| 广州城市大气HOx化学过程初步研究 |
| 摘要点击 1353 全文点击 1179 投稿时间：2003-10-17 修订日期：2003-12-28 |
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| 中文关键词 大气OH自由基 测量 大气光化学 源和汇 广州 |
| 英文关键词 atmospheric hydroxyl radicals measurement atmospheric photochemistry source and sink Guangzhou City |
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| 中文摘要 |
| 根据广州城市大气中OH自由基和其它污染物同步测量结果,计算了城市大气HOx(OH+HO2)化学过程中主要反应的转化速率,分析了城市大气化学过程的主要特征,并与清洁大气中的化学过程进行了对比.研究结果表明:广州城市大气中OH和HO2总的生成速率分别约为4.5×108分子/(cm3·s)和3.8×108分子/(cm3·s),比清洁大气中要快得多;城市大气中的OH净生成主要来自气相HNO2的光解,而OH的去除主要与VOCs、HCHO、NO2和CO反应,有别于清洁大气. |
| 英文摘要 |
| Simultaneous measurements of atmospheric hydroxyl radicals (OH) and other pollutants in Guangzhou city were carried out in July, 2000. The quantitative analysis of HOx reaction cycle during daytime in summer was made. The calculation results indicated that the total production rates of OH and HO2 were about 4.5×108 OH/(cm3·s) and 3.8×108 HO2/(cm3·s), respectively. The primary OH source in urban atmosphere was the photolysis of HONO, while the main OH sinks were the reactions of OH with VOCs, HCHO, NO2 and CO. The HOx chemistry in urban atmosphere is quite different from that in the remote clean atmosphere. |
