Fig. 1: Comparison of EMAC model aerosol mass and number concentrations with StratoClim 2017 observations.
From: The impact of ammonia on particle formation in the Asian Tropopause Aerosol Layer
a Vertical profiles of aerosol constituents in the South Asian monsoon region (10–50∘N, 60–110∘E) for particle sizes between 0.09 and 1 μm. Model data are compared to all eight flights during StratoClim between 27 July and 10 August 2017. Boxplots represent the distribution of observed (StratoClim) and modelled (EMAC) mass concentrations of \({\,\text{NH}\,}_{4}^{+}\), \({\,\text{NO}\,}_{3}^{-}\), \({\,\text{SO}\,}_{4}^{2-}\), and organics in the ATAL. The central line of each boxplot denotes the median value, while the box boundaries indicate the interquartile range. The whiskers represent the range limits. b Vertical profiles of aerosol particle number concentrations in EMAC (red) and StratoClim (blue) over the South Asian monsoon region (10–50∘N, 60–110∘E) as a function of altitude for particle size greater than 6 nm, 10 nm, and 65 nm. The boxplots follow the same conventions as in (a). Both particle mass and number concentrations are referenced at normal temperature and pressure (NTP).
