Nitrate aerosol in the Netherlands

To assess the ecological mechanisms of the Dutch "nitrogen crisis," this study explores how nitrogen emissions turn into airborne particles before traveling and depositing elsewhere. Using air-monitoring tools and simulation chamber experiments, the research revealed that nitrate is primarily responsible for making these pollution particles grow larger. While computer models often only consider inorganic nitrate particles, evidence shows we must include organic nitrates because they behave differently in the atmosphere. The data revealed that nitrate particles originate mainly from Dutch coastal cities and ports compared to inland areas. Even though inland areas bring a lower number of nitrate particles, their higher biogenic emissions result in a higher fraction of organic nitrates. Seasonally, organic nitrate particles are found to form much more during hot summer pollution events than in winter. These findings show that to effectively reduce nitrogen pollution and protect nature, computer models and the resulting environmental policies must account for both inorganic and organic nitrates.