Fig. 1: The initial growth rate and nanoparticle concentration during atmospheric NPF events at Hyytiälä and Beijing.
From: The key role of nanoparticle concentration gradient in aerosol initial growth
a, b the measured and theoretically predicted growth rates of freshly nucleated particles during new particle formation (NPF) events with and without the nanoparticle concentration gradient (NCG). The marker indicates the measured growth rate. The vertical uncertainty bar indicates the uncertainty in determining the growth rate for the measured temporal evolution of particle size distributions. The horizontal variation bar indicates the size range of particles used to determine the measured growth rate. The shaded area indicates contributions from sulfuric acid (SA) (gray) and oxygenated organic molecules (OOMs) with different volatilities. c, d the measured and theoretically predicted concentrations of particles larger than 3 nm (N>3nm). The uncertainty bar indicates an estimated 15% uncertainty in the measured concentration. The predicted N>3nm was obtained using the new particle formation rate and the survival probability corresponding to the predicted growth rates. Note that the curves for only sulfuric-acid-driven growth in (c) and (d) have been multiplied by 10 for visualization.
