Title :
Detecting changing trajectory of urban heat island using Gaussian model in Beijing, China
Author :
Jinling Quan ; Yunhao Chen ; Wenfeng Zhan ; Ji Zhou
Author_Institution :
State Key Lab. of Earth Surface Processes & Resource Ecology, Beijing Normal Univ., Beijing, China
Abstract :
Changing trajectory of urban heat island (UHI) in Beijing from 2004 to 2008 was determined by Gaussian model using daily MODIS/LST data for exploring the general variation of UHI location and distribution characteristics. The results showed that the daytime UHI centroid annually moved along southwest-northeast direction during the period and seasonally varied with a northeast-southwest direction in a large range, while the nighttime UHI in April-June and October-December had a southward trend and that in other months moved along east-west direction near the city core. The spatial characteristics of the summer daytime UHI was primarily correlated with NDVI, while that of the nighttime UHI was mainly related to NIR/SW albedo in 2004-2005, but to NDVI after 2006. Finally, a considerable expanse of UHI was observed in the day of 2007, and a contrast seasonal change of UHI magnitude, extent and volume happened between the day and night.
Keywords :
Gaussian distribution; albedo; atmospheric temperature; land surface temperature; thermal pollution; AD 2004 to 2008; Beijing; China; Gaussian model; NDVI; NIR/SW albedo; UHI distribution characteristics; UHI location; changing trajectory detection; daily MODIS/LST data; daytime UHI centroid; summer daytime UHI; urban heat island; Educational institutions; Land surface; Land surface temperature; Meteorology; Remote sensing; Thermal pollution; Trajectory; Beijing; Gaussian model; Land surface temperature; MODIS; Urban heat island;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723669
