Department of Tourism and Geography;
Tongren University;
Tongren 554300;
China;
Institute of Surface-Earth System Sciences;
Tianjin University;
Tianjin 300072;
China;
State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
Guizhou 550081;
China;
Aerosol; pollution; Variation; characteristics; Sulfate-δ^34S; Total; suspended; particle;