BQNA
Air Quality Study

Q2: Under which conditions do higher UFP levels occur?

UFP Double During Southerly vs. Northerly Wind

When the wind blows from the south

  • Analysis time window: 6 a.m. – 10 p.m.
  • Southerly wind
  • Ferry Terminal downwind vs. Hanlan’s Point upwind
  • June 2022 – August 2022

Lower UFP Concentrations during the COVID Lockdown

  • Pre-Lockdown: Jan 21 – Feb. 27, 2020
  • Lockdown: Apr 20 – Jun 12, 2020
  • Recovery: Jul 27 – Sept 15, 2020
  • Post-Lockdown: Jun 8 – Aug 22, 2022 

Short-term UFP Spikes Evident across the Neighbourhood