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Last week, The U.S. Maritime Research Laboratory gave a press conference in 2021, and scientists reported that in 2021 a “foggy thunderstorm” appeared. Catastrophic fires, exacerbate catastrophic climate change, created a rash pyrocumulonimbo lumak In the western United States and Canada, popularly known as scientific pyroCb.
“You can think of them as giant chimneys that direct smoke that flows into a thunderstorm,” meteorologist from research lab David Peterson said at a Zoom press conference. “You can imagine this dirty thunderstorm with these smoke particles condensing on the water.”
Unlike an ordinary thunderstorm, however, the resulting water droplets are not large enough to fall as rain. “But it’s a cloud that can cause a lot of lightning,” Peterson added. These clouds can advance through the landscape, creating new fires as they progress. So the fire itself can only spread by spreading embers before the main line (California fires are very deadly in part because of the strong seasonal winds push them at a tremendous speed), can cause so much smoke to rise and rise that it basically hires the atmosphere to ignite more fire. It is an elusive self-breeding machine.
The pyrocumulonimbus feathers also ignited the fire. As the hot air moves away from the fire, air near the ground enters to fill the gap, overloading the wind speed on the surface. Because PyroCb is a thunderstorm, it also creates a downward current along with that current, creating a very irregular wind behavior near the surface. Basically, if you expect a fire caused by pyroCb to act rationally, it will roam the landscape with prevailing winds, you will come up with something else.
And these can be pyroCbs huge. The more fires there are, the more air it creates. “These are pushing smoke upwards at extreme speeds, such as injecting smoke above the crossed height of jet aircraft,” Peterson said. “So we’re talking 50, 60,000 feet, potentially.” In fact, he says, the smoke will flow to the next layer of the atmosphere, the stratosphere, which is above where the weather normally occurs. Peterson added that a pyroCb that originated in British Columbia in 2017 created a feather that lasted 10 months in the stratosphere.
Once all these smoke aerosols enter the stratosphere, they can have a contradictory effect. As they can block out the sun, they will cool the landscape below. But the feather itself will absorb the sun’s energy, heating the air locally to create a “thermal bubble”. This creates an atmospheric engine that drives the circulation of smoke, which scientists have called a “vortex”. “So this small motor event caused by the introduction of smoke into the stratosphere creates its own stratospheric weather,” Mike Fromm, a remote sensing division at the U.S. Naval Research Laboratory, said at a news conference. “That is a new discovery, but it is very real. And now we have seen it in many cases. ”
In late June, Peterson and Fromm followed one of the largest pyroCb feathers ever recorded in North America. The formation of these types of clouds may not be a mistake, but rather a characteristic of a vanished climate. “We’ve been on a wave of pyroCb activity in North America — close to daily activity in recent days,” Peterson said.
The a bushy season 2019-2020 In Australia, for example, he produced 38 of those feathers in just a few days. He has also created Siberia, from all places the local landscape is heated, dry, and turns on. “There have been a lot of them, I would say, in recent fire seasons,” says UCLA climate scientist Daniel Swain. “And there are probably several different reasons for that.”
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