Figure 2: Ozone, water vapour and CO profiles in the TWP.
From: A pervasive role for biomass burning in tropical high ozone/low water structures

Sample profiles of 10 s averaged O3 (red), CO (grey) and H2O (blue) from four flights during CONTRAST (a,b,d) and CAST (c). Blue circles indicate measurements of H2O mixing ratios for which RH <20%. RH is with respect to water and with respect to ice for temperatures above and below 273 K, respectively. Vertical profiles have a characteristic horizontal length of ∼300 km.