Statistical evaluation of selected air quality parameters influenced by COVID-19 lockdown

IF 3.1 Q2 ENVIRONMENTAL SCIENCES
M. H. Masum, S. Pal
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引用次数: 44

Abstract

Air pollution has become a serious concern for its potential health hazard, however, often got less attention in developing countries, like Bangladesh. It is expected that worldwide lockdown due to COVID-19 widespread cause reduction in environmental pollution in particularly the air pollution: however, such changes have been different in different places. In Chittagong, a city scale lockdown came in force on 26 March 2020, a week after when first three cases of COVID-19 have been reported in Bangladesh. This study aims to statistically evaluate the effects of COVID-19 lockdown (26 March to 26 April 2020) on selected air quality pollutants and air quality index s. The daily average concentrations of air pollutants PM10, PM2.5, NO2, SO2 and CO of Chittagong city during COVID-19 lockdown were statistically evaluated and were compared with dry season data averaging over previous 8 years (2012 to 2019). During lockdown, except NO2, all other pollutants studied showed statistically significant decreasing trend. During the COVID-19 shutdown notable reduction of 40%, 32% and 13% compared to the daily mean concentrations of these previous dry season were seen for PM2.5, PM10 and NO2, respectively. The improvement in air quality index value was found as 26% in comparison to the previous dry season due to less human activities in COVID-19 shutdown. The factor analysis showed that AQI in Chittagong city is largely influenced by PM10 and PM2.5 during COVID-19 shutdown. The lesson learnt in this forced measure of lockdown is not surprising and unexpected. It is rather thought provoking for the decision makers to tradeoff the tangible air quality benefits with ongoing development strategies’ that was often overlooked directly or indirectly.
受新冠肺炎封锁影响的选定空气质量参数的统计评估
空气污染已经成为人们严重关注的潜在健康危害,然而,在孟加拉国等发展中国家,空气污染往往没有得到足够的关注。预计新冠肺炎导致的全球封锁将导致环境污染,特别是空气污染的减少:然而,不同地方的这种变化有所不同。在吉大港,城市范围的封锁于2020年3月26日生效,一周前孟加拉国报告了前三例新冠肺炎病例。本研究旨在统计评估新冠肺炎封锁(2020年3月26日至4月26日)对选定空气质量污染物和空气质量指数的影响,对新冠肺炎封锁期间吉大港市的SO2和CO进行了统计评估,并与过去8年(2012年至2019年)的旱季平均数据进行了比较。在封锁期间,除NO2外,所研究的所有其他污染物都显示出统计学上显著的下降趋势。在新冠肺炎停工期间,PM2.5、PM10和NO2的日均浓度分别比前一个旱季的日均浓度显著下降了40%、32%和13%。与上一个旱季相比,由于新冠肺炎停工期间人类活动减少,空气质量指数值提高了26%。因子分析表明,在新冠肺炎关闭期间,吉大港市的空气质量指数在很大程度上受到PM10和PM2.5的影响。从这种强制封锁措施中吸取的教训并不令人惊讶和意外。决策者在有形的空气质量效益与经常被直接或间接忽视的持续发展战略之间进行权衡,这相当发人深省。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.90
自引率
2.90%
发文量
11
审稿时长
8 weeks
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