Research on the Evolution of Urban Heat Island Effect from the Perspective of Time and Space:A Case Study of Jinchang City, Gansu Province
Under the background of urbanization and global warming, in order to explore the heat island prob-lem that may be caused by urban expansion in Jinchang City and the relationship between urban heat island effect and land use, the spatial and temporal evolution characteristics of urban heat island in Jinchang City, Gansu Prov-ince were studied and analyzed. The spatial and temporal evolution of urban heat island and land cover in Jinchang City in the past 20 years was analyzed by surface temperature inversion and supervised classification method. The study found that both urban heat island and cold island phenomena have certain development changes, and the change of land use distribution has a strong correlation with the distribution of urban heat island effect. The heat is-land effect in Jinchang City has evolved significantly in space and time in the past 20 years. The heat island prob-lem is mainly concentrated in urban areas such as construction land and unused land. The outline of the high tem-perature area of the heat island is basically consistent with the outline of the above two areas. The urban heat island effect of Jinchang City has obvious spatial and temporal evolution differences, and the heat island area gradually shifts from the north to the eastern urban cultivated land and built-up area.
万方数据
