Impact of Lockdown on Air Pollutants during COVID-19 at Patna, India

IF 1.1 Q4 METEOROLOGY & ATMOSPHERIC SCIENCES

Asian Journal of Atmospheric Environment Pub Date : 2021-12-01 DOI:10.5572/ajae.2021.045

Mohammed Aasif Sulaiman, Mohammad Masroor Zafar, Nishat Afshan, Anupma Kumari

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Abstract

Many countries shut their borders, imposed nationwide lockdown, and restricted several anthropogenic activities to arrest the spread of COVID-19. In the present study, the concentration of several air pollutants(PM₁₀, PM_2.5, NO₂, NH₃, SO₂, CO and O₃) during different phases of lockdown from monitoring stations of Patna was analyzed to assess the effect of lockdown restriction on air quality. Reduction in PM_2.5, NH₃, NO₂, PM₁₀ and CO concentration was observed by 59.79%, 58.2%, 49.49%, 39.57% and 24.04%, respectively during the lockdown period. National Air Quality Index(NAQI) value in the year 2020 had been observed to lower by 57.88% compared to the year 2019, during the same period. A more significant fall in the concentration of air pollutants was observed during the early phase of post-lockdown compared to the late stages of post-lockdown. The study reflects the significance of restriction on anthropogenic activities in improving air quality and provides clues for future action plans for improving air quality.

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印度巴特那 COVID-19 期间封锁对空气污染物的影响

许多国家关闭了边境，在全国范围内实施封锁，并限制多项人为活动，以阻止 COVID-19 的扩散。本研究分析了巴特那监测站在不同封锁阶段的几种空气污染物（PM10、PM2.5、二氧化氮、氮氧化物、二氧化硫、一氧化碳和臭氧）的浓度，以评估封锁限制对空气质量的影响。在封锁期间，PM2.5、NH3、NO2、PM10 和 CO 的浓度分别下降了 59.79%、58.2%、49.49%、39.57% 和 24.04%。与 2019 年相比，2020 年的国家空气质量指数（NAQI）值同期下降了 57.88%。与关闭后的后期阶段相比，关闭后的早期阶段空气污染物浓度下降更为明显。这项研究反映了限制人为活动对改善空气质量的重要意义，并为未来改善空气质量的行动计划提供了线索。

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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