Tue. Oct 19th, 2021


As a huge bushfire Raged across Eastern Australia In January 2020, a Deadly smoke Settling across Melbourne, a clear signal for residents to stay indoors. Although there was a slightly clearer signal that they were shaking their heads: cellular data was flying in an odd pattern in the air, one that would enable scientists to better understand and predict future deadly smoking events.

The cell signals above Melbourne were interacting with an atmospheric crack known as a temperature crash. Typically, you will find warmer temperatures near the ground, where the sun is warming the surface and cooler temperatures are higher in the atmosphere. However, a temperature crash with its name leaves it behind.

When a layer of smoke rolls across the city, it absorbs the sun’s energy and keeps most of this radiation away from the heat. This created a layer of hot, dry, smoky air that sat on top of the cool air at ground level. “You have this double process,” said Adrian Goet, an atmospheric scientist at Monash University, a new author. Paper In the journal AGU Advances Research Description. “Your level has warmed up and the ground is not warming up as normal”.

It worked strangely on the transmission signals in the cellular antenna above the building in Melbourne. (Goethe and his colleagues were specifically looking at antenna-to-antenna communication over the network, not how people’s mobile phones were connecting to them at) Usually when these antennas talk to each other, the signal is more or less direct. A temperature crash, however, creates a kind of atmospheric cap, dramatically bending the signal toward the ground.

These are known as “conditions of irregular broadcasting”, which means that a signal travels well, remarkably. “It will come down from the ground and then rise again and then come down from the ground and go up again. So it will get stuck at the opposite level, “says Guyot. As the signal increases, the travel time between the antennas is different than normal, when its path is straight. Guyot added,” And because it doesn’t always arrive at the same time, sometimes you have a high reception. , Sometimes you have less reception Guy “” and it’s really clear on the signal. “

By looking at this cellular data, Guyot was able to identify when a temperature catastrophe had passed over Melbourne while the forest fires were burning in Australia. In addition to trapping these signals, the reverse layer was trapped in smoke, thus creating a data record as the city became air quality. The worst in the world. In the future, Goethe thinks, it was possible to observe these cell signals for indications of where an evolution could take place and how intense it could be. This will give officials a better idea of ​​how fast air quality can deteriorate. Guyot said, “If your temperature is reversed and if this catastrophe intensifies, the amount of smoking concentration is also likely to increase.

Imagine the colorful dumping of food in a kiddie pool compared to a small Olympic pool – even with the same amount of pigment you get darker water in smaller sizes than larger ones. The denser smoke trapped in a thin layer of air near the ground is the same as the more widespread smoke in the open air. No. “So it is located close to the ground, is highly concentrated, and there is more pollution in this ground that could affect humans.”



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