Vertical profiles of aerosol, NO2, H2O and HONO in Hefei and its surrounding agricultural fields
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Average aerosol vertical profiles exhibited a Gaussian shape above 100 m with maximum values of 0.67 km<sup>-1</sup> and 0.55 km<sup>-1</sup> at 300-400 m layer at AHU and CF, respectively. The distinct layered structure mainly attributed to regional transport. Average H<sub>2</sub>O and NO<sub>2</sub> vertical profiles all showed a Gaussian shape and an exponential shape at AHU and CF, respectively. Moreover, the diurnal evolution of H<sub>2</sub>O profiles performed one peak and bi-peak patterns at AHU and CF, respectively, whereas NO<sub>2</sub> at two stations all exhibited bi-peak patterns attributed to vehicle emissions. Average HONO vertical profiles showed an exponential shape and a Gaussian shape at AHU and CF, respectively. Higher HONO (> 0.05 ppb) above 1.0 km at 14:00-16:00 was observed at CF.
