On Diurnal Thermal Environment in Hefei from the Perspec-tive of LCZ System
Based on the local climate zone(LCZ)system,using Sentinel-2 and Landsat-8 imagery,this study analyzes the relationship between surface temperature and urban morphology in different LCZ categories during the day and night in the study area of the main urban area of Hefei City.The re-sults show that:(1)The LCZ map of the study area is constructed,and the largest proportion in the two different classifications is LCZ9 and LCZB/C.(2)There are obvious differences in LST between different LCZ categories,mainly between the building category and the natural category.The trend of day and night changes is consistent,and the temperature change amplitude in LCZ categories at night is smaller than that in the day.(3)The temperature change trend during the day and night is reflected as high-rise<middle-rise<low-rise,and open buildings<dense buildings.(4)The PCC analysis shows that LST is positively correlated with IBI and MNDWI,with strong correlation,and the correla-tion is r(day)>r(night).
local climate zoningHefei Citythermal environmentremote sensing
NETL
NSTL
万方数据
