Impact of covid-19 event on the air quality in Iran

Parya Broomandi, Ferhat Karaca, Amirhossein Nikfal, Ali Jahanbakhshi, Mahsa Tamjidi, Jong Ryeol Kim

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The first novel coronavirus case was confirmed in Iran in mid-February 2020. This followed by the enforcement of lockdown to tackle this contagious disease. This study aims to examine the potential effects of the COVID-19 lockdown on air quality in Iran. From 21st March to 21st April in 2019 and 2020, The Data were gathered from 12 air quality stations to analyse six criteria pollutants, namely O3, NO2, SO2, CO, PM10, and PM2.5. Due to the lack of ground-level measurements, using satellite data equipped us to assess changes in air quality during the study on Iranian megacities, especially in Tehran, i.e., the capital of Iran. In this city, concentrations of primary pollutants (SO2 5–28%, NO2 1–33%, CO 5–41%, PM10 1.4– 30%) decreased with spatial variations. Although, still SO2, NO2, and PM10 exceeded the WHO daily limit levels for 31 days, 31 days, and four days, respectively. Conversely, O3 and PM2.5 increased by 0.5–103% and 2–50%. In terms of the national air quality, SO2 and NO2 levels decreased while AOD increased during the lockdown. Unfavourable meteorological conditions hindered pollutant dispersion. Moreover, reductions in the height of planetary boundary layer and rainfall were observed during the lockdown period. Despite the adverse weather conditions, a decrease in primary pollutant levels, confirms the possible improvements on the air quality in Iran.

Original languageEnglish
Pages (from-to)1793-1804
Number of pages12
JournalAerosol and Air Quality Research
Volume20
Issue number8
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Atmospheric pollution
  • Carbon monoxide
  • Lockdown
  • Nitrogen dioxide
  • SARS-CoV-2
  • Tehran

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

Fingerprint Dive into the research topics of 'Impact of covid-19 event on the air quality in Iran'. Together they form a unique fingerprint.

Cite this