Analysis of the Spatial and Temporal Variation Characteristics of Surface Temperature in the Urumqi River Basin from 2000 to 2021
Land surface temperature(LST)is one of the important factors affecting ecological change.LST can indirectly monitor the ecological environment in the region.In this paper,Landsat TM/OIL remote sensing images were selected as data sources,and the single-window algorithm was used to quantitatively retrieve the land surface temperature(LST)of the Urumqi River basin in the five periods of 2000,2005,2010,2015 and 2021.The gravity shift model was used to analyze the spatial transfer characteristics of LST.Combined with land use data,the spatiotemporal differences of land surface temperature in different land use types were analyzed.The results show as follows:① LST increases significantly in the Urumqi River basin from 2000 to 2021,and the average LST increase rate in 22 years is 0.44℃/a.In terms of spatial pattern,the spatial distribution of LST varies greatly in the whole basin,and the temperature is mainly extremely high and high temperature.In 2021,the area of high temperature area accounts for 46%of the basin area.② From 2000 to 2021,the distribution of the center of gravity in each temperature re-gion has obvious transfer direction,and the center of gravity migration trajectory in each temperature re-gion is obviously close to the middle reaches.The increase of building land area is the main factor for the change of surface temperature in the basin.③ From 2000 to 2021,the contribution of surface thermal en-vironment in the study area was grassland,forest land,water body,cultivated land,unused land and con-struction land,and only construction land made a positive contribution.
land surface temperature inversioncontribution indexcenter of gravity shift model
NETL
NSTL
万方数据
