑形态对不同季节地表温度在城市整体和梯度尺度上的影响并比较其差异性:(1)夏季和冬季中地表温度受城市建筑形态影响最大的城市分别为西安(R^(2)=0.414)和济南(R^(2)=0.300)。建筑覆盖率和平均建筑高度分别对3个城市夏季和冬季地表温度影响最大,且分别表现为正向与负向影响。(2)对建筑覆盖率进行梯度分级后,发现当覆盖率小于20%时,建筑体积密度对3个城市有较强的降温作用;当覆盖率处于20%—40%时,平均建筑高度显著降低3个城市地表温度;当覆盖率处于40%—60%时,天空可视因子对3个城市有一定增温作用;当覆盖率大于60%时,平均建筑高度大幅度降低济南地表温度。(3)西安、济南、郑州低层建筑的平均地表温度分别为9.5℃、7.7℃、6.1℃,3个城市的地表温度由低层到高层都呈下降趋势,且每个梯度内西安的地表温度均高于郑州和济南。研究结果表明:合理规划城市建筑形态,有利于缓解中心城市地表温度过高的现象。
To explore the gradient and difference of the influence of different urban building forms on LST,Xi’an,Zhengzhou,Jinan as the research area,based on Landsat 8 TIRS images and urban 3D building data.Based on the multiple linear regression model,the influences of building form on LST in different seasons in the three cities were analyzed and the differences were compared:(1)the cities with the largest influence on LST in summer and winter were Xi’an(R^(2)=0.414)and Jinan(R^(2)=0.300).The building coverage rate and average building height have the greatest impact on LST in summer and winter,respectively,with positive and negative impacts.(2)After the gradient classification of building coverage,it is found that when the coverage rate is less than 20%,the building volume density has a strong cooling effect on the three cities;When the coverage rate is 20%—40%,the average building height significantly reduces the surface temperature of the three cities.When the coverage rate is 40%—60%,the sky visible factor has a certain warming effect on the three cities,when the coverage rate is greater than 60%,the average building height greatly reduces the surface temperature of Jinan.(3)The average surface temperature of low-rise buildings in Xi’an,Jinan and Zhengzhou is 9.5℃,7.7℃and 6.1℃,respectively.The surface temperature of the three cities shows a downward trend from low-rise to highrise,and the surface temperature of Xi’an is higher than that of Zhengzhou and Jinan in each gradient.The research shows that rational planning of urban building form is beneficial to alleviate the phenomenon of high surface temperature in central cities.
作者
谭磊琪
周亮
李丽
袁博
胡凤宁
Tan Leiqi;Zhou Liang;Li Li;Yuan Bo;Hu Fengning(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Urban Land Resources Monitoring and Simulation of Ministry of,Natural Resources,Shenzhen 518034,China;Lanzhou Branch Chinese Academy of Sciences,Lanzhou 73000,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National,Geographic State Monitoring,Lanzhou 730070,China)
出处
《遥感技术与应用》
CSCD
北大核心
2022年第6期1492-1503,共12页
Remote Sensing Technology and Application
基金
甘肃省自然科学基金重点项目(21JR7RA281、21JR7RA278)
自然资源部城市国土资源监测与仿真重点实验室开放基金(KF-2020-05-067)
甘肃省2021年重点人才项目(2021RCXM073)
兰州交通大学(201806)优秀平台资助。
关键词
地表温度
城市形态
建筑指标
城市化
空间分布
Land surface temperature
Urban form
Building indicators
Urbanization
Spatial distribution
