The Response Of Land Surface Temperature To Characteristics Of Different Built-up Land Types

In recent years,the pace of urbanization and industrialization in China has accelerated,and some urban environmental problems have followed,affecting people's lives and health.As one of the typical urban microclimate,the phenomenon of urban thermal environment has aroused widespread concern of scholars at home and abroad.In this paper,the typical resource-based city Wu'an is selected as the research area,and the research zoning is divided into five categories,such as industrial and mining land,non-industrial and mining construction land,vegetation,cultivated land and water body,and based on LANDSAT remote sensing data,Radiative Transfer Equation(RTE)is used to invert the land surface temperature(LST).On the basis of dividing the spatial grid,the relationship between LST and landscape structure and construction land form is simulated by using linear regression model respectively,and the formation mechanism of thermal environment effect in resource-based cities is analyzed,and the following conclusions are obtained:(1)The average surface temperature of mining land is obviously higher than that of other surface temperatures,following the non-industrial land in Wu'an.The local temperature range is transitioned from medium temperature zone to higher temperature zone,the area of medium and high temperature area expands gradually dominates,and the phenomenon of urban thermal environment is prominent.(2)The response of surface temperature to landscape structure index is the most obvious,the overall correlation coefficient is high and the regression linear slope is larger.The change of landscape diversity caused by human disturbance activity is most likely to affect the surface temperature change is deeper,and the increase of diversity is not easy to return to the original state.(3)There was a significant positive correlation between LPI and the LST of different built-up land types.The LPI of the built-up land was expanded by an average of 50%,and the corresponding surface temperature increased by 0.05 ?.The surface temperature has a complicated response to the maximum shape index LSI of all kinds of construction land,and when dividing different built-up land types,the performance is weak positive correlation,when it involves the whole construction land,because of the large scale,limited by the grid division,there is a negative correlation trend.At the same time,when discussing shape index,the choice of scale is also very important,to avoid too much cutting of the original patch.The scale makes more influence on surface temperature.(4)There are differences in the response of surface temperature to the characteristics of different built-up land types,as a whole,non-industrial and mining land occupies a dominant position,which may be related to the scale of non-construction land,but industrial and mining land because of its special enterprise types and scales,corresponding to higher base temperature,urban thermal environment phenomenon is not easy to ease.In the evaluation unit of 1.5kmx1.5km,the effect on surface temperature is obvious when LPI of all kinds of construction land exceeds 20%,which is similar to the proportion of the whole construction land,so we should pay attention to the prevention and treatment of thermal effect in the later period.