Figure 2
From: Model demonstrates functional purpose of the nasal cycle
Inter-airway temperature (Ta), absolute humidity (AH) and ASL water equivalent height (He,ASL) distribution from end of inhalation to maximal change during exhalation. Arrows indicate direction of change. Non-dimensional airway position (X/L), defines the ratio of distance from anterior nasal valve to the posterior choanae within the two airways. 
= commencement of exhalation, 
= intermediate value, 
= maximal increase during exhalation. ∆ = Keck et al. [7], ○ = Wiesmiller et al. [57], □ = Lindemann et al. [59].