Affiliations 

  • 1 Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400, Selangor, Malaysia. Electronic address: adherizky02@gmail.com
  • 2 Department of Logistics Engineering, School of Industrial and System Engineering, Telkom University, 40257, Bandung, Indonesia. Electronic address: prafajars@telkomuniversity.ac.id
  • 3 Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, 55281, Yogyakarta, Indonesia. Electronic address: dwiadi2.purnama@gmail.com
Environ Res, 2021 06;197:111164.
PMID: 33872645 DOI: 10.1016/j.envres.2021.111164

Abstract

The variation in the concentration of outdoor air pollutants during the COVID-19 lockdown was studied in Jakarta, Indonesia. The term lockdown was replaced by large-scale social restrictions (PSBB) in Indonesia by more flexible regulations to save the economy. Data on five air pollutants, namely, PM10, SO2, CO, O3, and NO2, from five monitoring stations located in five regions in Jakarta (West, East, Central, North, and South Jakarta) were utilized. We analyzed the changes in the concentrations of outdoor air pollutants before lockdown from January 1 to April 9, 2020, and during lockdown from April 10 to June 4, 2020. Overall, the CO concentration (39.9%) demonstrated the most significant reduction during lockdown, followed by NO2 (7.5%) and then SO2 (5.7%). However, we unexpectedly found that during lockdown, the PM10 concentration in Jakarta increased by 10.9% due to the southwest monsoon during the seasonal change in Jakarta. Among the five cities in Jakarta, East and Central Jakarta experienced the maximum improvement in their air quality, whereas North Jakarta had the least air quality improvement. To the best of our knowledge, this research is the first to study the effect of lockdown on outdoor air quality improvement in Indonesia using ground-level measurement data. The findings of the study provide additional strategies to the regulatory bodies for the reduction of temporal air pollutants in Jakarta, Indonesia, by restricting people mobility as a supplementary initiative.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.