Study on the Temporal and Spatial Variation Characteristics of Surface Temperature in the Yangtze River Basin From 2000 to 2022
Land surface temperature(LST)is an important medium for the interaction between surface and at-mospheric energy,and plays an important role in maintaining the dynamic balance between the two.As one of the regions with a high level of comprehensive development in China,the summer LST in the Yangtze River Basin has increased significantly in recent years.In this study,multi-source data sets,such as MODIS data,meteoro-logical data and statistical data,were used to reveal the spatial and temporal changes,influencing factors and ther-mal environment characteristics of summer LST in the Yangtze River Basin from 2000 to 2022.The results show that the average summer LST in the Yangtze River Basin has increased significantly in the past 23 years.There is an upward trend in more than 80％of the areas with LST,of which the areas with significant and extremely sig-nificant increases account for about 31.34％of the entire basin,and the significant and extremely significant downward trends account for 0.37％.The variation trend of LST in the Yangtze River Basin has obvious regional differences,especially in the middle and lower reaches.The reason for the growth trend of LST may be related to NDVI and climatic factors.NDVI is the dominant driving factor of LST change,mainly to inhibit the rise of LST.The influence of temperature and precipitation on LST is the second.The former is dominated by positive,while the latter is dominated by negative.To a certain extent,the increase of sunshine and the decrease of relative hu-midity increase LST,while the increase of wind speed leads to the decrease of LST.The growth rate of LST in the Yangtze River Basin in the future is different under different scenarios,but the overall increase is extremely sig-nificant(P＜0.01).And the growth is more significant under high emission scenarios.The results of this study are helpful to understand the spatial and temporal changes of thermal environment in the Yangtze River Basin and its potential driving factors,and provide decision support for regional managers to cope with high temperature.
land surface temperaturetemporal and spatial changesdriving forceYangtze River Basinfuture trends
万方数据
维普
