Some measurements of ground level NO, NO<sub>2</sub> and O<sub>3</sub> concentrations at an unpolluted maritime site

Abstract

Concentrations of NO, NO2 and O3 were measured at ground level at a coastal location in S.W. Ireland, using continuous, chemiluminescence analysis. The results confirm previous measurements of very low background concentrations of nitrogen oxides in background maritime air, ≤0.2 ppb for NO and 0.4 ppb for NO2. The transport and removal of NO2 in a continental air mass is also demonstrated.