• 关键词：硝酸  臭氧

• 基金项目：

• 孙庆瑞
• 北京大学技术物理系

• 王美蓉
• 北京大学技术物理系

• 邵可声
• 北京大学技术物理系

• 白玉华
• 北京大学技术物理系

• 董国强
• 北京大学技术物理系

• 黄腾
• 北京大学技术物理系

• 摘要：采集了173个大气样品,测定其HNO₃含量,同时测定了O₃、NO₂、NH₃、t、RH,并对数据进行了多元逐步回归处理。结果表明,O₃与HNO₃相关最好。与HNO₃呈正相关的是O₃、NO₂、t;呈负相关的是NH₃、RH。通过HNO₃、NH₃的浓度,计算了平衡常数,证明在低湿度下大气中存在固态NH₄NO₃与气态HNO₃、NH₃的平衡。

• Abstract：The concentrations of HNO₃, NO₂, O₃, and NH₃ in 173 samples collected during 1984, 12-1986,7 were determined and the data were then analyzed using multiple regression method. The results indicated that HNO₃ concentration is significantly correlated to O₃ concentration. In addition, HNO₃ concentration increases with the increases in temperature and O₃ concentration and decreases with the increases in relative humidity and NH₃ concentration. Under low relative humidity condition, HNO₃ (g) and NH₃ (g) reach equilibrium with NH4NO₃ (s) in the atmosphere.

• Key words：air pollution  nitric acid  ozone.

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