Effects of oligomerization and decomposition on the nanoparticle growth: a model study

Abstract. The rate at which freshly formed secondary aerosol particles grow is an important factor in determining their climate impacts. growth of atmospheric nanoparticles may be affected by particle-phase oligomerization and decomposition condensing organic molecules. We used the Model for Oligomerization Decomposition Nanoparticle Growth (MODNAG) to investigate potential significance these effects. This was done conducting multiple simulations with varying reaction-related parameters (volatilities involved compounds reaction rates) using both artificial ambient measured gas-phase concentrations vapors define vapors. While our study does not aim providing information on any specific reaction, results indicate that reactions have significant affect nanoparticle growth. In one-third a volatility basis set bin allowed go through reactions, maximum increase rates 71 % decrease 26 compared base case no were assumed take place. These highlight importance investigating increasing understanding reactions.