S. Weimer

TL;DR: A unifying model framework describing the atmospheric evolution of OA that is constrained by high–time-resolution measurements of its composition, volatility, and oxidation state is presented, which can serve as a basis for improving parameterizations in regional and global models.

TL;DR: In this article, the authors report the development and first field deployment of a new version of the AMS, which is capable of measuring non-refractory aerosol mass concentrations, chemically speciated mass distributions and single particle information.

TL;DR: In this paper, real-time measurements of non-refractory submicron aerosols (NR-PM1) were conducted within the greater Alpine region (Switzerland, Germany, Austria, France and Liechtenstein) during several week-long field campaigns in 2002-2009.

TL;DR: In this paper, various types of combustion-related particles in the size range between 100 and 850nm were analyzed with an aerosol mass spectrometer and a differential mobility analyzer, which yielded a fractal dimension (D f ) of 2.09 ± 0.06 for biomass burning particles from the combustion of dry beech sticks, but showed values around three, and hence more compact particle morphologies, for particles from combustion of more natural oak.

TL;DR: Evidence is found that if nucleation occurs, sulfuric acid/water is the nucleating agent and that the production of nucleation particles even at high engine load can be suppressed by using low-sulfur fuel.