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| 南京市典型臭氧污染过程的激光雷达垂直观测解析 |
| Analysis a Typical O3 Pollution in Nanjing using Ozone Laser Radar |
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| DOI： |
| 中文关键词: 臭氧 污染过程 激光雷达 空气质量 南京市 |
| 英文关键词: O3 Pollution process Laser radar Air quality Nanjing |
| 基金项目:江苏省科技支撑计划基金资助项目（BE20140602）；江苏省环保科研基金资助项目（2016001）；江苏省环境监测科研基金资助项目（1601）；南京市环保科研基金资助项目（201602）；南京市环保科研基金资助项目（201709） |
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| 中文摘要: |
| 利用臭氧激光雷达对南京市一次典型臭氧污染过程连续观测，分析该典型臭氧污染过程中近地面和高空臭氧的变化规律、污染的发生过程与成因。结果表明：在夏季高温、风速低、冷空气影响锋前的静稳天气下，近地面臭氧的循环生成和夜间高空残留的臭氧在湍流作用下混合并积累造成该污染过程；近地面和低层臭氧浓度具有明显的日变化趋势，单峰型特征，而高空臭氧浓度无明显日变化特征，夜间维持高值；边界层高度上下始终存在臭氧高值带，厚度达数百米；正午至午后时段，各垂直高度上臭氧浓度混合均匀，随高度基本无梯度变化，达到近地面至高空1.5 km的臭氧高污染层覆盖。 |
| 英文摘要: |
| In this paper, Ozone Laser Radar was used for continuous observation of a typical O3 pollution process in the summer of Nanjing, the variation of O3 in near surface air and at high altitude, the pollution causes and process were discussed. Results showed that this typical O3 pollution was caused by the mixture and accumulation of recycled O3 in near surface air and residual O3 at night sky under the effects of turbulence at hot calm weather and at front before cold air arriving. The O3 concentration in near surface air and at low altitude had a distinct daily variation tendency with only one peak feature, while the O3 concentration at high altitude did not, it kept at a high value at night. High O3 concentration zone existed at the boundary layer, about hundreds of meters thick. At noon and afternoon, O3 concentration was evenly mixed at all vertical heights, no gradient changed with height. High level of O3 pollution layer was from near ground to 1.5 km high. |
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