Key Laboratory of Western China's Environmental Systems (Ministry of Education);
College of Earth and Environmental Sciences;
Lanzhou University;
Lanzhou 730000;
China;
CSIRO Land and Water;
Private Bag 10;
Clayton South;
VIC 3169;
Australia;
College of Forestry;
Gansu Agricultural University;
Lanzhou 730070;
China;
Key Laboratory of Ecohydrology of Inland River Basin Gansu/Hydrology and Water Resources Engineering Research Center;
Northwest Institute of Eco-Environment and Resources;
Chinese Academy of Sciences;
Lanzhou 730000;
China;
precipitation chemistry; source assessment; sand dust event; Wushaoling Mountain;