[Mass concentration and major inorganic compositions of coastal aerosol in Qingdao]

Five times measurements of atmosphere aerosol were conducted from September, 1997 to November, 1998 at a coastal site of Qingdao. The mass concentrations of aerosol and their main soluble compositions were measured. The mass concentration and seasonal variation of the aerosol and its composition were discussed by different size. The PM2.5 (d < 2.5 microns) mass concentration accounts for half of the TSP, while the PM10 (d < 10 microns) mass concentration is about 75% of the TSP. More than 40% of the TSP mass concentration are from that of the soluble ions, among which SO4(2-), NO3- and NH4+ are the primary ones. SO4(2-), NH4+, NO3- are mainly in fine particles which suggest that they mainly existed in secondary aerosols. The mass concentrations of TSP in winter are much higher than those in other seasons.