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ANALYSIS OF OZONE POLLUTION SITUATION, CAUSES AND COUNTERMEASURES IN CHANGSHA IN 2019—2021
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摘要: 臭氧(O3)对生态环境质量影响程度不断加深,统计发现,2019—2021年长沙市O3超标的高发时间为夏、秋季,总辐射量≥0.85 MJ/m2、最高气温≥32 ℃、相对湿度≤65%为长沙市O3生成较为有利的气象条件。利用基于观测的模型(OBM)模拟了污染高值时段长沙市3个站点区域的最优达标减排方案:环保学院站点区域应单独削减40%VOCs;高新区环保局站点区域应单独削减21%VOCs;马坡岭站点区域不具备达标条件,但单独削减VOCs可使O3浓度下降速度最快。因此在不利的气象条件下,有针对性地设计科学的减排方案,可以显著降低O3浓度。
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关键词:
- 臭氧 /
- 污染成因 /
- 基于观测的模型(OBM) /
- 长沙
Abstract: The impact of ozone on the quality of ecological environment is deepening. Based on the ozone data from 2019 to 2021, ozone levels are more likely to exceed the standard during the summer and autumn. During the key period of ozone pollution, the total radiation ≥0.85 MJ/m2, the maximum temperature ≥32 ℃, and the relative humidity ≤65% are more effective meteorological conditions for ozone generation in Changsha. Based on the observation-based models (OBM), this work also presents the simulation of the optimal emission reduction scheme: the Changsha Environmental Protection Vocational College monitoring site area should separately reduce the proportion of VOCs by 40%; the Environmental Protection Bureau monitoring site area in the High-Tech Zone of Changsha should separately reduce the proportion of VOCs by 21%; the Mapoling monitoring site area can’t meet the standard, but separately reducing VOCs can lead to the fastest decrease in ozone concentration. Therefore, under adverse meteorological conditions, the O3 concentration can be significantly reduced by designing scientific emission reduction programs.-
Key words:
- ozone /
- cause of pollution /
- observation-based model (OBM) /
- Changsha
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