Figure 4
From: Large unexplained suite of chemically reactive compounds present in ambient air due to biomass fires
Diel box (25th–75th percentiles) and whiskers (10th, 90th percentiles) profiles of the measured concentrations of (a–d) acetonitrile, sum of C-9 aromatics, acetaldehyde and acetone, in the CFI (red) and NCFI (black) periods and (e–h) hydroxyacetone, butane-2,3-dione, nitromethane and isocyanic acid in the extended CFI and NCFI periods of summer 2013.
