Classifying Aerosols Based on Fuzzy Clustering and Their Optical and Microphysical Properties Study in Beijing, China

Table 1

Information of the selected three AERONET sites.

Site name	Observing period	Number of records	Longitude; (degree)	Latitude; (degree)	Elevation; (meter)
Beijing	2001–2014	3418	116.381	39.977	92
Xianghe	2001, 2004–2012	2797	116.962	39.754	36
Xinglong	2006–2012	517	117.578	40.396	970