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Hi Everyone, SOCAAR is pleased to announced next Seminar. Wednesday, April 6, 2022 3:00 - 4:00PM Matthew Cooper Physical Science Officer Environment and Climate Change Canada Observing global fine-scale changes in ambient NO2 during COVID-19 lockdowns using satellites 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 COVID-19 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. ________________________________________________________________________________ Microsoft Teams meeting Join on your computer or mobile app Click here to join the meeting<https://teams.microsoft.com/l/meetup-join/19%3ameeting_OTk5N2JlNDQtMzVjOC00ZTdkLWE0YTYtMDRkMTYzY2E1MmU5%40thread.v2/0?context=%7b%22Tid%22%3a%2278aac226-2f03-4b4d-9037-b46d56c55210%22%2c%22Oid%22%3a%2276a2f469-c5cc-446a-8132-c4bf6f5856ed%22%7d> Or call in (audio only) +1 647-794-1609,,612523657#<tel:+16477941609,,612523657#> Canada, Toronto Phone Conference ID: 612 523 657# Find a local number<https://dialin.teams.microsoft.com/d82c5eb5-d575-428c-bac3-869ecf09d547?id=612523657> | Reset PIN<https://mysettings.lync.com/pstnconferencing> Learn More<https://aka.ms/JoinTeamsMeeting> | Meeting options<https://teams.microsoft.com/meetingOptions/?organizerId=76a2f469-c5cc-446a-8132-c4bf6f5856ed&tenantId=78aac226-2f03-4b4d-9037-b46d56c55210&[log in to unmask]&messageId=0&language=en-US> ________________________________________________________________________________