【摘要】 利用2014年苏州地区观测资料对城市气溶胶与O₃之间的相互作用进行研究,结果表明:苏州市晴空指数（CI）与PM₁₀、PM_2.5呈显著负相关; PM₁₀、PM_2.5质量浓度每增加1μg/m3,晴天条件下白天向下短波辐射（DSR）分别下降1. 48 W/m2和1. 52 W/m2; DSR与O₃呈显著正相关; O₃与PM₁₀、PM_2.5呈负相关,表明气溶胶对O₃浓度存在衰减作用。2014年11月10日—12日个例研究表明,在到达地面的DSR几乎不变的情况下,气溶胶与O₃之间发生非均相化学反应,造成O₃浓度降低。2014年12月13日—14日个例研究表明,气溶胶通过对太阳辐射的消光作用,造成到达地面的DSR减弱,O₃浓度降低。更多还原

【Abstract】 The observation data from Suzhou were studied on the interaction between aerosol and ozone. The results showed that PM₁₀ and PM_2.5 were negatively correlated with clearness index. On average,in the daytime of fine weather,a 1 μg/m3 increase in PM₁₀ or PM_2.5 concentration was associated with 1. 48 W/m2 or 1. 52 W/m2 decrease in downward shortwave radiation（ DSR）,respectively. Ozone was significantly positive correlated with DSR,and negative correlated with PM₁₀ or PM_2.5. Aerosol had the effect on O₃ reduction. Case study showed that during the research period of November 10 th to 12 th,2014,when the DSR reaching to the ground was almost unchanged,heterogeneous chemical reaction happened between aerosol and O₃,resulting in decreasing of O₃ concentration. According to case study through December 13 th to 14 th,2014,the DSR on the ground and ozone decreased by aerosol’s extinction for solar radiation.更多还原