Table 2. Basic information of the eight datasets used in this study.

Data	Sources	Year	Resolution or scale
Global Annual PM2.5 Grids Datasets	http://sedac.ciesin.columbia.edu/	1998–2012	10000 m
SRTM UTM DEM	http://www.gscloud.cn	2003	90 m
Daily Surface Climate Variables of China	http://cdc.cma.gov.cn/home.do	2010	1000 m
Gridded GDP Dataset	http://www2.geodata.cn/index.html	2010	1000 m
Gridded Population Dataset	http://www2.geodata.cn/index.html	2010	1000 m
Global Land Cover 30 m Dataset	http://www.globallandcover.com/GLC30Download/index.aspx	2004–2010	30 m
Desert Distribution Mapset	http://www2.geodata.cn/index.html	2000	1:100000
Electronic Map		2010	1:10000