To understand the temporal characteristics and vertical distributions of ammonia(NH3)and ammonium(NH4)in urban Beijing,we conducted ground-based and tower-based measurements of gaseous NH3 and submicr
Polycyclic aromatic hydrocarbons(PAHs)derivatives,such as oxygenated PAHs(OPAHs)and nitrated PAHs(NPAHs),some of which are more toxic and persistent than parent PAHs,have been ubiquitously detected in
Atmospheric deposition is considered as an important source of phosphorus(P)to the ecosystems where the productivity is significantly limited by P availability.PM2.5 samples were collected in a high a
Atmospheric aerosols have great impacts on the visibility,climate,and human health.Exposure to higher concentrations of aerosol particle near large point sources should be more concerned.