Fig. 6
From: Microscale pH variations during drying of soils and desert biocrusts affect HONO and NH3 emissions
Nitrogen gaseous emission dynamics under various conditions. Nitrous acid (HONO) and ammonia (NH3) gaseous emissions during biocrust drying as a function of time. Typical simulations of different conditions in drying patterns (solid lines: slow drying, dashed lines: fast drying), and atmospheric NH3 levels (low: 5 ppb, high: 20 ppb) are denoted as slow/high drying with low-/high-NH3 level, S–L (green), S–H (blue), F–L (orange), and F–H (red), respectively. The simulated dynamics of a HONO and b NH3 emissions are plotted during c 24 h of drying at two rates. Hydration conditions are expressed in percent of water-holding capacity. Lines are averaged values of simulations (n = 8) and shaded areas indicate ±1 standard deviation
