PulseExploreJournal ClubResearchersJournals
Instagram
HomeJournal ClubExplore
Synapse
⌘+K
Synapse
March 30, 2026Environmental DiseaseOpen Access

A breath of fresh air? Assessing the significant decline in PM2.5 and O3 pollution in Kathmandu valley during the coronavirus disease 2019 lockdown

View Full Paper
Ask AI
Bookmark
Share

Authors

BMBishwash MaharjanYJYogesh JoshiAPAmod K. Pokhrel

Discussion

Loading...

Member takes

Overview

Analysis reveals significant declines in PM2.5 and ozone pollution during lockdown, indicating cleaner energy strategies may improve air quality.

Key Points

  • Assess changes in air quality, specifically PM2.5 and O3, during COVID-19 lockdown in Kathmandu Valley.
  • Analyzed daily air quality data from seven monitoring stations.
  • Conducted non-parametric Mann–Kendall tests and Theil–Sen slope estimators.
  • Compared pollution levels during lockdown to pre-lockdown periods in previous years.
  • PM2.5 and O3 levels declined by 31.66% and 8.17% respectively during lockdown.
  • Statistically significant monthly declines observed for PM2.5 (–9.55 µg/m³) and O3 (–1.68 µg/m³).
  • Findings suggest reduced anthropogenic emissions are linked to lockdown-induced air quality improvements.

Cite This Study

Maharjan et al. (2025) studied this question.

synapsesocial.com/papers/69c9c5e2f8fdd13afe0be009https://doi.org/10.4103/ed.ed_20_25
View Full Paper
Ask AI
Bookmark
Share

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Improvement of Air Quality During Lockdown Period of COVID-19 Pandemic in Kathmandu Valley, Nepal2024
  2. 2Seasonal variation assessment of ambient air quality during COVID-19 lockdown in Uttarakhand state, India2024 · 5 citations
  3. 3The COVID-19 lockdown impact on air quality: A Case Study of Two Districts in Kabul City, Afghanistan2025 · 1 citations
  4. 4COVID-19 lockdown altered atmospheric pollutant dynamics across major Indian cities2026
  5. 5A brief on intertwined physico-chemical interactions of air pollutants during COVID-19 lockdown2024