Fig. 4: Comparison of monoterpene oxidation conditions across laboratory and atmospheric environments and their implications for HOM formation.
From: A mechanistic understanding of the varying yields of highly oxygenated organic molecules
a Summarizes the distributions of monoterpene reaction rates (MTreact) measured in chamber experiments (pink background), flow reactors (blue background), and field observations. The box whiskers and edges are 10%, 25%, 75%, and 90% percentiles from left to right, with the red line and blue dots indicating median and mean values. b Shows the simulated HOM yields from monoterpene ozonolysis at 278 K, together with laboratory data (blue-bordered markers denote CLOUD and JPAC measurements, while borderless markers correspond to other studies). The grey shaded regions indicate typical atmospheric ranges of NO concentrations and monoterpene oxidation rates, and the grey dots represent ambient observations from the SMEAR II station in Finland90. The grey dashed line indicates the convex polygonal boundary of the grey points. The dashed line in (b) indicate non-detectable levels of NO, NOx-free environment. Details of the previous laboratory studies26,35,56,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105 involved in the figure are provided in Supplementary Table 3.
