Sarkar Showmitra Kumar, Khan Md Mehedi Hasan
Department of Urban and Regional Planning, Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh.
REACH Initiative, Cox's Bazar, Bangladesh.
Disaster Med Public Health Prep. 2021 Apr 30:1-4. doi: 10.1017/dmp.2021.131.
The purpose of the research was to investigate and identify the impact of COVID-19 lockdown on fine particulate matter (PM2.5) pollution in Dhaka, Bangladesh by using ground-based observation data.
The research assessed air quality during the COVID-19 pandemic for PM2.5 from January 1, 2017 to August 1, 2020. The research considered pollution in pre-COVID-19 (January 1 to March 23), during COVID-19 (March 24 to May 30), and post-COVID-19 (May 31 to August 1) lockdown periods with current (2020) and historical (2017-2019) data.
PM2.5 pollution followed a similar yearly trend in year 2017-2020. The average concentration for PM2.5 was found 87.47 μg/m3 in the study period. Significant PM2.5 declines were observed in the current COVID-19 lockdown period compared with historical data: 11.31% reduction with an absolute decrease of 7.15 μg/m3.
The findings of the research provide an overview of how the COVID-19 pandemic affects air pollution. The results will provide initial evidence regarding human behavioral changes and emission controls. This research will also suggest avenues for further study to link the findings with health outcomes.
本研究旨在利用地面观测数据，调查并确定新冠疫情封锁措施对孟加拉国达卡细颗粒物（PM2.5）污染的影响。
本研究评估了2017年1月1日至2020年8月1日新冠疫情期间的PM2.5空气质量。该研究采用当前（2020年）和历史（2017 - 2019年）数据，考量了新冠疫情前（1月1日至3月23日）、新冠疫情期间（3月24日至5月30日）以及新冠疫情后（5月31日至8月1日）封锁期间的污染情况。
2017 - 2020年期间，PM2.5污染呈现出相似的年度趋势。在研究期间，PM2.5的平均浓度为87.47μg/m³。与历史数据相比，在当前新冠疫情封锁期间，PM2.5显著下降：下降了11.31%，绝对降幅为7.15μg/m³。
本研究结果概述了新冠疫情如何影响空气污染。这些结果将为人类行为变化和排放控制提供初步证据。本研究还将为进一步研究提供途径，以便将研究结果与健康结果联系起来。
