Figure 7: Anthropogenic tracers in the HOLW structures.
From: A pervasive role for biomass burning in tropical high ozone/low water structures
Sample profiles from CONTRAST (a,b,d) and CAST (c) from the four flights shown in Fig. 2. O3 (red), CH3CN (grey), HCN (green) and C2Cl4 (light blue) are shown. O3 data are 10 s averages. CH3CN and C2Cl4 were not measured during CAST. CONTRAST HCN, CH3CN and C2Cl4 were sampled for 35 s at 2 min intervals. CAST HCN was sampled for 30 s. Vertical bars show the pressure range traversed during sampling.
