Should you go outside? Wear a mask? Let us explain.
. To make sense of the current haze, I spoke to Daniel Westervelt, a Lamont Assistant Research Professor at Columbia University’s Lamont Doherty Earth Observatory and an air-pollution adviser to the U.S. State Department. We talked about how to protect yourself, when the skies will clear, and why New Yorkers should prepare for more days like these.
On average, particles in the atmosphere last around seven to ten days. When it rains, the particles interact with the rainfall and then fall out to the surface. The heavier particles can be affected by gravity and don’t need the assist from precipitation to be removed. However, with smoke particles, because the smoke plumes are so hot, they cause a rapid amount of atmospheric convection, which is this strong vertical motion upward.
This is what’s called subsidence and entrainment — smoke entering the lowest part of the atmosphere, the planetary boundary layer, where we breathe. If meteorological conditions are conducive, the smoke can actually be breathed in by people at the surface. And the surface is also where the monitoring sites are located.
If you see AQIs of greater than 100, it’s definitely into the territory of unhealthy, especially for sensitive groups, so for older adults, children, teens, plus people with preexisting conditions — asthma or some kind of respiratory issues — it’s recommended to stay indoors and refrain from strenuous outdoor activity, anything that would require you taking in a higher volume of air that would be laden with these particles.
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