Variation Characteristics of PM10 Concentration in Provincial Capitals
 of Northwest China During 1991-2013
QI Donglin1,2,LI Xiaodong1,2,HU Aijun1,2,
Journal of Arid Meteorology . 2016, (4): 656 -662 .  DOI: 10.11755/j.issn.1006-7639(2016)-04-0656