Measurement of Gaseous HONO, NHO sub(3), SO sub(2), HCl, NH sub(3), Particulate Sulfate and PM sub(2.5) in New York, NY

Air samples were collected in New York City at a location in Manhattan and one in the Bronx, and concentrations of gaseous nitrous oxide, nitric oxide, sulfur dioxide, hydrochloric acid, and ammonia, as well as particulate sulfate and PM sub(2.5), were measured. The study covered a period of approximately 2 yr. The resulting extensive concentration data are tabulated. High between-site correlations were found for HONO, HNO sub(3), HCl, SO sub(2), particulate SO sub(4), and PM sub(2.5), but for each specie, concentrations were slightly higher in Manhattan than in the Bronx. The concentrations of HNO sub(3), NH sub(3), HCl, and SO sub(4) were markedly higher during the summer, while concentrations of HONO and SO sub(2) were higher during the winter. The concentrations of PM sub(2.5) were highest in summer and lowest in spring. The concentration of NH sub(3) was found to be in large excess compared to the concentrations of the individual acids.