Observation and simulation data of HONO in Coastal Regions of Fujian, China

Based on one-month measurement in the coastal areas of Fujian in southeast China, our study reported a unique diurnal pattern of HONO featuring with higher concentrations around noon. Utilizing an improved chemical transport model, we successfully simulated the observed HONO levels and temporal variations. We also quantified the formation mechanisms of HONO in coastal areas and its chemical impact on the formation of OH radicals and ozone using process analyses and sensitivity experiments.