Trends and emissions of ammonia and its influence on air quality in the UK deduced with satellite and surface observations and the GEOS-Chem model

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• Dr. Eloise Marais, University College London
• Monday 30 November 2020, 11:00-12:00
• Zoom: https://us02web.zoom.us/j/89471866908?pwd=THAxZDNzc2ZhSURyRmh6VGtpSXAyQT09.

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Ammonia contributes to the formation of fine particles or PM2 .5 that are hazardous to our health. Its relative contribution to PM2 .5 is increasing in Europe, North America and China due decline in sulfate from policies targeting SO2 sources and decline in nitrate from policies targeting NOx sources. There are no direct controls on ammonia from agriculture, the largest ammonia source in the UK, and it is notoriously difficult to accurately estimate emissions of ammonia due to dependence on farming activity and environmental factors. In this talk, I will present research underway in my group to determine long-term changes of ammonia in cities in the UK, to estimate emissions of ammonia throughout the UK, to evaluate the UK National Atmospheric Emission Inventory representation of ammonia emissions, and to assess regional influence of ammonia on air quality in a UK city.

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

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• Zoom: https://us02web.zoom.us/j/89471866908?pwd=THAxZDNzc2ZhSURyRmh6VGtpSXAyQT09

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