Fig. 3: Experimental results on ambient aerosols and model results of Cl atoms budget.
From: Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2
A Experimental results on ambient aerosols in the dynamic chamber. Time series of 1-min average Cl2 and HONO. Ambient samples (cropped size: 60 mm × 60 mm, Fig. S7C) were illuminated at t = 0. The grey area indicates the period, which the xenon lamp was turned off, the solid black line shows the time at which the AM1.5 filter was used, the black dashed line indicates the time at which the AM1.5 filter was removed, and the solid red line indicates the time at which 250 ppbv O3 was added. The right inset: ambient observations of O3 and JNO2 during the ambient aerosol collection in October 2020. Experimental conditions: 75−83% RH and 298 K in air. B The model-calculated average diurnal profiles of sources and sinks of the Cl atom for period 4−14 September 2018. Upper right inset: the daytime average contribution from different sources to Cl atom. Bottom right inset: the average daytime contribution from different sinks to Cl atom.
