PM_2.5/PM₁₀ Ratios in Eight Economic Regions and Their Relationship with Meteorology in China

Table 1

Eight economic regions in China.

Economic regions	Abbreviation	Provinces and municipalities
Northeast Region	NR	Liaoning, Jilin, Heilongjiang
North Coastal Area	NCA	Beijing, Tianjin, Hebei, Shandong
Eastern Coastal Area	ECA	Shanghai, Jiangsu, Zhejiang
South Coastal Area	SCA	Fujian, Guangdong, Hainan,
The Middle Yellow River	MYR	Shanxi, Inner Mongolia, Henan, Shaanxi
Middle reaches of the Yangtze River	MRYR	Anhui, Jiangxi, Hubei, Hunan
Southwest China	SC	Guangxi, Chongqing, Sichuan, Guiyang, Yunan
Big Northwest China	BNC	Tibet, Gansu, Qinghai, Ningxia, Xinjiang