在COVID-19封锁和解锁阶段,南印度城市的空气质量存在显著差异
Shibani Navasakthi1, Anuvesh Pandey1, Jashanpreet Singh Bhari1
1Department of Civil Engineering, Chandigarh University, Mohali, Punjab, India.
Environmental monitoring and assessment
|May 30, 2023
概括
由于COVID-19的封锁,南印度城市的空气质量有了显著的改善,减少了颗粒物 (PM2.5,PM10) 和二氧化 (NO2). 降雨量和风速是影响污染物水平的关键因素.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 公共卫生 公共卫生
背景情况:
- 由于COVID-19大流行,全球都需要封锁,这影响了工业和车辆排放.
- 了解这些限制对城市空气质量的影响对于环境政策至关重要.
研究的目的:
- 在南印度主要城市的COVID-19封锁期间统计分析空气质量的变化.
- 评估PM2.5,PM10,NO2和SO2度在封锁前,封锁后和解锁阶段的变化.
主要方法:
- 从中央污染控制委员会 (CPCB) 从2020年3月至11月收集的空气污染物数据 (PM2.5,PM10,NO2,SO2).
- 使用差异分析 (ANOVA) 来比较不同时间段的污染物度.
- 使用Tukey HSD进行后期分析和Pearson相关性来检查与气象参数 (温度,降雨量,风速) 的关系.
主要成果:
- 在研究的城市和阶段 (p < 0.001) 观察到污染物度的显著变化.
- 封锁导致班加罗尔,科伊姆巴托尔和海德拉巴的PM2.5,PM10和NO2减少,但PM10和NO2在奈增加.
- 降雨对所有城市的污染物水平产生了重大影响,其次是风速和温度,而温度在班加罗尔没有显著影响.
结论:
- 通过减少关键污染物,COVID-19封锁明显改善了大多数研究的南印度城市的空气质量.
- 气象因素,特别是降雨,在减少排放期间在调节空气污染物度方面发挥着重要作用.
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