Wavelet Based Semblance Analysis of Anthropogenic Aerosol Control on Air Quality During the COVID-19 Pandemic Period

IF 1.6 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
J. Arul Asir, H. Johnson Jeyakumar, C. P. Anil Kumar
{"title":"Wavelet Based Semblance Analysis of Anthropogenic Aerosol Control on Air Quality During the COVID-19 Pandemic Period","authors":"J. Arul Asir,&nbsp;H. Johnson Jeyakumar,&nbsp;C. P. Anil Kumar","doi":"10.1007/s41810-024-00250-8","DOIUrl":null,"url":null,"abstract":"<div><p>Investigations on air pollutants and air quality were undertaken during the COVID-19 pandemic and pre-pandemic period in Alandur (13.03° N, 80.21° E), Tamil Nadu, India. This comparative study of atmospheric pollutants focuses on the variation between the COVID-19 pandemic period (lockdowns imposed to control the spread of novel coronavirus infection) and the pre-pandemic period with ground-based atmospheric pollution monitoring instruments. The observations were obtained from the Centre for Pollution Control Board (CPCB). The observations from 2018 to 2021 period are used for this investigation. First, the normalizing of the time series revealed the general trends of the atmospheric pollutants present in the specified timeline. Later, spectral estimations were done to unveil the hidden peaks and periodicities during the pre-pandemic period and the COVID-19 period. The power spectral analysis is carried out to comprehend the dispersion and variability of atmospheric pollutants by examining and comparing the power spectrum of a specific station using Blackman–Tukey window analysis, aiming to elucidate the impact of the COVID-19 pandemic on atmospheric pollution dynamics. The results indicate a particular trend at peak business hours (ISTs), with notable periodicities evident throughout each timeline. A significant decrease (~ 42.5%) in the intensities of air pollutants was observed during the COVID-19 period, with no change in O<sub>3</sub> concentrations being observed in the power spectral density windows at either of the two timelines. Thus, the power spectrum analysis provided access to top-to-bottom analysis of anthropogenic pollutants, quantifying the peaks and periodicities present in the pollutants for in-depth analysis and control in the future. Future studies will envisage pollution control technicalities and strategies.</p></div>","PeriodicalId":36991,"journal":{"name":"Aerosol Science and Engineering","volume":"9 2","pages":"140 - 151"},"PeriodicalIF":1.6000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aerosol Science and Engineering","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s41810-024-00250-8","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Investigations on air pollutants and air quality were undertaken during the COVID-19 pandemic and pre-pandemic period in Alandur (13.03° N, 80.21° E), Tamil Nadu, India. This comparative study of atmospheric pollutants focuses on the variation between the COVID-19 pandemic period (lockdowns imposed to control the spread of novel coronavirus infection) and the pre-pandemic period with ground-based atmospheric pollution monitoring instruments. The observations were obtained from the Centre for Pollution Control Board (CPCB). The observations from 2018 to 2021 period are used for this investigation. First, the normalizing of the time series revealed the general trends of the atmospheric pollutants present in the specified timeline. Later, spectral estimations were done to unveil the hidden peaks and periodicities during the pre-pandemic period and the COVID-19 period. The power spectral analysis is carried out to comprehend the dispersion and variability of atmospheric pollutants by examining and comparing the power spectrum of a specific station using Blackman–Tukey window analysis, aiming to elucidate the impact of the COVID-19 pandemic on atmospheric pollution dynamics. The results indicate a particular trend at peak business hours (ISTs), with notable periodicities evident throughout each timeline. A significant decrease (~ 42.5%) in the intensities of air pollutants was observed during the COVID-19 period, with no change in O3 concentrations being observed in the power spectral density windows at either of the two timelines. Thus, the power spectrum analysis provided access to top-to-bottom analysis of anthropogenic pollutants, quantifying the peaks and periodicities present in the pollutants for in-depth analysis and control in the future. Future studies will envisage pollution control technicalities and strategies.

基于小波的新冠肺炎大流行期间人为气溶胶控制对空气质量的相似性分析
对印度泰米尔纳德邦Alandur(13.03°N, 80.21°E) 2019冠状病毒病大流行期间和大流行前的空气污染物和空气质量进行了调查。本次大气污染物对比研究的重点是利用地面大气污染监测仪器分析2019冠状病毒病大流行期间(为控制新型冠状病毒感染的传播而实施的封锁)与大流行前期间的变化。这些观察结果来自污染控制委员会中心(CPCB)。本次调查使用了2018年至2021年期间的观测数据。首先,时间序列的归一化揭示了在指定时间内大气污染物的总体趋势。随后,进行了光谱估计,以揭示大流行前和COVID-19期间的隐藏峰值和周期性。利用Blackman-Tukey窗口分析方法,通过对特定站点的功率谱进行检测和比较,开展功率谱分析,了解大气污染物的弥散和变异性,旨在阐明新冠肺炎疫情对大气污染动态的影响。结果表明,在高峰营业时间(ISTs)有一种特殊的趋势,在每个时间轴上都有明显的周期性。在COVID-19期间,空气污染物强度显著下降(约42.5%),在两个时间线的功率谱密度窗口中均未观察到O3浓度的变化。因此,功率谱分析提供了对人为污染物自上而下的分析,量化污染物中存在的峰值和周期性,以便将来深入分析和控制。未来的研究将设想污染控制的技术和策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Aerosol Science and Engineering
Aerosol Science and Engineering Environmental Science-Pollution
CiteScore
3.00
自引率
7.10%
发文量
42
期刊介绍: ASE is an international journal that publishes high-quality papers, communications, and discussion that advance aerosol science and engineering. Acceptable article forms include original research papers, review articles, letters, commentaries, news and views, research highlights, editorials, correspondence, and new-direction columns. ASE emphasizes the application of aerosol technology to both environmental and technical issues, and it provides a platform not only for basic research but also for industrial interests. We encourage scientists and researchers to submit papers that will advance our knowledge of aerosols and highlight new approaches for aerosol studies and new technologies for pollution control. ASE promotes cutting-edge studies of aerosol science and state-of-art instrumentation, but it is not limited to academic topics and instead aims to bridge the gap between basic science and industrial applications.  ASE accepts papers covering a broad range of aerosol-related topics, including aerosol physical and chemical properties, composition, formation, transport and deposition, numerical simulation of air pollution incidents, chemical processes in the atmosphere, aerosol control technologies and industrial applications. In addition, ASE welcomes papers involving new and advanced methods and technologies that focus on aerosol pollution, sampling and analysis, including the invention and development of instrumentation, nanoparticle formation, nano technology, indoor and outdoor air quality monitoring, air pollution control, and air pollution remediation and feasibility assessments.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信