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How Unusual, Bouncy Color Signs Can Help Follow Hot Smoke


Like a great wildfire he angrily passed by eastern Australia in January 2020, a haze gave it to you settled in Melbourne, a clear indication that citizens should live in homes. The shot in their head, however, was a well-known sign: Most cellular particles were flying in the air in a mysterious way, which scientists could use to understand and predict future smoke attacks.

The cells at the top of Melbourne were connected to an atmosphere called temperature fluctuations. Most of the time, you find warmer temperatures near the ground, where the sun is hotter on the surface, as well as colder temperatures on the surface. But, as its name implies, temperature fluctuations reduce this.

When the smoke engulfed the city, it absorbed most of the sun’s rays, preventing radiation from reaching the surface. This created a hot, dry, smoky air that sat on top of the cold air below. “You have both of these events,” says Monash University astronomer Adrien Guyot, executive secretary of the new paper in the newspaper AGU Advancement explain the research. “You have a hot iron, and the soil is not as hot as it used to be.”

This did a strange thing to the signs that spread out among the tiny antennae that were on top of Melbourne buildings. (Guyot and their peers are more likely to focus on antenna and network connections, not on cell phones.) Usually, when the antennas are in contact, the signal will flow directly between them. But temperature fluctuations create a different kind of atmosphere, and distort the signal to the ground.

This is known as a “scattering phenomenon,” meaning that the signal moves, right, wrong. “It’ll come back down, and then go up again, and then come back down, and go back. That’s why it’s going to fall into its clutches, “says Guyot.” Because the sign is coming, the time to walk between the ants is different from the way it would always be, while the path is straight. ” ono, “adds Guyot.” And it certainly does. “

By looking at these numbers, Guyot can tell when the global warming ended in Melbourne and Australia when it did. In addition to the signaling process, the inventions were also exposed to smoke, creating a history of the city’s atmosphere. worst in the world. In the future, Guyot thinks, it may be possible to examine the cells to see where the disruption can be made and how serious it can be. This can give supervisors a better idea of ​​how quickly air can be reduced. “If you have temperature fluctuations, and if the temperature rises, then you too will get more smoke,” says Guyot.

Imagine throwing food paint in a children’s pool against an Olympic pool – even if you throw the same paint, you will find dark water a little darker than a big one. The same goes for persistent smoke inhaled with less air near the ground, compared to smoke that is more prevalent in the open. “This change means that the smoke will not be released into the atmosphere,” says Rebecca Buchholz, an astronomer at the National Center for Atmospheric Research, who did not participate in the new project. “As a result it stays close to the ground, it becomes more stable, and there are a lot of destructive elements that can affect humans.”


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