This work was supported by the National Natural Science Foundation of China (Grant No. 29837190, 30230310, 20077004, and 20477004),and Beijing Natural Science Foundation (Grant No. 8991002 and 8041003).
Objective To investigate the seasonal characteristics and the sources of elements and ions with different sizes in the aerosols in Beijing. Methods Samples of particulate matters (PM2,5), PM10, and total suspended p...