新冠肺炎封锁对墨西哥城大都会区PM10和PM2.5浓度影响的评估

IF 0.4 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Revista Internacional De Contaminacion Ambiental Pub Date : 2023-08-02 DOI:10.20937/rica.54659

J. Méndez-Astudillo

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引用次数: 0

摘要

PM10和PM2.5浓度定期监测，因为它们会对人类健康造成不利影响。城市内PM10和PM2.5的浓度因土地使用、交通量和污染源而异。随着新冠肺炎疫情在世界各地蔓延，采取了封锁措施来阻止病毒的传播。这些封锁意味着流动性降低，某些对空气污染源产生影响的经济活动停止。在本文中，我们使用统计分析工具评估了2020年4月至5月墨西哥城大都会区实施的封锁对PM10和PM2.5浓度的影响。MODIS导出的气溶胶光学深度用于评估封锁期间气溶胶空间分布的变化。此外，Mann-Whitney测试应用于地面监测站的PM10和PM2.5数据，以评估封锁的影响。PM10和PM2.5分别下降了20%和10%。总体而言，由于封锁，墨西哥城的颗粒物减少了15%。

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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Assessment of COVID-19 lockdown impact on PM10 and PM2.5 concentrations in the Mexico City Metropolitan Area

PM10 and PM2.5 concentrations are regularly monitored because they cause adverse effects on human health. The concentrations of PM10 and PM2.5 vary within a city due to land use, the amount of traffic, and pollution sources. As the COVID-19 pandemic spread around the world, lockdowns were enacted to stop the spread of the virus. These lockdowns meant reduced mobility and the halt of certain economic activities which had an impact on air pollution sources. In this paper, we assess the effect of the lockdown enacted in April-May 2020 in the Mexico City Metropolitan Area on PM10 and PM2.5 concentrations, using statistical analysis tools. MODIS-derived aerosol optical depth is used to assess the change of aerosols spatial distribution during the lockdown. Furthermore, a Mann-Whitney test is applied to PM10 and PM2.5 data from ground-based monitoring stations to evaluate the effects of lockdown. A general reduction of 20 % of PM10 and 10 % in PM2.5 was found. Overall, a 15 % reduction in particulate matter was found in Mexico City due to lockdown.

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来源期刊

Revista Internacional De Contaminacion Ambiental ENVIRONMENTAL SCIENCES-

CiteScore

0.90

自引率

16.70%

发文量

期刊介绍： En esta revista se aceptan para su publicación trabajos originales y de revisión sobre aspectos físicos y químicos de la contaminación, investigaciones sobre la distribución y los efectos biológicos y ecológicos de los contaminantes; así como sobre tecnología e implementación de nuevas técnicas para su medida y control; también son aceptados estudios sociológicos, económicos y legales acerca del tema. Se publicarán los escritos que mediante arbitraje de especialistas y a juicio del Consejo Editorial tengan el nivel y la calidad adecuados para ello y su contenido será responsabilidad única de los autores. La Revista Internacional de Contaminación Ambiental es de periodicidad trimestral y se publica los días 1 de febrero, mayo, agosto y noviembre.