Vertical profile of mole fractions of five trace species - (a) acetylene, (b) hydrogen cyanide, (c) ethane, (d) argon, and (e) ethylene - in their gaseous phase (plotted with their standard deviations) with a resolution of 5 km. The argon profile has been shaded above 20 km because of unreliable retrieval (Section 3.3). Mole fractions at 53 and 49 km could be unreliable, since the measurements were affected by the pump overloading due to EC experiments via Leak 3.