Study on the Relation Between Urban Heat Island Effect and Vegetation Cover Index Using MODIS Image
Based on MODIS images of Shenyang in 2001 and 2008, land surface temperature was retrieved with split window algorithm, average surface temperature was valid. The Shenyang municipal districts of temperature was divided into four study, study spatial variation of urban heat island effect in Shenyang, and analysis relationships between urban heat island intensity and NDVI. The results showed that: (1) It has obvious heat island effect in Shenyang, showing an overall gradual expansion outward from the center of the spatial characteristics. Compared with 2001, urban heat island significantly expanded in 2008, the areas of increase two grade weak heat island effect increased significantly(129km2), the areas of 3 and 4 grade heat island effect relatively smaller increased, but a non-heat island area dropped sharply (reducing 857km2). (2) NDVI and urban heat island effect has significantly negative correlations, vegetation play a positive role in mitigating urban heat island intensity.
国家科技期刊平台
NSTL
万方数据
维普
