Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ A beautiful yet gloomy map shows how smoke from fire spreads

A beautiful yet gloomy map shows how smoke from fire spreads



Now click on “Vertically integrated smoke” in the map menu. Instead of measuring smoke about 8 meters from the ground, he models what a 25-kilometer air column looks like somewhere in the United States. (Think of it as the smoke you can see in the sky, and the smoke from the near surface is the things you actually breathe.) As you can see, on this scale, the smoke now covers most of the country.

To outline this, HRRR looks at the infrared intensity of these fires and predicts how much smoke the fire produces. This smoke starts from the vortices of what atmospheric scientists call the boundary layer. “This is the layer through which you feel swelling when you land on a plane in the late afternoon all over the country,”

; says Benjamin. “But then some of that air mixes higher above the boundary layer and then encounters stronger horizontal winds.” This carries smoke from west to east.

And as this smoky air moves across the country, Benjamin adds, “it’s mixed by the turbulent mixing that happens during the day. And that way you get some of it to show up close to the surface again. “

Click back to the “Near Surface Smoke” option and you will see that only a small fraction of these smoke particles actually fall from the atmosphere and reach the land of the East Coast. So, unlike the people of the Bay Area, you have nothing to worry about if you are in New York or Philadelphia. “That’s the difference in size,” Benjamin, the unfortunate Californian, tells me. “You get up with cream.”

But although HRRR is still experimental, it is fast becoming a critical tool for meteorologists and atmospheric scientists, as no one has so far been able to predict clouds of smoke like this. Earlier, researchers had just been able to look at satellite images to see where they were smoking at present f. This is really the first resource that has been there that tells you something about where the smoke you see actually comes from and what the forecast is, ”says atmospheric scientist Joost de Guu of the Cooperative Institute for Scientific Research. for the Environment at the University of Colorado, Boulder.

This helped de Gou plan his experiments, in which he made atmospheric measurements from airplanes to study how chemically smoke changes as it makes its way through the air. If he knows where the smoke is going, he knows where to take samples. “Most people think of smoke particles when they think of smoke,” says de Guu. “But also a lot of gases come with smoke, and a lot of those gases are highly reactive – they change over an hour.”


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