Question

1. Go to Environment Canada Air Quality page @ https://weather.gc.ca/mainmenu/airquality_menu_e.html 2. Go to Air Quality Health Index → Quebec → Montreal (in the table showing provincial summary of current air quality health index values and forecast maximums). a) What are the maximum forecasts for Montreal for the ‘tomorrow's' date? (please, note the date) b) What is the related 'health message'? What do the various 'risk' levels represent? c) Who (what part of the population) is most at risk over this period, and more ] precisely, when? d) What do you think could account for differing ‘risks' within a 24-hr period? e) Return to this page 24 hours later, and note the 'today's' maximum (please, note the date). How this value compares to the forecast from yesterday? 3. Return to the Environment Canada Air Quality page. 4. Go to Air Quality Index → Quebec INFO-SMOG 4. Go to Air Quality Index → Quebec INFO-SMOG What is the forecast for Metro Montreal-Laval for the 'tomorrow's date'? (give a summary). 5. Return to the Environment Canada Air Quality page. 6. Go to Charts →→ Air Quality Forecast Model → 4-panel maps (PM2.5, PM10, 03 near the surface, O3 near 500 metres) →→→ Eastern Canada g) Choose model forecast for tomorrow's date' (T+24), and compare the ozone (03) concentrations near surface and at 500 m altitude (make a screenshot and include in the report). Are there any differences between the two altitudes? What do you think could account for the variability between these altitudes? What are the units for O₂? h) Return to this page 24 hours later, and chose the 'today's' values (Animation, 00 UTC). Make a screenshot and include in the report, note the date. How the values compare to the forecast from yesterday? What is the UTC? 7. Go to the World Air Quality Index project page @ http://aqicn.org/city/montreal/, andlook at the Air Quality Forecast table. i) What are the maximum forecasts for Montreal for the 'tomorrow's' date? j) What variables other than Air Quality variables have been shown in the table? Why do you think these may be important? 8. Go to the World Air Quality Index project → FAQ k) What do the colours and numbers in this AQI scale mean? (Read the full article and briefly explain the scale here in your own words.) 1) Read the full article about the 'Nitrogen dioxide (NO₂) in our atmosphere'. Consider, how the seasonal day lengths change may affect NO₂ concentration in the lower atmosphere? m) Read the full article ‘Air Quality Scale in Quebec and Montreal'. Consider, whether US EPA or Environment Canada AQI better accounts for the combined effects of various air pollutants?

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