INFLUENCE OF URBAN BUILT ENVIRONMENT ON LAND SURFACE TEMPERATURE AND ITS SPATIAL RELATIONSHIP
The built environment in cities is the main influencing factor of land surface temperature(LST)variation.Taking Beilin District of Xi'an as an example,this paper uses the multi-source spatial data,as well as the multivariate logistic regression and spatial statistical models on a grid scale of 30 m × 30 m to deeply explore the influence of the urban built environment on the surface temperature and its spatial relationship at the micro scale.The results show that:(1)the spatial agglomeration characteristics of LST in Beilin District fall into two main types:"high-high(H-H)"and"low-low(L-L)",forming a heat island area in the northern part and a cold island area in the eastern part of the study area;(2)the main warming factors for the LST within a city are the normalized difference impervious surface index(NDISI)and building density(BD),and the cooling factors are road density(RD),percentage of water(PW),building height standard deviation(BHS),while the normalized difference vegetation index(NDVI)is less effective in cooling low temperature areas with water bodies and better in high temperature areas without water bodies;(3)the RD and BHS are negatively correlated with the LST,especially in high temperature areas;(4)the urban LST has substantial spatial dependence in space,and there is a significant spatial diffusion effect between the local and adjacent LSTs under the influence of the built environment.
built environmenturban heat islandland surface temperaturespatial heterogeneity
NETL
NSTL
万方数据
