AOSC Departmental Seminar
September 3, 2015

Data Assimilation of Atmospheric Composition for Air Quality and Stratospheric Applications, With an Introduction on Environmental and Health Impacts

Richard Menard
Air Quality Research Division, Environment Canada

Operational air quality forecasting began in Canada in 2000 with an offline chemical transport model called CHRONOS.  Already in 2002, and experimental version of an air quality surface analysis was developed by combining AirNow real-time surface observation with model forecasts.  In 2013 analyses of O3 and PM2.5 became operational at a resolution of 10 km over Canada and USA. We will briefly discuss the specifics of the scheme, the technical implementation that lead to an operational implementation, a description and validation of the product as it stands today.  The analyses have now been extended to include NO2, NO, SO2, PM10 and results in a mapping of an Air Quality Health Index.  Much of these efforts are supported by the need of having long-term accurate representation of the air quality at the surface for epidemiologic studies of the effect of air quality on health.  We will first discuss some aspects of the impact on health that we learned from our collaborators from Health Canada and the clinical cardiologist such as Dr Reeves who is developing a chair on Environmental Cardiology at University of Montreal.  Aside from surface analysis of air pollution we are also developing chemical data assimilation integrated with our meteorological data assimilation system.  Environment Canada is also leading an effort by an international team to further develop and promote scientific applications of stratospheric chemical data assimilation.  A short review will be presented.