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| 南京市环境大气质量变化特征及防治对策建议 |
| Air Quality Change Characteristics and Air Pollution Control Countermeasures in Nanjing |
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| DOI： |
| 中文关键词: PM2.5 二次组分 区域性污染 演变特征 环境大气 南京市 |
| 英文关键词: PM2.5 Secondary components Regional pollution Evolutionary characteristics Environmental atmosphere Nanjing |
| 基金项目:江苏省环境监测科研基金资助项目（1707）；南京环保科技基金资助项目（201805） |
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| 中文摘要: |
| 21世纪初以来，南京空气质量演变总体经历了“煤烟型阶段”“复合型阶段”及“二次污染型阶段”。自2013年空气质量实施新标准以来，南京空气质量改善效果明显，相比2013年，2017年PM2.5质量浓度下降48.1%，重污染天数减少27 d，灰霾天数减少一半，能见度提高4 km。然而，2018年空气优良率同比下降3.5个百分点，PM2.5年均值同比上升50%，PM2.5中二次组分占比增加，O3污染仍呈加重趋势，区域性污染特征显著。根据当前南京市大气污染现状、特征及来源，重点针对PM和O3污染治理给出初步建议。 |
| 英文摘要: |
| Since the beginning of the 21st century， the air quality in Nanjing went through three stages：“coal smoke type”“complex type” and “secondary pollution type”. The air quality improved obvious in Nanjing since the new air quality standards implemented in 2013. Compared to 2013， the mass concentration of PM2.5 in 2017 decreased by 48.1%， the number of heavy pollution days decreased by 27 days， the number of hazy days decreased by half， and the visibility increased by 4 km. However in 2018，the fine rate of air quality decreased by 3.5% and the annual average of PM2.5 concentration increased by 5.0% compared with last year，the proportion of secondary components in PM2.5 increased， ozone pollution was still aggravating， the regional pollution characteristic was significant. Primary suggestions were made on particle matter and ozone pollution control according to the current situation， characteristics and sources of air pollution in Nanjing. |
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