Martin Heinritzi

TL;DR: In this article, the authors build a global model of aerosol formation using extensive laboratory-measured nucleation rates involving sulfuric acid, ammonia, ions and organic compounds, and a comparison with atmospheric observations show that nearly all nucleation throughout the present-day atmosphere involves ammonia or biogenic organic compounds.

TL;DR: Measurements from the Cosmics Leaving Outdoor Droplets chamber reveal the formation of neutral particles containing up to 14 SA and 16 DMA molecules, corresponding to a mobility diameter of about 2 nm, under atmospherically relevant conditions, revealing the fundamental processes involved in particle formation and growth.

TL;DR: How NOx suppresses particle formation is shown, while HOMs, sulfuric acid, and NH3 have a synergistic enhancing effect on particle formation, elucidate the complex interactions between biogenic and anthropogenic vapors in the atmospheric aerosol system.

TL;DR: Model simulations show that the pure biogenic particle formation mechanism has a much larger relative effect on CCN concentrations in the preindustrial atmosphere than in the present atmosphere because of the lower aerosol concentrations, and the cooling forcing of anthropogenic aerosols is reduced.

TL;DR: The growth rates are sensitive to particle curvature, explaining widespread atmospheric observations that particle growth rates increase in the single-digit-nanometer size range, and demonstrate that organic vapors can contribute to particle growth over a wide range of tropospheric temperatures from molecular cluster sizes onward.