Abstract
Wet deposited and airborne concentrations of ammonium, sulfate, nitrate, and chlorine ions, as well as gaseous nitric acid, hydrochloric acid, and ammonia were measured at a site in eastern England. Scavenging ratios based on aerosol-associated species and on aerosol plus gaseous airborne species are compared with literature data. Hydrochloric acid and HNO sub( 3) are shown to have a minor influence on wet deposition at the study site. Gaseous ammonia affects ground-level air chemistry markedly, but scavenging ratios for NH sub(4) super(<)BO> super(+) are low. Dry deposition of NH sub(3) accounts for about 40% of total nitrogen deposition to the ground, assuming a transport-limited deposition velocity for this species.