SOCAAR Seminar – Observing global fine-scale changes in ambient NO2 during COVID-19 lockdowns using satellites

When:
April 6, 2022 @ 3:00 pm – 4:00 pm
2022-04-06T15:00:00-04:00
2022-04-06T16:00:00-04:00
Where:
Microsoft Teams
Contact:

Join SOCAAR at their next seminar on Wednesday, April 6th from 3pm-4pm!

Observing global fine-scale changes in ambient NO2 during COVID-19 lockdowns using satellites

Matthew Cooper
Physical Science Officer
Environment and Climate Change Canada

Nitrogen dioxide (NO2) is an important contributor to air pollution with serious health
effects. Many reports have shown that NO2 concentrations decreased in 2020 during COVID19 lockdowns, but these studies are limited by the availability of air quality monitoring
globally. In this talk, I will show how we use satellite observations to infer global fine
resolution (~1km) ground-level NO2 concentrations. Using these observations, we find that
mean NO2 concentrations are ~30% lower in countries with strict COVID-19 lockdowns than
in those without. I will also present case studies that compare lockdown-driven changes to
long-term NO2 trends, and show how the sensitivity of NO2 to lockdowns varied across cities,
countries, and emissions sectors.

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