What AQI Actually Measures (It's Not What You Think)

Описание: June seventh, twenty twenty-three. The sky over New York turned orange, and one hourly air quality reading hit four hundred and eighty-four: hazardous. The fires were hundreds of miles away, in Quebec. So what was New York breathing, and what does that number mean?

Get Forecast Bar for Mac, the app in this video:
Mac: https://apps.apple.com/us/app/forecas...

The full lesson, written up with diagrams: https://forecastbar.com/learn/what-aq...

Chapters
0:00 What was New York breathing?
0:20 How small is PM2.5?
0:37 Why size matters
0:53 The uneven ladder
1:15 Who is warned
1:26 The smoke you see vs. the smoke you breathe
1:48 The Wildfire Smoke layer
1:59 When the air clears: the PM2.5 forecast
2:14 Know when the air clears

▶ Watch it as a Short:    • The smoke you see isn't the smoke you breathe  
More lessons:    • Weather Data, Decoded  

Sources and fact sheet: see the lesson page above.

#SkyScience #WhatIsAQI #PM25Explained